Population structure, diversifying selection, and local adaptation in Pinus patula.
Population structure, diversifying selection, and local adaptation in Pinus patula.
复制标题
孔雀松的种群结构、多样化选择和地方适应。
DOI：
10.1002/ajb2.1566
复制
发表时间：
2020
影响因子：
3
通讯作者：
D. Gernandt
中科院分区：
文献类型：
--
作者：
Pablo Peláez;Alfredo Ortíz;Laura Figueroa;J. Montes;D. Gernandt
前提
预计气候变化将影响天然林和种植园林。针叶树克服环境变化的反应将取决于他们对当地条件的适应，然而，种内适应性遗传变异是未知的大多数裸子植物。研究遗传多样性与表型变异沿着环境梯度将提高我们对适应的理解，并可能揭示重要的保护和管理的基因库。
方法
我们使用目标富集和基因组略读，以获得单核苷酸多态性（SNP）从61个人的松patula，松树原产于墨西哥，广泛用于种植园林业。我们研究了两个品种的适应性遗传变异的形态和分布的差异可能与遗传和适应性分歧。
结果
群体结构和单倍型网络分析表明，孔雀草的遗传多样性。patula和P.patula var. longipedunculata是结构化的，即使在种群内的P. patula var.长梗类我们观察到高的遗传多样性，低近交率，和快速连锁不平衡（LD）衰减的品种。基于离群值检验，在地理上遥远的P. patula var. longipedunculata种群对于这两个品种，我们发现气候相关的环境变化和SNP多样性在基因座参与非生物胁迫，细胞运输，防御和细胞壁生物发生，指向当地的适应之间的显着相关性。
结论
总体而言，在P. patula种内的适应性遗传变异显着的检测，突出了不同的遗传库的存在和地方适应的迹象，应该考虑在林业和保护。
PREMISE
Climate change is predicted to affect natural and plantation forests. The responses of conifers to overcome changing environments will depend on their adaptation to local conditions; however, intraspecific adaptive genetic variation is unknown for most gymnosperms. Studying genetic diversity associated with phenotypic variability along environmental gradients will enhance our understanding of adaptation and may reveal genetic pools important for conservation and management.
METHODS
We used target enrichment and genome skimming to obtain single nucleotide polymorphisms (SNPs) from 61 individuals of Pinus patula, a pine tree native to Mexico widely used in plantation forestry. We investigated the adaptive genetic variation of two varieties with morphological and distributional differences potentially related to genetic and adaptive divergence.
RESULTS
Population structure and haplotype network analyses revealed that genetic diversity between P. patula var. patula and P. patula var. longipedunculata was structured, even within populations of P. patula var. longipedunculata. We observed high genetic diversity, low inbreeding rate, and rapid linkage disequilibrium (LD) decay in the varieties. Based on outlier tests, loci showing signatures of natural selection were detected in geographically distant P. patula var. longipedunculata populations. For both varieties, we found significant correlations between climate-related environmental variation and SNP diversity at loci involved in abiotic stress, cell transport, defense, and cell wall biogenesis, pointing to local adaptation.
CONCLUSIONS
Overall, significant intraspecific adaptive genetic variation in P. patula was detected, highlighting the presence of different genetic pools and signs of local adaptation that should be considered in forestry and conservation.
影响因子：
1.4
作者：
HILL, WG;WEIR, BS
通讯作者：
WEIR, BS
影响因子：
9.8
作者：
Purcell, Shaun;Neale, Benjamin;Sham, Pak C.
通讯作者：
Sham, Pak C.
影响因子：
7
作者：
Alexander, David H.;Novembre, John;Lange, Kenneth
通讯作者：
Lange, Kenneth