Wide-genome selective analysis of Boer goat to investigate the dynamic
heredity evolution under different domestic stages
Abstract
Boer goats, as kemp in meat-type goats, are selected and bred from
African indigenous goats under a long period of artificial selection.
Their advantages in multiple economic traits, particularly their plump
growth, have attracted worldwide attention. Here, we displayed the
wide-genome selective sweep of South Africa indigenous goat (AF),
African Boer (BH), and Australian Boer (AS) to investigate the
hereditary basis of artificial selection in different domesticated
stages. A total of 18321865 SNPs and 9784 autosomal CNVs were
identified, 573 candidate genes are screened by top 5% of both
parameters (πrate and FST) for BH vs AF; 502 candidate genes were
obtained from AS vs BH based on SNP data. Regarding CNV data, 24
candidate genes were annotated from top 1% CNVs (FST≥0.511719) based on
BH vs AF, and 23 were annotated from top 1% (FST≥0.609523) CNVs in AS
vs BH. A mount of identified candidate genes was related to
reproduction, metabolism, growth, and development according to GO and
KEGG annotation. Furthermore, these candidate genes related to the
metabolism of fatty acids, minerals, and vitamins confirmed that raising
level led to the rapid co-evolution of the metabolism and environment of
Boer goats. Specifically, we found a series of non-synonymous mutations
from the coding region of NF1 have significant allele frequency
different between populations that was related to muscle development.
This study provided valuable genomic resources for exploring the
evolutionary history of Boer goats and genetic improvement of goats. It
also helped us elucidate the genetic basis behind artificial selection
in domestic animals.