Broiler Breeders

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Xugang Luo - One of the best experts on this subject based on the ideXlab platform.

  • effects of environmental temperature and dietary zinc on egg production performance egg quality and antioxidant status and expression of heat shock proteins in tissues of Broiler Breeders
    British Journal of Nutrition, 2018
    Co-Authors: Xiudong Liao, Liyang Zhang, Xi Lin, Yongwen Zhu, Xugang Luo
    Abstract:

    To investigate the effects of environmental temperature and dietary Zn on egg production performance, egg quality and antioxidant status, as well as expression of heat-shock proteins (HSP) in tissues, of laying Broiler Breeders, we used a completely randomised design with a 2×3 factorial arrangement of treatments. The two environmental temperatures were normal (21±1°C, NT) and high (32±1°C, HT). The three dietary Zn sources were a Zn-unsupplemented basal diet (CON), and the basal diet supplemented with 110 mg Zn/kg as either the inorganic Zn sulphate (iZn) or the organic Zn proteinate with a moderate chelation strength (oZn). HT decreased (P<0·002) egg weight, laying rate, eggshell strength, thickness and weight, but increased (P≤0·05) rectal temperature, broken egg rate, misshapen egg rate, feed:egg ratio, Cu Zn superoxide dismutase activities in liver and pancreas, as well as metallothionein (MT) level in pancreas, and HSP70 mRNA levels in liver and pancreas of laying Broiler Breeders. Broiler Breeders fed the oZn diet had higher (P<0·04) Zn content in the liver, as well as MT levels in the liver and pancreas, compared with those fed the CON diet. Under HT, Broiler Breeders fed the oZn diet had higher (P<0·05) Zn content in the pancreas compared with those fed the iZn and CON diets. The results from this study indicated that HT impaired egg production performance and eggshell quality possibly because of the disturbed redox balance and HSP homoeostasis, whereas the oZn is more available than the iZn for pancreatic Zn of heat-stressed laying Broiler Breeders.

  • effect of dietary manganese on antioxidant status and expressions of heat shock proteins and factors in tissues of laying Broiler Breeders under normal and high environmental temperatures
    British Journal of Nutrition, 2015
    Co-Authors: Yongwen Zhu, Liyang Zhang, Xi Lin, Hsiaoching Liu, Jack Odle, Xugang Luo
    Abstract:

    To investigate the effect of Mn on antioxidant status and expression levels of heat-shock proteins/factors in tissues of laying Broiler Breeders subjected to heat challenge, we used a completely randomised design (n 6) with a factorial arrangement of 2 environmental temperatures (normal, 21 (sem 1)°C and high, 32 (sem 1)°C)×3 dietary Mn treatments (an Mn-unsupplemented basal diet (CON), or a basal diet supplemented with 120 mg Mn/kg diet as inorganic Mn sulphate (iMn) or organic Mn proteinate (oMn)). There were no interactions (P>0·10) between environmental temperature and dietary Mn in all of the measured indices. High temperature decreased (P<0·003) Mn content, and also tended (P=0·07) to decrease copper zinc superoxide dismutase (CuZnSOD) activity in the liver and heart. However, an increased manganese superoxide dismutase (MnSOD) activity (P<0·05) and a slight increase of malondialdehyde level (P=0·06) were detected in breast muscle. Up-regulated (P<0·05) expression levels of heat-shock factor 1 (HSF1) and HSF3 mRNA and heat-shock protein 70 (HSP70) mRNA and protein were found in all three tissues. Broiler Breeders fed either iMn or oMn had higher tissue Mn content (P<0·0001), heart MnSOD and CuZnSOD activities (P<0·01) and breast muscle MnSOD protein levels (P<0·05), and lower (P<0·05) breast muscle HSP70 mRNA and protein levels than those fed CON. Broiler Breeders fed oMn had higher (P<0·03) bone Mn content than those fed iMn. These results indicate that high temperature decreases Mn retention and increases HSP70 and HSF1, HSF3 expression levels in tissues of laying Broiler Breeders. Furthermore, dietary supplementation with Mn in either source may enhance heart antioxidant ability and inhibit the expression of HSP70 in breast muscle. Finally, the organic Mn appears to be more available than inorganic Mn for bone in laying Broiler Breeders regardless of environmental temperatures.

