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A D Herring - One of the best experts on this subject based on the ideXlab platform.

  • of Angus gray brahman gir indu brazil nellore and red brahman sired f1 calves
    2011
    Co-Authors: J C Paschal, J L Herr, D K Lunts, A D Herring
    Abstract:

    Postweaning, feedlot, and carcass data from crossbred calves sired by five Bos indicus breeds and one Bos taurus breed were evaluated. Data included records from F1 calves out of multiparous Hereford cows sired by Angus, Gray Brahman, Gir, Indu-Brazil, Nellore, and Red Brahman bulls. The Zebu crosses grew faster postweaning and were heavier and taller as yearlings than the Angus crosses ( P < .05). Among the Zebu-sired calves, the Red and Gray Brahman crosses were faster gaining and were heavier at a year of age than the Gir, Indu-Brazil, and Nellore. The Nellore crosses were significantly taller than the Gray Brahman- and Gir-sired crosses; the Indu-Brazil and Red Brahman were intermediate. Angus crosses were lightest on and off feed but were not significantly different from Gir, and Red and Gray Brahman were heaviest (P < .05). The Nellore and Indu-Brazil were similar in initial weight, but Indu- Brazil calves were similar to Red and Gray Brahman for final weight. The Angus cross was more desirable

  • postweaning and feedlot growth and carcass characteristics of Angus gray brahman gir indu brazil nellore and red brahman sired f1 calves
    Journal of Animal Science, 1995
    Co-Authors: J C Paschal, J O Sanders, J L Kerr, D K Lunt, A D Herring
    Abstract:

    Postweaning, feedlot, and carcass data from crossbred calves sired by five Bos indicus breeds and one Bos taurus breed were evaluated. Data included records from F 1 calves out of multiparous Hereford cows sired by Angus, Gray Brahman, Gir, Indu-Brazil, Nellore, and Red Brahman bulls. The Zebu crosses grew faster postweaning and were heavier and taller as yearlings than the Angus crosses (P<.05). Among the Zebu-sired calves, the Red and Gray Brahman crosses were faster gaining and were heavier at a year of age than the Gir, Indu-Brazil, and Nellore. The Nellore crosses were significantly taller than the Gray Brahman- and Gir-sired crosses; the Indu-Brazil and Red Brahman were intermediate. Angus crosses were lightest on and off feed but were not significantly different from Gir, and Red and Gray Brahman were heaviest (P<.05). The Nellore and Indu-Brazil were similar in initial weight, but InduBrazil calves were similar to Red and Gray Brahman for final weight. The Angus cross was more desirable (P<.05) in marbling score and quality grade, although the Nellore crosses had the most desirable score and grade of the Zebu crosses. Gir crosses had higher skeletal maturity scores (P<.05) than Nellore, Gray Brahman, Indu-Brazil, and Angus crosses; Red Brahman crosses were intermediate. Angus crosses had the lightest carcasses but not significantly lighter than the Indu-Brazil, Gir, or Nellore. Red Brahman-cross carcasses were heaviest and Gray Brahman-cross carcasses were intermediate. Gir crosses had the greatest actual fat thickness, but Nellore and Angus were not significantly different. Yield grade was lowest for Indu-Brazil but not significantly different from Angus. The Red and Gray Brahman crosses had the highest yield grades, and Nellore and Gir were intermediate. These results indicate that no major differences exist among these Zebu breed crosses in carcass quality or yield characteristics

J C Paschal - One of the best experts on this subject based on the ideXlab platform.

  • of Angus gray brahman gir indu brazil nellore and red brahman sired f1 calves
    2011
    Co-Authors: J C Paschal, J L Herr, D K Lunts, A D Herring
    Abstract:

    Postweaning, feedlot, and carcass data from crossbred calves sired by five Bos indicus breeds and one Bos taurus breed were evaluated. Data included records from F1 calves out of multiparous Hereford cows sired by Angus, Gray Brahman, Gir, Indu-Brazil, Nellore, and Red Brahman bulls. The Zebu crosses grew faster postweaning and were heavier and taller as yearlings than the Angus crosses ( P < .05). Among the Zebu-sired calves, the Red and Gray Brahman crosses were faster gaining and were heavier at a year of age than the Gir, Indu-Brazil, and Nellore. The Nellore crosses were significantly taller than the Gray Brahman- and Gir-sired crosses; the Indu-Brazil and Red Brahman were intermediate. Angus crosses were lightest on and off feed but were not significantly different from Gir, and Red and Gray Brahman were heaviest (P < .05). The Nellore and Indu-Brazil were similar in initial weight, but Indu- Brazil calves were similar to Red and Gray Brahman for final weight. The Angus cross was more desirable

