Farid A, Makarechian M, Sefidbakht N
Department of Animal Science, Shiraz University, Iran.
Trop Anim Health Prod. 1989 Feb;21(1):25-31. doi: 10.1007/BF02297338.
Reproduction and lamb production of three fat-tailed, carpet-wool Iranian breeds of sheep; Karakul (130 ewes), Mehraban (103) and Baluchi (119) were studied. The ewes were mated either as purebreds or with Corriedale or Targhee rams. The overall least-squares means for ewes mated (showed oestrus) or ewes exposed, ewes lambed or ewes mated, lambs born of ewes lambing (prolificacy), lambs born alive of total lambs born, lambs weaned of live lambs born, lambs weaned (75 days of age) of ewes mated, kg lamb weaned per ewe mated and kg lamb weaned per 100 kg ewe mated were 98.3%, 93.5%, 103.1%, 94.9%, 97.8%, 90.0%, 18.2 kg and 38.4 kg respectively. The native breeds were not different for any of the traits studied except for prolificacy which was higher in Mehraban than in Karakul. Purebred matings did not differ from the crossbred matings for any of the traits concerning the number of lambs but crossbreeding improved kg lamb weaned per ewe mated (9.2%, P = 0.08) and kg lamb weaned per 100 kg ewe mated (10.0%, P less than 0.05). Among the three native breeds Karakul showed the largest improvement when crossed with the exotic rams for the traits concerning kg lambs weaned. Corriedale and Targhee rams had similar effects on all the traits studied. A lower percentage of virgin ewes showed oestrus, had a lower twinning rate and productivity compared with the mature ones. Sex was not a significant source of variation in lamb livability.
对三种伊朗肥尾地毯毛用绵羊品种——卡拉库尔羊（130只母羊）、梅拉班羊（103只）和俾路支羊（119只）的繁殖性能和产羔情况进行了研究。母羊分别与纯种公羊或考力代公羊或塔基羊公羊进行交配。已交配（表现出发情）母羊或接触公羊母羊、产羔母羊或已交配母羊、产羔母羊所产羔羊（繁殖力）、出生羔羊中存活羔羊、出生存活羔羊中断奶羔羊、已交配母羊所产断奶羔羊（75日龄）、每只已交配母羊断奶羔羊体重（千克）以及每100千克已交配母羊断奶羔羊体重（千克）的总体最小二乘均值分别为98.3%、93.5%、103.1%、94.9%、97.8%、90.0%、18.2千克和38.4千克。在所研究的性状中，本地品种之间除繁殖力外没有差异，梅拉班羊的繁殖力高于卡拉库尔羊。在与羔羊数量有关的任何性状方面，纯种交配与杂交交配没有差异，但杂交提高了每只已交配母羊断奶羔羊体重（9.2%，P = 0.08）以及每100千克已交配母羊断奶羔羊体重（10.0%，P < 0.05）。在三个本地品种中，卡拉库尔羊与外来公羊杂交时，在断奶羔羊体重相关性状上表现出最大的改善。考力代公羊和塔基羊公羊对所有研究性状的影响相似。与成年母羊相比，初产母羊发情比例较低，双羔率和生产力也较低。性别不是羔羊成活率变异的显著来源。