  • effects of acute and chronic heat stress on plasma metabolites hormones and oxidant status in restrictedly fed Broiler Breeders
    Poultry Science, 2015
    Co-Authors: Jingjing Xie, Li Tang, Liyang Zhang, Xi Lin, Hsiaoching Liu, Jack Odle, Xugang Luo
    Abstract:

    Heat tolerance can be improved by feed restriction in Broiler chickens. It is unknown whether the same is true for Broiler Breeders, which are restrictedly fed. Therefore, the current study was conducted to study the effects of heat stress on plasma metabolites, hormones, and oxidative status of restricted fed Broiler Breeders with special emphases on the temperature and latency of heat exposure. In trial 1, 12 Broiler Breeders were kept either in a thermoneutral chamber (21°C, control, n = 6) or in a chamber with a step-wise increased environmental temperature from 21 to 33°C (21, 25, 29, 33°C, heat-stressed, n = 6). Changes in plasma total cholesterol, glucose, and triiodothyronine (T3) were closely related to the environmental temperature. When the temperature reached 29°C, plasma T3 (P < 0.05) was significantly decreased in acute heat-stressed birds, whereas plasma glucose (P < 0.001) and cholesterol (P = 0.002) increased only when the temperature reached 33°C. Plasma triglyceride (P = 0.026) and creatine kinase (CK, P = 0.018) were lower in heat-stressed birds than controls regardless of the temperatures applied. In Trial 2, 24 Broiler Breeders were divided into 2 groups and raised under 21°C and 32°C for 8 weeks, respectively. Total cholesterol was increased in chronic heat-stressed Broiler Breeders after 4 weeks. Plasma lactate dehydrogenase (LDH, P = 0.047) and glutamic-oxaloacetic transaminase (GOT, P = 0.036) was up-regulated after 6 weeks of thermal treatment, whereas plasma CK (P = 0.009) was increased at the end of thermal treatment. Plasma malonaldehyde, protein carbonyl content, activity of total superoxide dismutase (SOD), and corticosterone content were not altered after acute and prolonged heat challenges. Taken together, acute heat stress primarily resulted in disturbance of plasma metabolites, whereas chronic heat stress caused tissue damage reflected by increased plasma LDA, GOT, and CK. During acute heat stress, plasma metabolites were minimally disturbed in Broiler Breeders until the environmental temperature reached 33°C.

R. M. Gous - One of the best experts on this subject based on the ideXlab platform.

  • Energy partitioning at low temperatures in Broiler Breeders
    Animal Production Science, 2019
    Co-Authors: M. K. Nonis, R. M. Gous
    Abstract:

    The objective of the present study was to investigate how Broiler breeder hens partition dietary metabolisable energy (ME) at low temperatures. Performance of caged Broiler Breeders fed equal quantities of essential nutrients (other than energy) was measured in six environmental chambers, with the temperature in each chamber being kept constant at 10°C, 12.5°C, 15°C (two chambers), 17.5°C or 20°C for two 6-week periods. Throughout these two trial periods, birds were fed 160 g/day of one of four diets containing 12.9, 11.9, 10.5 or 9.7 MJ apparent ME/kg, so that daily energy allocations ranged from 1552 to 2964 kJ/bird. Irrespective of the environmental temperature to which they were subjected, Broiler Breeders consumed virtually all of the feed allocated to them each day. Mean rate of lay and egg output in the final 3 weeks of each period of hens on the highest apparent ME feed was unaffected by the decrease in temperature from 19.5°C to 9.9°C, but equally depressed on the three lower energy levels. Both weight gain and egg weight increased marginally, but significantly, as the temperature decreased. As a function of body protein weight (BP, kg), egg output (EO, g/day) and growth (ΔW, g/day), the ME consumed (kJ/day) by Broiler Breeders over all treatments was partitioned as follows: 2423 (±30.3) BP + 7.04 (±0.41) EO + 13.5 (±1.10) ΔW. An ME intake of 1900 kJ/bird.day would appear to be adequate for Broiler Breeders over the range of temperatures used in the trial.

