期刊
GENOME BIOLOGY AND EVOLUTION
卷 11, 期 10, 页码 2976-2989出版社
OXFORD UNIV PRESS
DOI: 10.1093/gbe/evz220
关键词
GEA; loblolly pine; climate adaptation; ultradense linkage map
资金
- U.S. Department of Agriculture/National Institute of Food and Agriculture [McIntire Stennis project] [1020440, 201167009-30030]
Understanding the genomic basis of local adaptation is crucial to determine the potential of long-lived woody species to withstand changes in their natural environment. In the past, efforts to dissect the genomic architecture in gymnosperms species have been limited due to the absence of reference genomes. Recently, the genomes of some commercially important conifers, such as loblolly pine, have become available, allowing whole-genome studies of these species. In this study, we test for associations between 87k SNPs, obtained from whole-genome resequencing of loblolly pine individuals, and 270 environmental variables and combinations of them. We determine the geographic location of significant loci and identify their genomic location using our newly constructed ultradense 26k SNP linkage map. We found that water availability is the main climatic variable shaping local adaptation of the species, and found 821 SNPs showing significant associations with climatic variables or combinations of them based on the consistent results of three different genotype environment association methods. Our results suggest that adaptation to climate in the species might have occurred by many changes in the frequency of alleleswith moderate to small effect sizes, and bythe smaller contribution of large effect alleles in genes related to moisture deficit, temperature and precipitation. Genomic regions of low recombination and high population differentiation harbored SNPs associated with groups of environmental variables, suggesting climate adaptation might have evolved as a result of different selection pressures acting on groups of genes associated with an aspect of climate rather than on individual environmental variables.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据