基于微卫星标记鉴定湖羊家系

doi:10.16431/j.cnki.1671-7236.2020.11.019

摘要/Abstract

摘要： 试验旨在基于微卫星（simple sequence repeats，SSR）多态性探索一种鉴定与划分湖羊家系的方法，通过查阅文献筛选出9个分布于多个常染色体、具有高多态性信息、高杂合度的湖羊微卫星位点BM3051、HH64、TGLA137、MAF33、FCB48、VH72、INRA023、ETH152和MCM527。采集30只湖羊种公羊血液，使用试剂盒提取血液基因组DNA，合成筛选出的9个微卫星引物并使用荧光基团标记，利用降落式PCR进行扩增，扩增产物在基因分型后使用CERVUS3.0.7进行基因型分析，使用POPGENE1.32基于Nei氏遗传距离构建树状聚类图，根据图示的亲缘关系远近划分湖羊家系。结果显示，当双亲基因型未知时，9个微卫星位点的单亲累积排除概率为99.2094%；当单亲基因型已知时，9个微卫星位点的累积排除概率为99.9688%；当双亲基因型未知时9个微卫星位点的双亲累积排除概率为99.9999%，排除概率能够满足遗传育种中亲子鉴定和系谱分析的要求。根据Nei氏遗传距离构建UPGMA聚类图，将30只种公羊划分为6个家系，为育种工作提供了一定参考。本方法能够进行湖羊家系的鉴定与划分，对湖羊育种工作具有一定的应用价值。

关键词: 湖羊; 微卫星标记; 降落PCR; 家系鉴定

Abstract: The purpose of this study was to explore identification and division methods of Hu sheep family based on simple sequence repeats(SSR) polymorphism.Nine SSR loci of BM3051,HH64,TGLA137,MAF33,FCB48,VH72,INRA023,ETH152 and MCM527 were selected,which were distributed in several autosomes,with high polymorphism and high heterozygosity.DNA was extracted from the blood samples of 30 Hu breeding rams by blood DNA extraction kit.SSR primers were synthesized and labeled with the fluorescent group.The products were amplified by touch-down PCR.After genotyping,CERVUS3.0.7 was used for genotyping analysis.POPGENE1.32 was used to construct a dendrogram based on Nei's genetic distance to divide Hu sheep families.The results showed that the cumulative exclusion probability of single parent was 99.2094% when the genotypes of both parents were unknown,99.9688% when a single parent genotypes were known,99.9999% when both parents' genotypes were unknown.Exclusion probability could meet the requirements of paternity identification and pedigree analysis in genetic breeding.UPGMA clustering map was constructed according to Nei's genetic distance,and 30 breeding rams were divided into six families,which provided a reference for sheep breeding.The method could run the family identification and division of Hu sheep,which had application value for the breeding of Hu sheep.

Key words: Hu sheep; microsatellite marker; touch-down PCR; pedigree identification

中图分类号:

S816.6

赵志达, 王欣悦, 石田培, 胡文萍, 尚明玉, 张莉. 基于微卫星标记鉴定湖羊家系[J]. 中国畜牧兽医, 2020, 47(11): 3573-3583.

ZHAO Zhida, WANG Xinyue, SHI Tianpei, HU Wenping, SHANG Mingyu, ZHANG Li. Identification of Hu Sheep Family Based on Microsatellite Markers[J]. China Animal Husbandry and Veterinary Medicine, 2020, 47(11): 3573-3583.

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