  • Illuminance and egg production in Broiler Breeders
    British Poultry Science, 2009
    Co-Authors: P. D. Lewis, R. Danisman, R. M. Gous
    Abstract:

    1. Ross Broiler Breeders were reared at a nominal illuminance of 15, 20 or 45 lux and transferred to a nominal illuminance of 25, 55 or 70 lux at 20 weeks. 2. There were no significant interactions between the response to illuminance during rearing and in lay. This means that it matters not whether illuminance is increased, decreased or held constant on transfer to the laying house, provided it equals or exceeds the biological optimum for satisfactory egg production. 3. Whilst there were no significant effects of illuminance in either the rearing period or laying periods on egg numbers, peak rate of lay, terminal rate of lay, egg mass output or liveability, meta-analyses of these and other data indicated biological optima of 15 lux during rearing and 7 lux in the laying period. Birds reared at 45 lux had a lower mean egg weight (and earlier sexual maturity) than birds reared at 15 lux, and hens illuminated at 25 lux in the laying period laid more eggs on the floor than at either 55 or 70 lux. 4. Typical p...

  • Broiler Breeders should not be reared on long photoperiods
    South African Journal of Animal Science, 2007
    Co-Authors: P. D. Lewis, R. M. Gous
    Abstract:

    Sexual maturity is delayed and egg numbers are reduced when Broiler Breeders are reared on long photoperiods. However, this is the recommended procedure for rearing spring-hatched birds in nonlightproof buildings. Research at the University of KwaZulu-Natal has suggested that this advice may be incorrect, and that precocity is not a problem in control-fed Broiler Breeders reared on increasing daylengths. This trial compared the responses of four Broiler breeder genotypes to a typical lighting programme advocated for birds in lightproof housing with the provision of 14-h photoperiods to 20 weeks and 16 h in lay. The long-day rearing resulted in a 26-d delay in sexual maturation, seven fewer eggs to 60 weeks, a 2.5-g increase in egg weight, less efficient feed conversion, heavier body weights at sexual maturity and throughout the laying period, and a higher incidence of mortality. It is concluded, therefore, that Broiler Breeders should not be reared on long photoperiods, even when hatched in the spring and kept in nonlightproof facilities, because of the adverse consequences of a delay in the dissipation of photorefractoriness.

  • model to predict age at sexual maturity in Broiler Breeders given a single increment in photoperiod
    British Poultry Science, 2007
    Co-Authors: P. D. Lewis, R. M. Gous, T R Morris
    Abstract:

    1. Data from 9 experiments in which Broiler breeder pullets had been photostimulated at two or more ages were integrated to produce a model to predict age at 50% egg production following a single increase in photoperiod during rearing. 2. It was clear that the photosexual response in Broiler Breeders was strongly influenced by the feed allowance and hence the rate of prepubertal growth. Regressions for birds given either a constant photoperiod or a single increase indicated that mean age at 50% lay advances by 2 d for every 100-g increase in body weight at 20 weeks. 3. The general response of Broiler Breeders was similar to that previously reported for egg-type pullets, but with important changes in the ages at which the birds progressed from one physiological state to the next, depending on body weight. 4. Broiler Breeders, unlike modern egg-type pullets, exhibit juvenile photorefractoriness and, depending on their body weight, require up to 20 weeks to dissipate this (faster growth allows quicker dissipation). As a consequence, a group of birds grown to a typical weight of 2.1 kg at 20 weeks do not start to be photoresponsive until about 10 weeks and are not uniformly responsive until 19 or 20 weeks. A transfer to a stimulatory photoperiod before a bird has dissipated photorefractoriness causes a delay of about 3 weeks in its sexual development, and this results in a bimodal distribution of ages at maturity when a flock is photostimulated between 10 and 20 weeks. 5. Once photosensitive, the response of Broiler Breeders to an increment in photoperiod is between 0.50 and 0.65 of that observed in ISA Brown egg-type pullets. However, a flock of Broiler Breeders with typical feed restriction starts to mature spontaneously under the influence of the initial photoperiod from about 25 weeks. 6. There is a difference of only 1 to 3 d in age at 50% egg production between a flock transferred to 11 or 12 h followed by further increases to 15 or 16 h and one increased abruptly to one of these photoperiods, and so this model can be used to predict maturity in a commercial flock of birds even though they are likely to be given a stepped, rather than a single, increase in photoperiod.

