黄羽肉鸡慢羽羽型遏传及分布规律研究

对“８８２”黄羽肉鸡慢羽系后代以及利用留种的四类羽型进行两两交叉配种后代的羽型进行了观察统计。结果发现：慢羽系的一代四类羽型鸡的分布以倒长型为主体羽型（６５．９４％），然后是未出型（２６．３８％），而等长型（５．９５％）和微长型（１．７３％）在四类羽型鸡所占的比例很小。不同性别之间四种羽型的分布趋势没有发生改变，但分布比例存在较大差异。羽毛生长较差的未出型在公鸡中所占的比例比在母鸡中所占的比例大，而其余三种羽型的分布比例却低于在母鸡中所占的比例。留神的四类鸡两两交配的各个组合后代中四种羽型的分布发生了较大变化，与其父母代的羽型有极强的依赖关系，表现出强烈的剂量效应。

Study on the Inheritance and Distribution of Slow feathering Type in Yellow Plumage Meat Chicken

in this paper, the author studied the distribution of the slow - feathering pure line and the offspring off differenttypes mating each other. The results show that the pure line chicken could be devided into four groups according to theirslowfeathering types: Type S1 (the primaries shorter than secondaries) is the highest (56. 74% ); Type S2 (the primaries not extended out, only the secondaries) is the second (26. 38% ); type S3 (the same in length Of primaries and seccondaries ) is the third(5. 95% ); Type S4 (the Primaries longer than secondaries within 2mm) is the lowest (1. 73% ). In each combination, the offspringof these slowfeathering types mating to each other show much change in distribution of four slowfeathering types. They were affectedby the gene - type of their parents and shows additive effects in the four slowfeathering types.