武定鸡农大Ⅰ系数量性状遗传分析

The Genetic Analysis of Quantitative Character of Wuding Chichen Nongda Line Ⅰ

我校从１９８１年开始由产地引进武定鸡，观察繁殖。１９８３年选出无血缘关系的公鸡２１只，母鸡８２只，组建家系。采用闭锁群家系结合个体的选择，已完成七个世代的系统选育，主要性状指标均获得明显的遗传进展。９０日龄体重公鸡为１１０９．６５ｇ，母鸡１０１２．０４ｇ，分别比零世代增加２１９．２２ｇ，１５８．３０ｇ，耗料比３．４２：１，５００日龄产蛋数１４３９４个，蛋重５２．６５ｇ，分别比零世代增加４０．１４个和０．７１ｇ．本研究估计出各世代主要性状的遗传参数，为选育、利用地方鸡种资源积累资料。

Wuding Chicken have been reproduced and observed in Y A U since198 1. The formal family was set up with 21 cocks and 82 hens in 1983, which had notthe same blood line。The family selection combined with the individual selcction wasadopted in the closed flock.Now,Seven generations of the Chicken have been bred andselected, the notable genetic improvement has been achived in the main traits. TheWeight of 90-day-old cocks is 1109.65 grams, that of the hen is 1012.04 grams,Which have increased 219.22 grams(♂)and 158.30 grams(♂)respectively com-pared with the zero generation, Feed conversion is 3.42:1.The egg production and itsweight in the age of 500 day are 143.94 and 52.65 grams,which have increased about40.14 and 0.71 grams repectively compared with the zero generation。The research has estimated the genetic parameter of the major Characteristics ofeach generation and provided a basic data for breeding and utilizing the local chicken。