  • Abrupt or gradual increases in photoperiod for Broiler Breeders
    South African Journal of Animal Science, 2006
    Co-Authors: P. D. Lewis, R. M. Gous
    Abstract:

    Cobb 500 Broiler breeder females (n = 832), which had been raised to achieve a typical 20-week body weight of 2.1 kg, were subjected to an abrupt or gradual increase in photoperiod to determine the effects on reproductive performance. One group (n = 416) was reared on 8-h photoperiods till 19 weeks and abruptly transferred to 16-h photoperiods. Another group (n = 416) was reared on 8-h photoperiods and given an initial increase to 12 h at 19 weeks, then weekly increments of 1 h to reach 16 h at 23 weeks. Both groups were reared in light-proofed facilities to 23 weeks and then moved to curtain-sided housing and maintained on 16-h daylengths to 60 weeks. There were no significant differences between the two lighting groups for age at sexual maturity, total egg production, egg mass output, mean egg weight to or body weight at 60 weeks. However, the birds given a single abrupt increment had a higher peak rate of lay whilst those given a gradual increase in daylength had better egg production at the end of the laying cycle. Broiler Breeders transferred from closed rearing to curtain-sided adult accommodation (similar to that in which a large proportion of Broiler Breeders are housed) respond similarly to abrupt and gradual increases in daylength as do birds maintained throughout in controlled environment accommodation, and modern genotypes have similar responses to early genotypes.

Yongxia Wang - One of the best experts on this subject based on the ideXlab platform.

  • Effects of Different Forms and Levels of Selenomethionine on Productive Performance and Antioxidant Status of Broiler Breeders and Its Offspring
    Biological Trace Element Research, 2019
    Co-Authors: Ruoxi Zhao, Jiangshui Wang, Rujuan Wu, Kaixuan Li, Yongxia Wang, Xiuan Zhan
    Abstract:

    This study was conducted to investigate the effects of different selenomethionine (SM) forms and levels on productive performance and antioxidant status of Broiler Breeders and its offspring. Four hundred eighty 48-week-old Lingnan Yellow Broiler Breeders were randomly divided into four groups, provided basal diet with 0.15 or 0.30 mg/kg Se coming from two SM forms of dl -SM and l -SM. The experiment included a 4-week pretreatment period and an 8-week trial period. During the trial period, eggs were incubated once a week under standard conditions. The Broiler Breeders were slaughtered after the trial period. At the same time, 15 1-day-old chicks were selected at random per replicate and killed. The results showed that different SM forms and levels had no significant differences in average egg weight, feed intake, and feed-to-egg ration. The dl -SM group in contrast to the l -SM group induced a notable elevation of glutathione peroxidase (GPx) activity in serum ( P  

  • effects of different selenium sources and levels on antioxidant status in Broiler Breeders
    Asian-australasian Journal of Animal Sciences, 2018
    Co-Authors: J S Wang, Yongxia Wang, D Yuan, R X Zhao, Xiaoli Zhan
    Abstract:

    OBJECTIVE This study was conducted with the objectives to examine the impacts of inorganic selenium (Se) and different types and levels of organic selenium on the serum and tissues Se status and antioxidant capacity in Broiler Breeders. METHODS Five hundred and forty 48-wk-old Lingnan Yellow Broiler Breeders were randomly assigned to 6 dietary treatments, provided same basal diet (0.04 mg/kg of Se) with 0.15 mg/kg, or 0.30 mg/kg of Se from sodium selenite (SS) or from selenium-enriched yeast (SY) or from selenomethionine (SM). The Broiler Breeders were slaughtered after an 8-wk experiment. RESULTS The results showed that SM was better than SY and SS, 0.30 mg/kg level was better than 0.15 mg/kg level in Se deposition (p<0.05) in serum, liver, kidney, pancreas and muscle; in antioxidant status, organic selenium had better effects than SS in Broiler Breeders (p<0.05), but SM and SY had a similar result, and 0.15 mg/kg level was better than 0.30 mg/kg (p<0.05). CONCLUSION The results demonstrated the evident advantage of supplementation of Broiler Breeders with 0.15 mg/kg SM, which improved tissue Se concentrations and antioxidant status, and can be considered as the best selenium source.

  • Effects of different selenium sources and levels on antioxidant status in Broiler Breeders
    Asian-Australasian journal of animal sciences, 2018
    Co-Authors: J S Wang, Yongxia Wang, D Yuan, R X Zhao, Xiaoli Zhan
    Abstract:

    OBJECTIVE This study was conducted with the objectives to examine the impacts of inorganic selenium (Se) and different types and levels of organic selenium on the serum and tissues Se status and antioxidant capacity in Broiler Breeders. METHODS Five hundred and forty 48-wk-old Lingnan Yellow Broiler Breeders were randomly assigned to 6 dietary treatments, provided same basal diet (0.04 mg/kg of Se) with 0.15 mg/kg, or 0.30 mg/kg of Se from sodium selenite (SS) or from selenium-enriched yeast (SY) or from selenomethionine (SM). The Broiler Breeders were slaughtered after an 8-wk experiment. RESULTS The results showed that SM was better than SY and SS, 0.30 mg/kg level was better than 0.15 mg/kg level in Se deposition (p

