China Animal Husbandry and Veterinary Medicine ›› 2021, Vol. 48 ›› Issue (8): 2878-2888.doi: 10.16431/j.cnki.1671-7236.2021.08.020

• Genetics and Breeding • Previous Articles     Next Articles

Analysis on Genetic Relationship and Inbreeding Coefficient of Yellow Boer Rams by Genotyping-by-Sequencing

LAN Rong, ZHU Lan, JIANG Yanting, OUYANG Yina, SHAO Qingyong   

  1. Yunnan Institute of Animal Science and Veterinary, Kunming 650224, China
  • Received:2021-03-03 Online:2021-08-20 Published:2021-08-19

Abstract: Accurate measuring of the inbreeding degree and genetic relationship on yellow Boer goat was an effective way to improve breeding efficiency and genetic progress of Yunnan Yellow goat breeding.The genotyping-by-sequencing (GBS) was used to sequence 37 yellow Boer rams from Yunnan breeding promotion center.High quality and high density SNP variation information was obtained through quality control.Principal component analysis (PCA), calculation of identity by state (IBS), construction of G matrix, calculation of genetic coefficient, NJ cluster analysis and calculation of inbreeding coefficient were carried out by Gmatrix v2, Plink v1.90 and MegaX v10.0 software.The results showed that 88 393 high-quality SNPs were detected on 29 autosomes in 37 yellow Boer rams, and 1 537 long homozygous fragments (ROH) ranging in length from 1 000.582 to 18 400.12 kb with an average length of 2 576.34 kb and 93.15 SNPs were detected.37 yellow Boer rams were divided into 11 families and 3 families had only one ram each.The genetic relationship between family A and family K was the farthest.The average genomic inbreeding coefficient (FROH) based on ROH was 0.043 and the FROH of 3 yellow Boer rams was more than 0.125 which meant more inbreeding accumulation existing.This study provided a scientific basis for the rational use of yellow Boer goat in the breeding of Yunnan Yellow goat, and also provided a powerful technical means for evaluating the inbreeding level of goats, preventing inbreeding decline, and optimizing the breeding and matching scheme.

Key words: yellow Boer rams; GBS; ROH; FROH; kinship coefficient

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