  • postweaning and feedlot growth and carcass characteristics of Angus gray brahman gir indu brazil nellore and red brahman sired f1 calves
    Journal of Animal Science, 1995
    Co-Authors: J C Paschal, J O Sanders, J L Kerr, D K Lunt, A D Herring
    Abstract:

    Postweaning, feedlot, and carcass data from crossbred calves sired by five Bos indicus breeds and one Bos taurus breed were evaluated. Data included records from F 1 calves out of multiparous Hereford cows sired by Angus, Gray Brahman, Gir, Indu-Brazil, Nellore, and Red Brahman bulls. The Zebu crosses grew faster postweaning and were heavier and taller as yearlings than the Angus crosses (P<.05). Among the Zebu-sired calves, the Red and Gray Brahman crosses were faster gaining and were heavier at a year of age than the Gir, Indu-Brazil, and Nellore. The Nellore crosses were significantly taller than the Gray Brahman- and Gir-sired crosses; the Indu-Brazil and Red Brahman were intermediate. Angus crosses were lightest on and off feed but were not significantly different from Gir, and Red and Gray Brahman were heaviest (P<.05). The Nellore and Indu-Brazil were similar in initial weight, but InduBrazil calves were similar to Red and Gray Brahman for final weight. The Angus cross was more desirable (P<.05) in marbling score and quality grade, although the Nellore crosses had the most desirable score and grade of the Zebu crosses. Gir crosses had higher skeletal maturity scores (P<.05) than Nellore, Gray Brahman, Indu-Brazil, and Angus crosses; Red Brahman crosses were intermediate. Angus crosses had the lightest carcasses but not significantly lighter than the Indu-Brazil, Gir, or Nellore. Red Brahman-cross carcasses were heaviest and Gray Brahman-cross carcasses were intermediate. Gir crosses had the greatest actual fat thickness, but Nellore and Angus were not significantly different. Yield grade was lowest for Indu-Brazil but not significantly different from Angus. The Red and Gray Brahman crosses had the highest yield grades, and Nellore and Gir were intermediate. These results indicate that no major differences exist among these Zebu breed crosses in carcass quality or yield characteristics

D K Lunt - One of the best experts on this subject based on the ideXlab platform.

  • lipogenesis and stearoyl coa desaturase gene expression and enzyme activity in adipose tissue of short and long fed Angus and wagyu steers fed corn or hay based diets
    Journal of Animal Science, 2007
    Co-Authors: K Y Chung, D K Lunt, Hiroyuki Kawachi, Hideo Yano, S B Smith
    Abstract:

    Angus and Wagyu steers consuming high-roughage diets exhibit large differences in adipose tissue fatty acid composition, but there are no differences in terminal measures of stearoyl-CoA desaturase (SCD) activity or gene expression. Also, adipose tissue lipids of cattle fed corn-based diets have greater MUFA:SFA ratios than cattle fed hay-based diets. We hypothesized that any changes in SCD gene expression and activity would precede similar changes in adipose tissue lipogenesis between short- and long-fed endpoints. Furthermore, changes in SCD activity and gene expression between production endpoints would differ between corn- and hay-fed steers and between Wagyu and Angus steers. Angus (n = 8) and Wagyu (n = 8) steers were fed a corn-based diet for 8 mo (short-fed; 16 mo of age) or 16 mo (long-fed; 24 mo of age), whereas another group of Angus (n = 8) and Wagyu (n = 8) steers was fed a hay-based diet for 12 mo (short-fed; 20 mo of age) or 20 mo (long-fed; 28 mo of age) to match the end point BW of the corn-fed steers. Acetate incorporation into lipids in vitro was greater (P < 0.01) in corn-fed steers than in hay-fed steers and tended (P = 0.06) to be greater in Wagyu than in Angus s.c. adipose tissue because the rate in Wagyu was twice that of Angus adipose tissue in the corn-fed, short-fed steers. There were diet x end point interactions for lipogenesis in i.m. and s.c. adipose tissues (both P < 0.01) because lipogenesis was 60 to 90% lower in the long-fed cattle than in short-fed cattle fed the corn-based diet. The greatest SCD enzyme activity in Angus s.c. adipose tissue was observed at 24 mo of age (corn-based diet), but activity in Wagyu adipose tissue was greatest at 28 mo of age (hay-based diet; breed x diet x end point interaction, P = 0.08). For short- vs. long-fed endpoints in Angus, s.c. adipose tissue SCD activity was less (hay diet) or the same (corn diet). Conversely, SCD gene expression was greatest in long-fed Wagyu steers fed the hay- or corn-based diets (breed x end point interaction; P < 0.01). Contrary to our hypotheses, SCD activity increased over time, whereas lipogenesis from acetate decreased. However, the developmental pattern of SCD gene expression and activity differed markedly between hay-fed Angus and Wagyu adipose tissues, which may explain the differences in the MUFA:SFA ratios observed in adipose tissues from these cattle.

