数字农科院2.0

Predictive potential of microsatellite markers on heterosis of fecundity in crossbred sheep

文献类型： 外文期刊

作者： Di, R.;Chu, M. X.;Fang, L.;Feng, T.;Cao, G. L.;Li, Y. L.;Chen, H. Q.;Zhang, L.;Li, X. W.

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关键词： Sheep;Microsatellite;Heterosis;Litter size

期刊名称： MOLECULAR BIOLOGY REPORTS

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年卷期：

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收录情况： SCI

摘要： Small Tail Han (STH) sheep is a famous Chinese local breed and has perfect prolificacy performance, but it is inferior to imported mutton sheep breeds on meat production. In this study, six imported male sheep populations (White Suffolk, Black Suffolk, Texel, Dorper, South African Mutton Merino and East Friesian) were crossbred with STH female sheep respectively. The heterosis values of litter size, average daily gain (ADG) and feed conversion ratio (FCR) of crossbred sheep were analyzed for seeking the optimal cross. Meanwhile 28 microsatellite markers were used to measure the genetic distance between imported populations and STH population. Regression between the genetic distance and heterosis was analyzed for evaluating potential of microsatellite on predicting heterosis. Results showed a significant positive linear correlation (r = 0.892, P < 0.05) between heterosis of litter size and genetic distance D-A of six crosses. This implied that these microsatellite markers had moderate potential to forecast heterosis of litter size in sheep. Results of this study also indicated that South African Mutton Merino and East Friesian sheep would be the optimal sire breeds for the litter size and might bring the greatest economic benefit in six imported populations; Suffolk sheep could be prior consideration as sire breeds when breeding objective focused on ADG. Finally these results provided valuable information for Chinese sheep industry.

分类号： Q7

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