  • effects of zinc glycinate on productive and reproductive performance zinc concentration and antioxidant status in Broiler Breeders
    Biological Trace Element Research, 2017
    Co-Authors: Ling Zhang, Jiangshui Wang, Yongxia Wang, Xue Xiao, Qian Wang, Tianyu Guo, Xiuan Zhan
    Abstract:

    An experiment was conducted to investigate the effects of zinc glycinate (Zn-Gly) supplementation as an alternative for zinc sulphate (ZnSO4) on productive and reproductive performance, zinc (Zn) concentration and antioxidant status in Broiler Breeders. Six hundred 39-week-old Lingnan Yellow Broiler Breeders were randomly assigned to 6 groups consisting of 4 replicates with 25 birds each. Breeders were fed a basal diet (control group, 24 mg Zn/kg diet), basal diet supplemented with 80 mg Zn/kg diet from ZnSO4 or basal diet supplemented with 20, 40, 60 and 80 mg Zn/kg diet from Zn-Gly. The experiment lasted for 8 weeks after a 4-week pre-test with the basal diet, respectively. Results showed that Zn supplementation, regardless of sources, improved (P < 0.05) the feed conversion ratio (kilogram of feed/kilogram of egg) and decreased broken egg rate, and elevated (P < 0.05) the qualified chick rate. Compared with the ZnSO4 group, the 80 mg Zn/kg Zn-Gly group significantly increased (P < 0.05) average egg weight, fertility, hatchability and qualified chick rate, whereas it decreased (P < 0.05) broken egg rate. The Zn concentrations in liver and muscle were significantly higher (P < 0.05) in 80 mg Zn/kg Zn-Gly group than that in ZnSO4 group. Compared with ZnSO4 group, 80 mg Zn/kg Zn-Gly group significantly elevated (P < 0.05) the mRNA abundances of metallothionein (MT) and copper-zinc superoxide (Cu-Zn SOD), as well as the Cu-Zn SOD activity and MT concentration in liver. Moreover, the 80 mg Zn/kg Zn-Gly group had higher (P < 0.05) serum T-SOD and Cu-Zn SOD activities than that in the ZnSO4 group. This study indicated that supplementation of Zn in basal diet improved productive and reproductive performance, Zn concentration and antioxidant status in Broiler Breeders, and the 80 mg Zn/kg from Zn-Gly was the optimum choice for Broiler Breeders compared with other levels of Zn from Zn-Gly and 80 mg/kg Zn from ZnSO4.

  • effects of different methionine sources on production and reproduction performance egg quality and serum biochemical indices of Broiler Breeders
    Asian-australasian Journal of Animal Sciences, 2016
    Co-Authors: Xue Xiao, Yongxia Wang, Weilong Liu, Xiuan Zhan
    Abstract:

    OBJECTIVE The study was conducted to evaluate the effects of different methionine (Met) sources on production performance, reproduction performance, egg quality and serum biochemical indices in Broiler Breeders. METHODS After receiving a basal diet (containing 0.25% Met) for a 2-wk pretreatment period, a total of 360 39-wk-old Lingnan yellow Broiler Breeders were randomly allocated to four treatments with six replicates each (15 birds per replicate). Breeders were fed with basal diets (control) or diets supplemented with DL-methionine (DLM), DL-2-hydroxy-4-methylthio butytric calcium (MHA-Ca) and coated DL-Met (CME) respectively. RESULTS The results showed that CME supplementation promoted laying rate and decreased feed-to-egg ratio (F/E) (p<0.05), DLM and MHA-Ca supplementation decreased F/E (p<0.05) when compared with control group. The rate of fertility, hatchability and birthrate were higher (p<0.05) in DLM, MHA-Ca, and CME groups than control group. Compared with control group, CME increased the eggshell thickness (p<0.05); MHA-Ca improved the eggshell thickness, shell ratio and eggshell strength (p<0.05). Results also showed that CME elevated the concentration of total protein in serum (p<0.05); MHA-Ca improved the concentration of calcium in serum (p<0.05). The concentration of serum uric acid in DLM, MHA-Ca, and CME groups was lower than that in control group (p<0.05). Besides, CME had higher concentrations of serum taurine, cysteine and cystanthionine (p<0.05) while MHA-Ca and DLM promoted the serum taurine concentration (p<0.05) compared with control group. CONCLUSION Based on the results, it was concluded that Met supplementation could enhance the production and reproduction performance as well as the antioxidant status and egg quality of Broiler Breeders. In terms of improving the production performance, reproduction performance and antioxidant performance, CME was superior to DLM and MHA-Ca; but in regard to the enhancement of eggshell quality and serum Ca concentration, MHA-Ca was superior to DLM and CME.

