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Analysis of Family Structure and Paternity Test of Tan Sheep in Yanchi Area, China

文献类型： 外文期刊

作者： Li, Ling 1 ; Li, Yefang 1 ; Ma, Qing 3 ; Liu, Shuqin 2 ; Ma, Yuehui 1 ; Jiang, Lin 1 ;

作者机构： 1.Chinese Acad Agr Sci CAAS, Natl Germplasm Ctr Domest Anim Resources, Inst Anim Sci, Beijing 100193, Peoples R China

2.Qingdao Agr Univ, Coll Anim Sci & Technol, Qingdao 266109, Peoples R China

3.Ningxia Acad Agr & Forestry Sci, Inst Anim Sci, Yinchuan 750002, Ningxia, Peoples R China

关键词： Tan sheep; single nucleotide polymorphism; family structure; paternity test; inbreeding coefficient

期刊名称：ANIMALS （ 影响因子：3.231； 五年影响因子：3.312 ）

ISSN： 2076-2615

年卷期： 2022 年 12 卷 22 期

页码：

收录情况： SCI

摘要： Simple Summary This study investigated the family structure, parent-child pair and inbreeding coefficient of a Tan sheep breeding farm in Ningxia, China. The results can be used as the theoretical basis for selecting excellent breeding stock and making an apposite mating plan; furthermore, it can provide an important scientific basis for the conservation and reproduction of Tan sheep germplasm resources. Tan sheep is a special breed of locally protected sheep in China, one of the best quality meat sheep in the world. Due to the unclear pedigree of the rams on the Ningxia Tan sheep breeding farm, we investigated 74 rams in the field and explored a new method for family division. Genomic DNA was extracted from the blood of breeding rams. Using Plink software, GCTA tools and R language, we analyzed the genetic structure, kinship, and inbreeding coefficient of the breeding sheep, which revealed the genetic relationship between the individuals. The results showed that there was no obvious clustering phenomenon in the PCA, and the genetic background of the samples was similar. The G matrix and IBS distance matrix indicated that most individuals were far away from each other. Paternity testing identified 24 pairs of unknown parent-child pairs, and all the Tan sheep could be divided into 12 families, which provided a reference for sheep breeding. The average inbreeding coefficient based on the ROH of this population was 0.049, so there was a low degree of inbreeding and the rams in the field were able to maintain high genetic diversity. Overall, we explored a more accurate method through paternity and kinship analysis; it provides a scientific basis for pedigree construction, which has an important application value for Tan sheep breeding.

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