影响海南黑山羊初生重的非遗传因素初探

A preliminary Probe into Non-genetic factors that Influence Birth Weight of Hainan Black Goats

研究出生年份、出生类型、出生季节和出生性别等非遗传因素对海南黑山羊初生重的影响。初步结果表明,海南黑山羊母羊胎产羔数为1～3羔的比例分别为58.7%、38.9%、2.4%;公羔与母羔之比为0.98∶1;羔羊初生重逐年提高;出生年份、出生类型和出生性别对羔羊初生重都有极显著的影响(p<0.01);出生季节对羔羊的初生重无显著的影响(p>0.05)。分析的4个非遗传因素的两两互作作用中,只有出生季节与出生类型的互作作用对羔羊的出生重无显著的影响(p>0.05),其余的对羔羊初生重都有极显著的影响(p<0.01);3因素和4因素互作作用对羔羊初生重都有极显著的影响(p<0.01)。

The impact of non-genetic factors such as birth year, birth type, birth season and birth sex on the birth weight of Hainan black goats was studied from 2001 to 2003. In the study, a total number of 545 litters including 783 kidlets were analyzed. The statistical analyses indicated that the proportion of 1 to 3 lambs per litter was 58.7%, 38.9% and 2.4% respectively. The ratio of male kidlets and female kidlets were 0.98 ： 1. The action of birth years, birth types and birth sex on kidlets＇ birth weight were significant （p〈0.01） . The action of birth seasons was not significant （p〉0.05） . The interaction between two factors of 4 non-genetic factors analyzed on kidlets＇ birth weight was not significant （p〉0.05） , the interaction of the other factors on kidlets＂ birth weight was significant （p〈0.01） . The interaction of the third factor and fourth factor on kidlets＇ birth weight were significant （p〈0.01） .