汉江黑猪分子系谱的构建和近交评估OA

This study aims to elucidate the pedigree structure and degree of inbreeding among Hanjiang black pigs,providing essential research insights for the development of genetic breeding and breeding pro-grams.Whole genome resequencing was conducted on 60 Hanjiang black pigs,followed by population ge-netics analysis and genomic characterization.The results show that Hanjiang black pigs are classified into four distinct families;Families 1,2,and 4 share similar lineage compositions,while Family 3 exhibits dis-tinct characteristics;Principal components analysis results align with Admixture outcomes;Homozygosity and inbreeding coefficients are consistent across the genome within each family of Hanjiang black pigs,with the number and length of Runs of Homozygosity(ROH)showing a linear correlation.Notably,fami-lies 1 and 2 display low inbreeding coefficients,whereas some individuals in family 4 and all of family 3 ex-hibit higher levels of inbreeding.The construction of a molecular pedigree and assessment of genomic char-acteristics based on SNP information offer valuable insights for the conservation and utilization of Hanjiang black pigs.