Marginal profits for all objective traits but litter size born alive in dam line of dam breed are 1/2 smaller than those in sire line of dam breed.
父本父系目标性状不包括窝活产仔数，母本母系目标性状的边际效益除窝活产仔数外的所有性状都比母本父系小1/2。
Some researches about high reproductive traits of pigs had been confirmed that the estrogen receptor gene(ESR)was the main gene affecting the litter size trait, which could decide1~1.5piglets.
在猪的高繁殖力特性研究中证实，雌激素受体（ESR）基因是可影响产仔数1～1.5头的主效基因。
MTGSAM was used in gametic imprinting effect analysis of two traits for Matou goats: body weight and litter size.
采用MTGSAM软件对马头山羊体重和产羔数两个性状进行配子印迹效应分析。
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