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Border Leicester

The Experts below are selected from a list of 111 Experts worldwide ranked by ideXlab platform

S N Mccutcheon – 1st expert on this subject based on the ideXlab platform

  • evaluation of Border Leicester romney br poll dorset br and suffolk br ewes for out of season lambing
    New Zealand Journal of Agricultural Research, 1993
    Co-Authors: S T Morris, H T Blair, W J Parker, S N Mccutcheon

    Abstract:

    Abstract Three different year groups of Border Leicester × Romney (BR), Poll Dorset × BR (PBR), and Suffolk × BR (SBR) ewes were evaluated for yearling liveweight and greasy fleece weight, and for their 2– and 3–year-old lambing performance under both June– and August-lambing policies. Mating of the June-lambing ewes was induced using progesterone treatment and high ram:ewe ratios. Suffolk × BR hoggets were significantly (P < 0.01) heavier than PBR and BR ewe hoggets in May, October, and January (at about 16 months of age). Border Leicester × Romney hoggets produced significantly (P < 0.01) more greasy wool at the yearling shearing than PBR or SBR hoggets. Lambing policy did not influence the proportion of ewes lambing but there were more (P < 0.05) multiple births in August-lambing ewes. Birth weights and weaning weights of June-born lambs were lower (P < 0.001) than those of their August-born counterparts. Weight of lamb weaned per ewe joined was 22.1 kg for June-lambing ewes and 24.3 kg for August-lamb...

  • Evaluation of Border Leicester × Romney (BR), Poll Dorset × BR, and Suffolk × BR ewes for out-of-season lambing
    New Zealand Journal of Agricultural Research, 1993
    Co-Authors: S T Morris, H T Blair, W J Parker, S N Mccutcheon

    Abstract:

    Abstract Three different year groups of Border Leicester × Romney (BR), Poll Dorset × BR (PBR), and Suffolk × BR (SBR) ewes were evaluated for yearling liveweight and greasy fleece weight, and for their 2– and 3–year-old lambing performance under both June– and August-lambing policies. Mating of the June-lambing ewes was induced using progesterone treatment and high ram:ewe ratios. Suffolk × BR hoggets were significantly (P < 0.01) heavier than PBR and BR ewe hoggets in May, October, and January (at about 16 months of age). Border Leicester × Romney hoggets produced significantly (P < 0.01) more greasy wool at the yearling shearing than PBR or SBR hoggets. Lambing policy did not influence the proportion of ewes lambing but there were more (P < 0.05) multiple births in August-lambing ewes. Birth weights and weaning weights of June-born lambs were lower (P < 0.001) than those of their August-born counterparts. Weight of lamb weaned per ewe joined was 22.1 kg for June-lambing ewes and 24.3 kg for August-lamb...

D O Kleemann – 2nd expert on this subject based on the ideXlab platform

  • positive effects of melatonin treatment on the reproductive performance of young Border Leicester rams mated to merino ewes in spring preliminary observations
    Reproduction in Domestic Animals, 2014
    Co-Authors: D O Kleemann, J M Kelly, L J Arney, I L Farley, A J Tilbrook, S K Walker

    Abstract:

    Contents Poor reproductive performance of Merino ewe flocks when mated to Border Leicester rams during spring may be due to seasonality of the Border Leicester breed. Two approaches were taken to test this assumption. Six young (12 months old) or six mixed-age (12, 24 and ≥36 months old) Border Leicester rams were either treated or not treated with melatonin implants (2 9 2 design) 6 weeks before the four groups of rams were each put with approximately 300 Merino ewes for an 8-week mating period. Implants were inserted in early September (experiment 1). The second approach was to yard or not yard ewes and mixed-age rams on several occasions during the first 3 weeks of the mating period (experiment 2). Pregnancy rate and twinning percentage were assessed by ultrasonography. In experiment 1, melatonin treatment in young rams increased (p 0.05) for ewes mated to either melatonin or non-melatonin-treated young rams (36.8% vs 40.0%, respectively), whereas melatonin significantly improved (p < 0.05) twinning rate in those ewes mated to mixed-age rams (49.1% vs 36.1%). After 6 weeks of melatonin treatment, scrotal circumference was greater (p < 0.05) in both young and mixed-aged rams than in untreated counterparts. In experiment 2, yarding of ewes and rams overnight on several occasions early in the mating period reduced (p < 0.001) pregnancy rate compared with non-yarded counterparts (89.5% vs 65.5%). Twinning rate was not affected (37.7% vs 36.1%, respectively). In summary, melatonin treatment of Border Leicester rams significantly improved flock reproductive performance in spring due to improved pregnancy rates with young rams and improved litter size with mixed-age rams.

