Bernon D E, Chambers J R
Poult Sci. 1985 Jan;64(1):29-38. doi: 10.3382/ps.0640029.
Sire and dam populations of chickens were synthesized from commercial broiler parent stocks at the Animal Research Centre, Ottawa. The production of two-way and four-way crosses during synthesis permitted measurement of maternal and sex-linked genetic effects on body weight and conformation traits. Sex-influenced effects were also measured. Reciprocal cross differences were minimal. Consequently, there was no evidence among stocks within parental type of maternal effect differences and only minimal evidence of sex-linked genetic effects. As expected, sex-influenced effects were large. Hence, it appears that breeders must work within strains or stocks to improve maternal and sex-linked genetic effects for body weight and conformation.
种鸡和母鸡群体由渥太华动物研究中心的商业肉鸡亲本种群合成。在合成过程中进行两系和四系杂交，以便测量母体和性连锁基因对体重和体型性状的影响。还测量了性影响效应。正反交差异极小。因此，在亲本类型内的品系之间没有证据表明存在母体效应差异，仅有极少证据表明存在性连锁基因效应。正如预期的那样，性影响效应很大。因此，育种者似乎必须在品系或种群内开展工作，以改善体重和体型方面的母体和性连锁基因效应。