Xiuan Zhan - One of the best experts on this subject based on the ideXlab platform.

  • Effects of Different Forms and Levels of Selenomethionine on Productive Performance and Antioxidant Status of Broiler Breeders and Its Offspring
    Biological Trace Element Research, 2019
    Co-Authors: Ruoxi Zhao, Jiangshui Wang, Rujuan Wu, Kaixuan Li, Yongxia Wang, Xiuan Zhan
    Abstract:

    This study was conducted to investigate the effects of different selenomethionine (SM) forms and levels on productive performance and antioxidant status of Broiler Breeders and its offspring. Four hundred eighty 48-week-old Lingnan Yellow Broiler Breeders were randomly divided into four groups, provided basal diet with 0.15 or 0.30 mg/kg Se coming from two SM forms of dl -SM and l -SM. The experiment included a 4-week pretreatment period and an 8-week trial period. During the trial period, eggs were incubated once a week under standard conditions. The Broiler Breeders were slaughtered after the trial period. At the same time, 15 1-day-old chicks were selected at random per replicate and killed. The results showed that different SM forms and levels had no significant differences in average egg weight, feed intake, and feed-to-egg ration. The dl -SM group in contrast to the l -SM group induced a notable elevation of glutathione peroxidase (GPx) activity in serum ( P  

  • effects of zinc glycinate on productive and reproductive performance zinc concentration and antioxidant status in Broiler Breeders
    Biological Trace Element Research, 2017
    Co-Authors: Ling Zhang, Jiangshui Wang, Yongxia Wang, Xue Xiao, Qian Wang, Tianyu Guo, Xiuan Zhan
    Abstract:

    An experiment was conducted to investigate the effects of zinc glycinate (Zn-Gly) supplementation as an alternative for zinc sulphate (ZnSO4) on productive and reproductive performance, zinc (Zn) concentration and antioxidant status in Broiler Breeders. Six hundred 39-week-old Lingnan Yellow Broiler Breeders were randomly assigned to 6 groups consisting of 4 replicates with 25 birds each. Breeders were fed a basal diet (control group, 24 mg Zn/kg diet), basal diet supplemented with 80 mg Zn/kg diet from ZnSO4 or basal diet supplemented with 20, 40, 60 and 80 mg Zn/kg diet from Zn-Gly. The experiment lasted for 8 weeks after a 4-week pre-test with the basal diet, respectively. Results showed that Zn supplementation, regardless of sources, improved (P < 0.05) the feed conversion ratio (kilogram of feed/kilogram of egg) and decreased broken egg rate, and elevated (P < 0.05) the qualified chick rate. Compared with the ZnSO4 group, the 80 mg Zn/kg Zn-Gly group significantly increased (P < 0.05) average egg weight, fertility, hatchability and qualified chick rate, whereas it decreased (P < 0.05) broken egg rate. The Zn concentrations in liver and muscle were significantly higher (P < 0.05) in 80 mg Zn/kg Zn-Gly group than that in ZnSO4 group. Compared with ZnSO4 group, 80 mg Zn/kg Zn-Gly group significantly elevated (P < 0.05) the mRNA abundances of metallothionein (MT) and copper-zinc superoxide (Cu-Zn SOD), as well as the Cu-Zn SOD activity and MT concentration in liver. Moreover, the 80 mg Zn/kg Zn-Gly group had higher (P < 0.05) serum T-SOD and Cu-Zn SOD activities than that in the ZnSO4 group. This study indicated that supplementation of Zn in basal diet improved productive and reproductive performance, Zn concentration and antioxidant status in Broiler Breeders, and the 80 mg Zn/kg from Zn-Gly was the optimum choice for Broiler Breeders compared with other levels of Zn from Zn-Gly and 80 mg/kg Zn from ZnSO4.