  • carcass and non carcass characteristics of suffolk sired lambs from south australian merino poll dorset x merino and Border Leicester x merino ewes
    Small Ruminant Research, 1990
    Co-Authors: D O Kleemann, Chs Dolling, R W Ponzoni

    Abstract:

    Abstract The carcass and non-carcass characteristics of 121 Suffolk-sired lambs from South Australian Merino (M), Poll Dorset X South Australian Merino (PD X M) and Border Leicester X South Australian Merino (BL X M) ewes were compared in two pen experiments (PEI 1 , PE 2 ) at Turretfield Research Centre, South Australia. When lambs were slaughtered at the same liveweight and carcass characteristics adjusted to constant carcass weight (15.6 and 15.7 kg; PE 1 and PE 2 , respectively) there were no significant differences between breeds of dam for fat depth C, or for percentages of chemical fat (ether extract), protein, moisture and ash. At constant liveweight (e.g. 36.4 kg, PE 2 ) dressing percentage was higher for BL X M and PD X M compared with M progeny (44.6 and 44.5% vs. 39.9%, respectively). Differences due to breed of dam were detected for some of the non-carcass characteristics, adjusted for slaughter weight in either PE 1 or PE 2 , but on no occasion were the differences significant in both experiments. Greasy fleece weight, measured in PE 2 only, was heavier for M compared with BL X M progeny which in turn was heavier compared with PD X M progeny (1.60, 1.29 and 1.11 kg, respectively). We concluded that differences between Suffolk-sired lambs from South Australian Merino, PD X M and BL X M ewes were small for most carcass and non-carcass characteristics when compared at the same carcass weight and slaughter weight, respectively. The relative economic merit of the breeds, therefore, is more likely to be determined by factors other than those examined in the present experiments.

S T Morris – 3rd expert on this subject based on the ideXlab platform

  • evaluation of Border Leicester romney br poll dorset br and suffolk br ewes for out of season lambing
    New Zealand Journal of Agricultural Research, 1993
    Co-Authors: S T Morris, H T Blair, W J Parker, S N Mccutcheon

    Abstract:

    Abstract Three different year groups of Border Leicester × Romney (BR), Poll Dorset × BR (PBR), and Suffolk × BR (SBR) ewes were evaluated for yearling liveweight and greasy fleece weight, and for their 2– and 3–year-old lambing performance under both June– and August-lambing policies. Mating of the June-lambing ewes was induced using progesterone treatment and high ram:ewe ratios. Suffolk × BR hoggets were significantly (P < 0.01) heavier than PBR and BR ewe hoggets in May, October, and January (at about 16 months of age). Border Leicester × Romney hoggets produced significantly (P < 0.01) more greasy wool at the yearling shearing than PBR or SBR hoggets. Lambing policy did not influence the proportion of ewes lambing but there were more (P < 0.05) multiple births in August-lambing ewes. Birth weights and weaning weights of June-born lambs were lower (P < 0.001) than those of their August-born counterparts. Weight of lamb weaned per ewe joined was 22.1 kg for June-lambing ewes and 24.3 kg for August-lamb...

  • Evaluation of Border Leicester × Romney (BR), Poll Dorset × BR, and Suffolk × BR ewes for out-of-season lambing
    New Zealand Journal of Agricultural Research, 1993
    Co-Authors: S T Morris, H T Blair, W J Parker, S N Mccutcheon

    Abstract:

    Abstract Three different year groups of Border Leicester × Romney (BR), Poll Dorset × BR (PBR), and Suffolk × BR (SBR) ewes were evaluated for yearling liveweight and greasy fleece weight, and for their 2– and 3–year-old lambing performance under both June– and August-lambing policies. Mating of the June-lambing ewes was induced using progesterone treatment and high ram:ewe ratios. Suffolk × BR hoggets were significantly (P < 0.01) heavier than PBR and BR ewe hoggets in May, October, and January (at about 16 months of age). Border Leicester × Romney hoggets produced significantly (P < 0.01) more greasy wool at the yearling shearing than PBR or SBR hoggets. Lambing policy did not influence the proportion of ewes lambing but there were more (P < 0.05) multiple births in August-lambing ewes. Birth weights and weaning weights of June-born lambs were lower (P < 0.001) than those of their August-born counterparts. Weight of lamb weaned per ewe joined was 22.1 kg for June-lambing ewes and 24.3 kg for August-lamb...