  • postweaning and feedlot growth and carcass characteristics of Angus gray brahman gir indu brazil nellore and red brahman sired f1 calves
    Journal of Animal Science, 1995
    Co-Authors: J C Paschal, J O Sanders, J L Kerr, D K Lunt, A D Herring
    Abstract:

    Postweaning, feedlot, and carcass data from crossbred calves sired by five Bos indicus breeds and one Bos taurus breed were evaluated. Data included records from F 1 calves out of multiparous Hereford cows sired by Angus, Gray Brahman, Gir, Indu-Brazil, Nellore, and Red Brahman bulls. The Zebu crosses grew faster postweaning and were heavier and taller as yearlings than the Angus crosses (P<.05). Among the Zebu-sired calves, the Red and Gray Brahman crosses were faster gaining and were heavier at a year of age than the Gir, Indu-Brazil, and Nellore. The Nellore crosses were significantly taller than the Gray Brahman- and Gir-sired crosses; the Indu-Brazil and Red Brahman were intermediate. Angus crosses were lightest on and off feed but were not significantly different from Gir, and Red and Gray Brahman were heaviest (P<.05). The Nellore and Indu-Brazil were similar in initial weight, but InduBrazil calves were similar to Red and Gray Brahman for final weight. The Angus cross was more desirable (P<.05) in marbling score and quality grade, although the Nellore crosses had the most desirable score and grade of the Zebu crosses. Gir crosses had higher skeletal maturity scores (P<.05) than Nellore, Gray Brahman, Indu-Brazil, and Angus crosses; Red Brahman crosses were intermediate. Angus crosses had the lightest carcasses but not significantly lighter than the Indu-Brazil, Gir, or Nellore. Red Brahman-cross carcasses were heaviest and Gray Brahman-cross carcasses were intermediate. Gir crosses had the greatest actual fat thickness, but Nellore and Angus were not significantly different. Yield grade was lowest for Indu-Brazil but not significantly different from Angus. The Red and Gray Brahman crosses had the highest yield grades, and Nellore and Gir were intermediate. These results indicate that no major differences exist among these Zebu breed crosses in carcass quality or yield characteristics

T A Olson - One of the best experts on this subject based on the ideXlab platform.

  • evaluation of birth and weaning traits of romosinuano calves as purebreds and crosses with brahman and Angus
    Journal of Animal Science, 2007
    Co-Authors: David G. Riley, C. C. Chase, S W Coleman, T A Olson
    Abstract:

    The objectives of this work were to evaluate birth and weaning traits, to estimate genetic effects, including heterosis and direct and maternal breed effects, and to evaluate calving difficulty, calf vigor at birth, and calf mortality of Romosinuano as purebreds and as crosses with Brahman and Angus. Calves (n = 1,348) were spring-born from 2002 through 2005 and weaned in the fall of each year at about 7 mo of age. Traits evaluated included birth and weaning weight, ADG, BCS, and weaning hip height. Models used to analyze these traits included the fixed effects of year, sire and dam breeds, management unit, calf sex, cow age, and source of Angus sire (within or outside of the research herd). Calf age in days was investigated as a covariate for weaning traits. Sire within sire breed and dam within dam breed were random effects. Estimates of Romosinuano-Brahman and Romosinuano-Angus heterosis (P < 0.05) were 2.6 + 0.3 (8.6%) and 1.4 ± 0.3 kg (4.7%) for birth weight, 20.5 ± 1.5 (9.5%) and 14.6 ± 1.4 kg (7.4%) for weaning weight, 79.2 ± 6.1 (9.8%) and 55.1 ± 6.0 g (7.5%) for ADG, 0.16 ± 0.03 (2.7%) and 0.07 ± 0.03 (1.2%) for BCS, and 2.77 ± 0.32 cm (2.4%) and 1.87 + 0.32 cm (1.7%) for hip height. Heterosis for Brahman-Angus was greater (P < 0.05) than all Romosinuano estimates except those for Romosinuano-Brahman and Romosinuano-Angus BCS. Romosinuano direct effects were negative and lowest of the breeds, except for the Angus estimate for hip height. Romosinuano maternal effects were the largest of the 3 breeds for birth weight and hip height but intermediate to the other breeds for weaning weight and ADG. A large proportion of Brahman-sired calves from Angus dams (0.09 + 0.03; n = 11) was born in difficult births and died before 4 d of age. Brahman and Angus purebreds and Romosinuano-sired calves from Brahman dams also had large proportions of calves that died before weaning (0.09 or greater). Results indicated that Romosinuano may be used as a source of adaptation to subtropical environments and still incorporate substantial crossbred advantage for weaning traits, although not to the extent of crosses of Brahman and Angus.

