辽宁新品系绒山羊微卫星标记与经济性状相关性的研究

Correlation Analysis of Microsatellite DNA Markers with Some Substantial Economic Traits in Liaoning New Line Cashmere Goat

为了在生产实践中进行多目标性状的选育,本研究利用微卫星标记技术对辽宁新品系绒山羊所有染色体(29条)上125个微卫星位点进行了研究,分析了体质量、绒产量和绒细度3个经济性状与标记基因型的关系。结果表明,除BM1312等10个为单态外,其余111个呈高度多态(PIC>0.5),4个呈中度多态(0.25<PIC<0.5)。并对呈多态的115个微卫星位点经济性状的相关关系进行分析,找到了与体质量、绒产量和绒细度相关的优势基因型,特别是发现了MoM064位点的DE基因型(112～117bp)为绒细度和绒产量性状的共同优势基因型。此项研究为在生产实践中进行多目标性状的选育提供了试验依据。

For selection and breeding of multiple objective traits in production practice, the eco- nomic traits of Liaoning new line cashmere goat were analyzed by 125 microsatellite loci on the whole 29 chromosomes. The association among three economic traits （body weight, cashmere yield and cashmere fineness） and the marker genotypes was analyzed. The results showed that there were 111 microsatellite loci showing high polymorphism （PIC〉O. 5） and 4 microsatellite loci showing intermediate polymorphism（0.25〈PIC〈O. 5）,and 10 loci include BM1312 showing monomorphism. Effects of 115 polymorphic microsatellite loci on economic traits were also ana- lyzed. The genotypes which favorably affect the three economic traits（body weight, cashmere yield and cashmere fineness） were found. Especially, DE at MoM064 （112-117 bp） was favorable genotype for cashmere fineness and cashmere yield. This research provides an experimental basis for selection and breeding of multiple objective traits in production practice.