Boa-Amponsem K, Briles W E, Briles R W, Dunnington E A, Siegel P B
Poultry Science Department, Virginia Polytechnic Institute, Blacksburg, Virginia 24061.
Poult Sci. 1992 Oct;71(10):1583-9. doi: 10.3382/ps.0711583.
The current study evaluated influence of genotypes of the B and C alloantigen systems on production traits in lines of White Plymouth Rock chickens. Lines had been selected previously for high (HWS) or low (LWS) 8-wk BW and after 27 generations of selection, a random sample of each selected line was used to initiate subpopulations in which selection was relaxed. For the present study, blood typing was used to identify allelic frequencies for the B and C systems for five consecutive generations of selection (Generations 30 through 34) and three consecutive generations of relaxation (Generations 5 through 7). Haplotypes for the B complex were assigned designations B32, B33, B34, and B35 and alleles of the C system were assigned C8, C9, C10, and C11. Production traits for males were BW at 4 and 8 wk of age, and for females were BW at 4, 8, and 38 wk of age, age and BW at production of first egg, percentage of normal eggs, and percentage of normal hen-day egg production. There were no differences in production traits among B genotypes or among C genotypes, although some time trends in gene frequencies suggested that more subtle effects may be present.
本研究评估了B和C同种异体抗原系统的基因型对白普利茅斯洛克鸡品系生产性状的影响。这些品系先前已根据8周龄体重高（HWS）或低（LWS）进行了选择，经过27代选择后，每个选定品系的一个随机样本被用于启动选择放松的亚群。在本研究中，通过血型鉴定来确定连续五代选择（第30代至34代）和连续三代选择放松（第5代至7代）过程中B和C系统的等位基因频率。B复合体的单倍型被指定为B32、B33、B34和B35，C系统的等位基因被指定为C8、C9、C10和C11。雄性的生产性状为4周龄和8周龄体重，雌性的生产性状为4周龄、8周龄和38周龄体重、开产日龄和体重、正常蛋百分比以及正常母鸡日产蛋率。尽管基因频率的一些时间趋势表明可能存在更细微的影响，但B基因型或C基因型之间的生产性状没有差异。