  • ovarian and endocrine characteristics during an estrous cycle in Angus brahman and senepol cows in a subtropical environment
    Journal of Animal Science, 2000
    Co-Authors: P Alvarez, A. C. Hammond, T A Olson, Christopher C L Chase, L J Spicer, Mark E Payton, T D Hamilton, R E Stewart, R P Wettemann
    Abstract:

    To determine breed differences in ovarian function and endocrine secretion, daily rectal ultrasonography was conducted on multiparous lactating Angus (temperate Bos taurus; n = 12), Brahman (tropical Bos indicus; n = 12), and Senepol (tropical Bos taurus; n = 12) cows during an estrous cycle in summer. Blood was collected daily to quantify plasma concentrations of FSH, LH, progesterone, estradiol, GH, insulin-like growth factor (IGF)-I, IGF-II, IGF binding proteins (IGFBP), insulin, glucose, and plasma urea nitrogen (PUN). Numbers of small (2 to 5 mm), medium (6 to 8 mm), and large follicles (≥ 9 mm) were greater (P .10) among Senepol (20.4 d), Angus (19.5 d), and Brahman (19.7 d) cows. Senepol cows had greater (P .10) among breeds. Concentrations of GH, IGF-I, insulin, and PUN were greater (P <.001) and binding activities of the 22-kDa and 20-kDa IGFBP tended (P <.10) to be greater in plasma of Brahman than in Angus or Senepol cows. Plasma glucose concentrations were greater (P <.05) in Senepol than in Brahman or Angus cows. In conclusion, Brahman (Bos indicus) and Senepol cows (tropical Bos taurus) had greater numbers of follicles in all size categories and greater diameter of CL than Angus (temperate Bos taurus) cows. These ovarian differences may be due to changes in the pattern of secretion of FSH, insulin, IGF-I, and GH but not LH, IGF-II, or IGFBP-2 or -3.

  • heat tolerance in two tropically adapted bos taurus breeds senepol and romosinuano compared with brahman Angus and hereford cattle in florida
    Journal of Animal Science, 1996
    Co-Authors: A. C. Hammond, C. C. Chase, D W Vogt, Clifton N. Murphy, T A Olson, E J Bowers, R D Randel, Assefaw Tewolde
    Abstract:

    Two trials were conducted with heif- ers to determine heat tolerance among temperate Bos taurus (Angus, Hereford), Bos indicus (Brahman), tropical Bos taurus (Senepol, Romosinuano), and the reciprocal crosses of Hereford and Senepol. Differences among breeds in temperament score, circulating concentrations of cortisol, and blood packed cell volume were also investigated. Trial 1 used 43 Angus, 28 Brahman, 12 Hereford, 23 Romosinuano, 16 Senepol, 5 Hereford × Senepol (H × S), and 5 Senepol × Hereford (S × H) heifers. Trial 2 used 36 Angus, 31 Brahman, 9 Hereford, 14 Senepol, 19 H × S, and 10 S × H heifers. On the hottest summer date in Trial 1, rectal temperature of Angus was greater ( P < .001) than that of Brahman, Senepol, or Romosinuano. Rectal temperature and plasma cortisol were signifi- cantly less in Senepol than in Brahman, suggesting that the differences in rectal temperature between these breeds may be due to differences in stress response possibly related to differences in tempera- ment. Reciprocal crosses of Hereford and Senepol had rectal temperatures nearly as low as that of Senepol and displayed substantial heterosis ( -9.4%, P < .05) in log10 rectal temperature on the hottest summer date. On both the hottest and coolest dates in Trial 1, Angus heifers had significantly faster respiration rates than Brahman, Romosinuano, or Senepol heif- ers, and Brahman had significantly slower respiration rates than Romosinuano or Senepol. On the hottest summer date in Trial 2, rectal temperature in Angus heifers was greater ( P < .001) than in Brahman or Senepol heifers. Reciprocal crosses of Hereford and Senepol had rectal temperatures similar to that of Senepol, and heterosis for log 10 rectal temperature was similar to that in Trial 1 ( -9.8%, P < .05). Considering rank order among breeds, Brahman always had the slowest respiration rate and greatest packed cell volume. Brahman had significantly greater temperament scores and plasma cortisol concentra- tions than Angus or Senepol, except that plasma cortisol was not different between Brahman and Senepol on the hottest summer date. On this date, rectal temperature did not differ between Brahman and Senepol, which supports the hypothesis that there is a relationship between response to stress and rectal temperature that helps explain differences in rectal temperature between Brahman and Senepol. The results of these trials demonstrate heat tolerance of the Senepol and Romosinuano, two Bos taurus breeds. Furthermore, the results suggest a substantial level of dominance of the Senepol's ability to maintain con- stant body temperature in a hot environment as measured by rectal temperature in crosses with a non- adapted breed.

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