成都白鸡快、慢羽纯系的选育及羽型研究

1982年我室就成都白鸡羽型,快,慢羽纯系的选育、K(慢)、k(快)基因频率及杂种鸡羽速自别雌雄的准确率等进行了研究。按主翼羽和覆主翼羽生长状况,该鸡种初生雏羽型分为:快羽一型,慢羽三型。K(慢),k(快)基因频率分别为0.1602和0.8398。表型鸡经测交,纯繁选育出成都白鸡快,慢羽两个品系。以成都白鸡慢羽母鸡同快羽京白公鸡杂交,其杂种鸡羽速自别雌雄的准确率为99.13%。

A STUDY ON FEATHERING TYPE AND SELECTION FOR RAPID AND SLOW FEATHERING STRAINS IN WHITE CHENGDU CHICKENS

1014 day-old chicks of white Chengdu were used to study for their feathering types.By the relationship of the length of the primary feathers to that of the primary coverts chicks were divided into 1 rapid feathering type including 779 chicks and 3 slow feathering types including 235 chicks.The percentage of rapid and slow feathering chicks and gene frequency of sex-linked dominant gene~K" and its allele recessive gene“k”were 23.18%,76.82% and 0.1602,0.8398 respectively.Identities of slow feathering males and females were obtained by the test crosses from phenotypic slow feathering fowls with rapid feathering fowls. The slow feathering line was formed by identified slow feathering males and females.Within a total of 568 cross-bred day-old chicks produced by mating slow feathering females of white chengdu with rapid feathering males of Beijing white Leghorn line Ⅱ and Ⅲ the percentage of auto-sexed chicks,which were examined anatomically,was 99.13% on an average.