  • effects of different methionine sources on production and reproduction performance egg quality and serum biochemical indices of Broiler Breeders
    Asian-australasian Journal of Animal Sciences, 2016
    Co-Authors: Xue Xiao, Yongxia Wang, Weilong Liu, Xiuan Zhan
    Abstract:

    OBJECTIVE The study was conducted to evaluate the effects of different methionine (Met) sources on production performance, reproduction performance, egg quality and serum biochemical indices in Broiler Breeders. METHODS After receiving a basal diet (containing 0.25% Met) for a 2-wk pretreatment period, a total of 360 39-wk-old Lingnan yellow Broiler Breeders were randomly allocated to four treatments with six replicates each (15 birds per replicate). Breeders were fed with basal diets (control) or diets supplemented with DL-methionine (DLM), DL-2-hydroxy-4-methylthio butytric calcium (MHA-Ca) and coated DL-Met (CME) respectively. RESULTS The results showed that CME supplementation promoted laying rate and decreased feed-to-egg ratio (F/E) (p<0.05), DLM and MHA-Ca supplementation decreased F/E (p<0.05) when compared with control group. The rate of fertility, hatchability and birthrate were higher (p<0.05) in DLM, MHA-Ca, and CME groups than control group. Compared with control group, CME increased the eggshell thickness (p<0.05); MHA-Ca improved the eggshell thickness, shell ratio and eggshell strength (p<0.05). Results also showed that CME elevated the concentration of total protein in serum (p<0.05); MHA-Ca improved the concentration of calcium in serum (p<0.05). The concentration of serum uric acid in DLM, MHA-Ca, and CME groups was lower than that in control group (p<0.05). Besides, CME had higher concentrations of serum taurine, cysteine and cystanthionine (p<0.05) while MHA-Ca and DLM promoted the serum taurine concentration (p<0.05) compared with control group. CONCLUSION Based on the results, it was concluded that Met supplementation could enhance the production and reproduction performance as well as the antioxidant status and egg quality of Broiler Breeders. In terms of improving the production performance, reproduction performance and antioxidant performance, CME was superior to DLM and MHA-Ca; but in regard to the enhancement of eggshell quality and serum Ca concentration, MHA-Ca was superior to DLM and CME.

  • Regulation of selenoprotein P concentration and expression by different sources of selenium in Broiler Breeders and their offspring
    Poultry science, 2013
    Co-Authors: D Yuan, Yongxia Wang, Liangrong Zheng, Guo Xiuyun, Xiuan Zhan
    Abstract:

    Abstract An 8-wk experiment using 180 Lingnan Yellow Broiler Breeders was conducted to investigate the effect of different sources of Se on the concentration and gene expression of selenoprotein P (SEPP1) in Broiler Breeders and their offspring. After receiving a low-Se basal diet for 8 wk, Broiler Breeders were randomly allocated to 3 treatments (6 replicates per treatment) and fed corn-soy-based diets supplemented with 0.15 mg/kg of Se from sodium selenite (SS), Se-enriched yeast (SY), and selenomethionine (SM), respectively. Fertile eggs from different replicates were collected during the last week of the experiment and then incubated in different incubator trays in the same incubator. The concentrations and mRNA levels of SEPP1 were determined in liver and kidney of Broiler Breeders and their offspring, as well as the serum SEPP1 concentration. Compared with SS, both SY and SM significantly increased (P

  • effect of selenium sources on the expression of cellular glutathione peroxidase and cytoplasmic thioredoxin reductase in the liver and kidney of Broiler Breeders and their offspring
    Poultry Science, 2012
    Co-Authors: D Yuan, Xiuan Zhan, Yongxia Wang
    Abstract:

    Abstract In total, 180 Lingnan Yellow Broiler Breeders were used to investigate the effect of different sources of selenium (Se) on the expression of cellular glutathione peroxidase (GPx1) and cytoplasmic thioredoxin reductase (TrxR1) in the liver and kidney of Broiler Breeders and their offspring by quantitative real-time PCR. There were 6 replicates of 3 dietary treatments. Broiler Breeders were fed corn-soy-based diets supplemented with 0.15 mg/kg of Se from sodium selenite, Se-enriched yeast (SY), or selenomethionine (SM). At the end of the feeding trial, liver and kidney mRNA levels of GPx1 and TrxR1 were determined by quantitative real-time PCR, as well as the activity of GPx1 and TrxR1 in liver and kidney of Breeders and their offspring. The results showed that, compared with sodium selenite, SY or SM significantly increased (P

Yongwen Zhu - One of the best experts on this subject based on the ideXlab platform.

