Ziqi Zhong , Feng Wang , Xinfeng Xie , Ziyi Wang , Deyou Pan , Zhen Wang , Qian Xiao
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引用次数: 0
Abstract
In light of the challenges posed by global climate change, the environmental adaptability of organisms is becoming increasingly important. The Wuzhishan (WZS) pig, tolerant to high heat and humidity, is an ideal model for genomic study. By characterizing its genome and assessing its genetic diversity and runs of homozygosity (ROH), we can gain insights into its current conservation status and genomic architecture. To this end, we analyzed whole-genome resequencing data from WZS pigs, identifying a comprehensive set of genetic variations: 12,844,858 single nucleotide polymorphisms (SNPs), 4,723,303 insertions and deletions (InDels), 39,311 copy number variations (CNVs), and 70,392 structural variations (SVs). ROH analysis revealed mostly short segments, indicating limited recent admixture and relatively low inbreeding, reflecting high genetic diversity. Linkage disequilibrium decay and effective population size analyses supported these findings, consistent with previous studies. Population genetic analyses of pig populations from Asia, Europe, and the Americas were conducted using SNPs, InDels, and SVs. The results obtained from different variant types were largely concordant, suggesting that the constructed genomic variation database is robust. Notably, the WZS pig displayed relatively unique genetic characteristics compared to other breeds. By intersecting the top 5 % of genes under selection signatures, we identified key pathways and candidate genes associated with important traits in WZS pigs, including reproduction (ABCC9, APC2, CABS1, CSNK1G1), immunity (ARPIN, CMAS, ITPR1, SLC25A13), meat quality (GANC, OBSCN, SLC5A4), environmental adaptability (MAGI1, PHF3), and heat tolerance (GABPB1, LRRC25). Further integrative analyses based on transcriptomic, single-cell transcriptomic, and epigenomic data were conducted to explore the regulatory mechanisms of key genes such as LRRC25 and ITPR1. We identified relevant expression quantitative trait loci (eQTLs), associated tissues, and distal regulatory elements that potentially influence gene expression. These findings suggest that epigenetic modifications may contribute to the enhanced heat tolerance and immune function observed in WZS pigs. In conclusion, WZS pigs represent a valuable genetic resource. Further research on this breed will deepen our understanding of mechanisms underlying environmental adaptability, and provide important insights into evolutionary biology and breeding strategies for improved resilience in livestock.
期刊介绍:
The Journal of Thermal Biology publishes articles that advance our knowledge on the ways and mechanisms through which temperature affects man and animals. This includes studies of their responses to these effects and on the ecological consequences. Directly relevant to this theme are:
• The mechanisms of thermal limitation, heat and cold injury, and the resistance of organisms to extremes of temperature
• The mechanisms involved in acclimation, acclimatization and evolutionary adaptation to temperature
• Mechanisms underlying the patterns of hibernation, torpor, dormancy, aestivation and diapause
• Effects of temperature on reproduction and development, growth, ageing and life-span
• Studies on modelling heat transfer between organisms and their environment
• The contributions of temperature to effects of climate change on animal species and man
• Studies of conservation biology and physiology related to temperature
• Behavioural and physiological regulation of body temperature including its pathophysiology and fever
• Medical applications of hypo- and hyperthermia
Article types:
• Original articles
• Review articles