Animal Research Centre, Agriculture Canada, K1A OC6, Ottawa, Ontario, Canada.
Theor Appl Genet. 1984 Nov;69(1):23-30. doi: 10.1007/BF00262532.
Sire and dam populations of meat-type chickens were developed at the Animal Research Centre, Ottawa to provide unselected control populations suitable for modern broiler research, estimate genetic parameters of broiler traits, and initiate selection experiments. The populations were synthesized from 16 commercial broiler parent stocks (nine sire and seven dam stocks) during two generations of crossbreeding and one generation of random mating. The estimated genetic contribution per stock to the respective population ranged from 8.3 to 16.7% for autosomal genes, from 5.5 to 17.8% for genes on Z chromosomes, and from 0 to 25.0% for genes on W chromosomes. Genetic differences among the original stocks had not been fully diffused among individuals within the populations at the time parameters were estimated. Consequently, genetic parameter estimates are probably slightly biased. Estimated heritabilities of broiler traits in these populations were generally high, 0.39 to 0.63. Hence, rapid genetic change of these traits is possible. The genetic correlation between 28 to 49 day feed efficiency and corresponding weight gain was 0.69 and between feed efficiency and abdominal fat percentage was -0.68. Increasing body weight gain, improving feed efficiency and reducing abdominal fatness of broilers by selection appears feasible.
肉用型鸡 sire 和 dam 群体是在渥太华动物研究中心开发的，旨在提供未经选择的对照群体，用于现代肉鸡研究，估计肉鸡性状的遗传参数，并启动选择实验。这些群体是通过两代杂交和一代随机交配，从 16 个商业肉鸡亲本群体（9 个 sire 和 7 个 dam 群体）合成的。每个群体对各自群体的遗传贡献估计值为常染色体基因的 8.3%至 16.7%，Z 染色体基因的 5.5%至 17.8%，W 染色体基因的 0%至 25.0%。在估计参数时，原始群体之间的遗传差异尚未在群体内个体之间充分扩散。因此，遗传参数估计值可能略有偏差。这些群体中肉鸡性状的估计遗传力通常较高，为 0.39 至 0.63。因此，这些性状的快速遗传变化是可能的。28 至 49 日龄饲料效率与相应体重增加之间的遗传相关系数为 0.69，饲料效率与腹部脂肪百分比之间的遗传相关系数为-0.68。通过选择增加肉鸡的体重增加、提高饲料效率和减少腹部脂肪似乎是可行的。
