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首页> 外文期刊>Canadian Journal of Animal Science >Laying performance of six pure lines of chickens and four commercial hybrids at the Agassiz Research Centre.
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Laying performance of six pure lines of chickens and four commercial hybrids at the Agassiz Research Centre.

机译：在Agassiz研究中心铺设了六只纯种鸡和四只商业杂种。

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摘要

The Agassiz Research Centre keeps six pure lines of high-producing but non-commercial layers. Egg production, body weight, feed consumption and efficiency, and several characteristics of the eggs were measured to 60 wk of age and compared with those of four commercial white- and brown-egg hybrids. Egg production from 20 to 60 wk was highest for the four commercial hybrids, with no difference between them, and was 6 to 11% lower for the pure line white-egg layers, and 7 to 13% lower for the pure line brown-egg layers. The pure line and hybrid white-egg layers had similar body weights, but the pure line brown-egg layers weighed more than the commercial brown-egg hybrid. Feed efficiency was similar for the four hybrids and was generally better for the hybrids than the pure lines, based largely on higher egg production rather than increased feed consumption. The difference between industrial hybrids and the pure lines studied can be attributed to the selection that has been applied as well as to heterosis.
机译：阿加西研究中心（Agassiz Research Center）保留了六个高产量但非商业层的纯系。测得了60周龄的产蛋量，体重，饲料消耗和效率，以及几个特征，并与四种商品白蛋和棕蛋杂交种进行了比较。四个商品杂种的产蛋量从20周到60周最高，两者之间没有差异，纯种白蛋层的产蛋量降低了6-11％，纯种棕蛋的产蛋量降低了7-13％层。纯品系和杂种白蛋层具有相似的体重，但纯品系棕色蛋层的重量比市售棕色蛋杂种重。四个杂种的饲料效率相似，并且杂种通常比纯种更好，这主要是基于更高的产蛋量而不是饲料消耗的增加。工业杂种与纯种系之间的差异可归因于已应用的选择以及杂种优势。

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