  • effects of environmental temperature and dietary zinc on egg production performance egg quality and antioxidant status and expression of heat shock proteins in tissues of Broiler Breeders
    British Journal of Nutrition, 2018
    Co-Authors: Xiudong Liao, Liyang Zhang, Xi Lin, Yongwen Zhu, Xugang Luo
    Abstract:

    To investigate the effects of environmental temperature and dietary Zn on egg production performance, egg quality and antioxidant status, as well as expression of heat-shock proteins (HSP) in tissues, of laying Broiler Breeders, we used a completely randomised design with a 2×3 factorial arrangement of treatments. The two environmental temperatures were normal (21±1°C, NT) and high (32±1°C, HT). The three dietary Zn sources were a Zn-unsupplemented basal diet (CON), and the basal diet supplemented with 110 mg Zn/kg as either the inorganic Zn sulphate (iZn) or the organic Zn proteinate with a moderate chelation strength (oZn). HT decreased (P<0·002) egg weight, laying rate, eggshell strength, thickness and weight, but increased (P≤0·05) rectal temperature, broken egg rate, misshapen egg rate, feed:egg ratio, Cu Zn superoxide dismutase activities in liver and pancreas, as well as metallothionein (MT) level in pancreas, and HSP70 mRNA levels in liver and pancreas of laying Broiler Breeders. Broiler Breeders fed the oZn diet had higher (P<0·04) Zn content in the liver, as well as MT levels in the liver and pancreas, compared with those fed the CON diet. Under HT, Broiler Breeders fed the oZn diet had higher (P<0·05) Zn content in the pancreas compared with those fed the iZn and CON diets. The results from this study indicated that HT impaired egg production performance and eggshell quality possibly because of the disturbed redox balance and HSP homoeostasis, whereas the oZn is more available than the iZn for pancreatic Zn of heat-stressed laying Broiler Breeders.

  • effect of dietary manganese on antioxidant status and expressions of heat shock proteins and factors in tissues of laying Broiler Breeders under normal and high environmental temperatures
    British Journal of Nutrition, 2015
    Co-Authors: Yongwen Zhu, Liyang Zhang, Xi Lin, Hsiaoching Liu, Jack Odle, Xugang Luo
    Abstract:

    To investigate the effect of Mn on antioxidant status and expression levels of heat-shock proteins/factors in tissues of laying Broiler Breeders subjected to heat challenge, we used a completely randomised design (n 6) with a factorial arrangement of 2 environmental temperatures (normal, 21 (sem 1)°C and high, 32 (sem 1)°C)×3 dietary Mn treatments (an Mn-unsupplemented basal diet (CON), or a basal diet supplemented with 120 mg Mn/kg diet as inorganic Mn sulphate (iMn) or organic Mn proteinate (oMn)). There were no interactions (P>0·10) between environmental temperature and dietary Mn in all of the measured indices. High temperature decreased (P<0·003) Mn content, and also tended (P=0·07) to decrease copper zinc superoxide dismutase (CuZnSOD) activity in the liver and heart. However, an increased manganese superoxide dismutase (MnSOD) activity (P<0·05) and a slight increase of malondialdehyde level (P=0·06) were detected in breast muscle. Up-regulated (P<0·05) expression levels of heat-shock factor 1 (HSF1) and HSF3 mRNA and heat-shock protein 70 (HSP70) mRNA and protein were found in all three tissues. Broiler Breeders fed either iMn or oMn had higher tissue Mn content (P<0·0001), heart MnSOD and CuZnSOD activities (P<0·01) and breast muscle MnSOD protein levels (P<0·05), and lower (P<0·05) breast muscle HSP70 mRNA and protein levels than those fed CON. Broiler Breeders fed oMn had higher (P<0·03) bone Mn content than those fed iMn. These results indicate that high temperature decreases Mn retention and increases HSP70 and HSF1, HSF3 expression levels in tissues of laying Broiler Breeders. Furthermore, dietary supplementation with Mn in either source may enhance heart antioxidant ability and inhibit the expression of HSP70 in breast muscle. Finally, the organic Mn appears to be more available than inorganic Mn for bone in laying Broiler Breeders regardless of environmental temperatures.

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