Acta Veterinaria et Zootechnica Sinica ›› 2024, Vol. 55 ›› Issue (9): 3925-3935.doi: 10.11843/j.issn.0366-6964.2024.09.017

• Animal Genetics and Breeding • Previous Articles     Next Articles

Molecular Genealogy Construction and Population Genetic Structure Analysis of Jilin Sika Deer Based on SNP Loci

Guangxuan FAN1(), Tianjiao WANG1, Yimeng DONG1, Hongliang WANG1, Ning DING2, Xinhao WANG3, Xiumei XING1,*()   

  1. 1. Key Laboratory of Genetics, Breeding and Reproduction of Special Economic Animals of Ministry of Agriculture and Rural Affairs, Institute of Special Animal and Plant Sciences of Chinese Academy of Agricultural Sciences, Changchun 130112, China
    2. College of Wildlife and Protected Area, Northeast Forestry University, Harbin 150006, China
    3. Guangdong Chimelong Group, Zhuhai 519000, China
  • Received:2024-02-19 Online:2024-09-23 Published:2024-09-27
  • Contact: Xiumei XING E-mail:2362416222@qq.com;xingxiumei2004@126.com

Abstract:

The aim of this study was to construct a molecular pedigree for the Jilin sika deer conservation herd using SNP loci obtained by genome resequencing technology, and to analyse the genetic structure of the population. The 10 mL of blood from Jilin sika deer of the conservation herd (n=425) during the antler-sawing period was collected, including 132 adult bucks, 208 adult does and 85 fawns, and extracted the DNA for whole genome resequencing. The kinship relationship of Jilin sika deer was analysed by calculating the blood homology coefficient (IBD), and the genetic structure of the Jilin sika deer conservation population was analysed based on the observed heterozygosity (Ho), the expected heterozygosity (He), the polymorphic information content (PIC), the phylogenetic tree and the population differentiation index (Fst). The 25 548 601 high-quality SNPs were screened by whole genome resequencing, and 425 samples comprised a total of 90 100 pairs of kinship relationships, with an average kinship coefficient of 0.435 1. A total of 195 pairs of paternity and 143 pairs of maternity were derived, which accounted for 92% of the original genealogical records of the sampled populations, and the error rate of the original genealogical records was detected to be 2.2%, and the errors of the original records were corrected to be 8, with a high accuracy and reliability. The group differentiation index (Fst) was calculated, and the Dongfeng-type Jilin sika deer was farther away from the Yitong-type; the phylogenetic tree was drawn, and the Jilin sika deer population was divided into 17 families; the average observed heterozygosity of the SNP markers was 0.456, the average expected heterozygosity was 0.277, and the average polymorphic information content was 0.627. The average inbreeding coefficient was 0.078, and there was weak inbreeding. The present study established the molecular genealogy and analysed the population genetic structure of the Jilin sika deer conservation herd, which is crucial for the conservation of genetic diversity of the Jilin sika deer and for the planning of the subsequent selection and breeding programme of the conservation herd.

Key words: Jilin sika deer, SNP, molecular genealogy

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