【摘要】 本文通过四个交配组合得到表型和基因型不同的九个组别,在相同遗传背景基础上比较了性染色体上慢羽(K)和快羽(K)基因,常染色体上显性白羽(I)和有色羽(i)基因对母鸡生产性能的影响。结果表明不同基因型对育成期死亡率无显著影响;含有k基因的母鸡组72周总蛋重比含有K基因的母鸡组较重;ii基因型的母鸡组比Ii基因型的母鸡组饲料报酬较好;各种不同基因型间蛋的品质均无显著差异。更多还原

【Abstract】 After four mating types we obtained nine different groups of genotypes which could be distingwished by their phenotypes. The influences of slow-feathering(K) and fast-feathering(k) gene at sex-chromosome, and of dominant white (I) and colored-feathering at autosome on the performance of layers were compared under Same conditions, The results showed that: (1) There was no significant difference between different genotypes on mortality in the growing phase; (2)Early-feathering hens had better performance of egg mass of 72-weeks than late-feathering hens; (3)Hens wifh genotype ii had better feed conversion than hens with genotype li; (4) To the egg quality, there were no significaut differences among different genotypes investigated.更多还原