Landscape genetics reveals that adaptive genetic divergence in Pinus bungeana (Pinaceae) is driven by environmental variables relating to ecological habitats

BMC Evolutionary Biology

Ying Liu¹  Jia-Xin Li²  Bao-Guo Liu²  Zhi-Hao Qian²  Xue-Xia Zhang²  Yong Li²  Yan-Xia He³ 

[1] Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University;Innovation Platform of Molecular Biology College of Forestry, Henan Agricultural University;School of Life Sciences, Henan University;

关键词: Adaptive genetic divergence;    Adaptation potential;    Environment-associated loci;    Ecological niche modeling;    Pinus bungeana;    SCoT marker;   

DOI  :  10.1186/s12862-019-1489-x

来源: DOAJ

【 摘 要 】

Abstract Background Understanding the genetic basis of local adaptation has long been the concern of biologists. Identifying these adaptive genetic variabilities is crucial not only to improve our knowledge of the genetic mechanism of local adaptation but also to explore the adaptation potential of species. Results Using 10 natural populations and 12 start codon targeted (SCoT) markers, a total of 430 unambiguous loci were yielded. The Bayesian analysis of population structure clearly demonstrated that the 10 populations of P. bungeana could be subdivided into three groups. Redundancy analysis showed that this genetic divergence was caused by divergence selection from environmental variables related to the ecological habitats of “avoidance of flooding” and “avoidance of high temperature and humidity.” LFMM results indicated that Bio1, Bio5, Bio8, Bio12, Bio14, and Bio16, which are related to the ecological habitat of P. bungeana, were correlated with the highest numbers of environment-associated loci (EAL). Conclusions The results of EAL characterization in P. bungeana clearly supported the hypothesis that environmental variations related to the ecological habitat of species are the key drivers of species adaptive divergence. Moreover, a method to calculate the species landscape adaptation index and quantify the adaptation potential of species was proposed and verified using ecological niche modeling. This model could estimate climatically suitable areas of species spatial distribution. Taking the results together, this study improves the current understanding on the genetic basis of local adaptation.

【 授权许可】

Unknown