Malik R C, Singh R N, Acharya R M, Dutta O P
Trop Anim Health Prod. 1980 Nov;12(4):217-23. doi: 10.1007/BF02236619.
Survival from birth to 1 month, 1 month to weaning, weaning to 1 year and birth to 1 year was studied in crosses of native carpet wool breeds (Chokla, Malpura and Jaisalmeri) with Rambouillet. Least-squares analysis of data considering survival as 1 and mortality as 0, showed that the year and season of birth affected survival significantly during all age periods except from birth to 1 month and from 1 month to weaning where season had no significant effect. Sex (studied only for pre-weaning survival), ewe's weight at lambing and birth weight of lamb did not influence survival except that the ewe's weight a significant influence on survival from 1 month to weaning. Genetic groups did not differ significantly. Rambouillet X Malpura F1s had a higher survival rate than the other 2 F1s. There was a non-significant decline in survival with an increase in Rambouillet inheritance, except that 5/8 Rambouillet -3/8 Chola crossbreds had a slightly higher survival rate than Rambouillet X Chokla F1s. Interbreeding F1 and 3/4 crossbreds did not result in any significant decline in survival. The results show that the introduction of exotic fine-wool inheritance up to 50% and interbreeding of halfbreds will not result in any decline in survival.
对本地地毯毛品种（乔克拉、马尔普拉和斋沙默里）与兰布耶羊杂交后代从出生到1个月、1个月到断奶、断奶到1岁以及出生到1岁的存活情况进行了研究。将存活视为1、死亡视为0对数据进行最小二乘法分析，结果表明，除了从出生到1个月以及从1个月到断奶这两个阶段季节对存活无显著影响外，出生年份和季节在所有年龄段都对存活有显著影响。性别（仅研究断奶前的存活情况）、母羊产羔时的体重以及羔羊的出生体重对存活没有影响，不过母羊体重对从1个月到断奶阶段的存活有显著影响。遗传群体之间没有显著差异。兰布耶×马尔普拉F1代的存活率高于其他两个F1代。随着兰布耶羊遗传比例的增加，存活率有不显著的下降，不过5/8兰布耶 - 3/8乔克拉杂交种的存活率略高于兰布耶×乔克拉F1代。F1代与3/4杂交种杂交并没有导致存活率出现任何显著下降。结果表明，引入高达50%的外来细毛遗传物质以及半杂种杂交不会导致存活率下降。
