内江猪的遗传结构分析OA北大核心CSTPCD

This study was to investigate the genetic relationships and genetic structure in the Neijiang pig population.Single nucleotide pol-ymorphism(SNP)was detected in 30 Neijiang pigs using the SNP bead chip.The GCTA software was used to construct a G matrix,and the PLINK software was employed to construct an identity by state(IBS)distance matrix,in order to analyze the genetic relationships of the Nei-jiang pig population.The Mega X software was used to construct a population evolution tree and the genetic structure of the Neijiang pig popu-lation was analyzed.The results showed that a total of 57 466 SNPs loci were detected,and 29 468 SNPs loci passed quality control.The ex-perimental Neijiang pig population had a moderate degree of kinship.The population evolution tree divided Neijiang pigs and boars into 6 blood lineages,with the same number as recorded in traditional genealogies.The average inbreeding coefficiency based on ROH was 0.243.In summary,Neijiang pigs had relatively a little blood relationship,low genetic diversity and some degree of inbreeding.Therefore,it is nec-essary to introduce new blood tie to improve the genetic diversity of the population and the population quality.