Genomic mechanisms of climate adaptation in polyploid bioenergy switchgrass

第一作者：John T. Lovell

第一单位：HudsonAlpha生物技术研究所

通讯作者：Jeremy Schmutz

 Abstract 

背景回顾：Long-term climate change and periodic environmental extremes threaten food and fuel security and global crop productivity.

提出问题：Although molecular and adaptive breeding strategies can buffer the effects of climatic stress and improve crop resilience, these approaches require sufficient knowledge of the genes that underlie productivity and adaptation—knowledge that has been limited to a small number of well-studied model systems.

主要研究：Here we present the assembly and annotation of the large and complex genome of the polyploid bioenergy crop switchgrass (Panicum virgatum).

结果1-群体重测序：Analysis of biomass and survival among 732 resequenced genotypes, which were grown across 10 common gardens that span 1,800 km of latitude, jointly revealed extensive genomic evidence of climate adaptation. Climate–gene–biomass associations were abundant but varied considerably among deeply diverged gene pools.

结果2-基因流：Furthermore, we found that gene flow accelerated climate adaptation during the postglacial colonization of northern habitats through introgression of alleles from a pre-adapted northern gene pool.

结果3-多倍体：The polyploid nature of switchgrass also enhanced adaptive potential through the fractionation of gene function, as there was an increased level of heritable genetic diversity on the nondominant subgenome.

结论：In addition to investigating patterns of climate adaptation, the genome resources and gene–trait associations developed here provide breeders with the necessary tools to increase switchgrass yield for the sustainable production of bioenergy.

 摘 要 

 通讯作者 

**Jeremy Schmutz**

doi: https://doi.org/10.1038/s41586-020-03127-1

Journal: Nature

Published date: Jan 27, 2021