Genomic data provides insights into the evolutionary history and adaptive differentiation of two tetraploid strawberries

扫码查看

原文链接

万方数据

外文摘要：Over the decades,evolutionists and ecologists have shown intense interest in the role of polyploidization in plant evolution.Without clear knowledge of the diploid ancestor(s)of polyploids,we would not be able to answer fundamental ecological questions such as the evolution of niche differences between them or its underlying genetic basis.Here,we explored the evolutionary history of two Fragaria tetraploids,Fragaria corymbosa and Fragaria moupinensis.We de novo assembled five genomes including these two tetraploids and three diploid relatives.Based on multiple lines of evidence,we found no evidence of subgenomes in either of the two tetraploids,suggesting autopolyploid origins.We determined that Fragaria chinensis was the diploid ancestor of F.corymbosa while either an extinct species affinitive to F.chinensis or an unsampled population of F.chinensis could be the progenitor of F.moupinensis.Meanwhile,we found introgression signals between F.chinensis and Fragaria pentaphylla,leading to the genomic similarity between these two diploids.Compared to F.chinensis,gene families related to high ultraviolet(UV)-B and DNA repair were expanded,while those that responded towards abiotic and biotic stresses(such as salt stress,wounding,and various pathogens)were contracted in both tetraploids.Furthermore,the two tetraploids tended to down-regulate defense response genes but up-regulate UV-B response,DNA repairing,and cell division gene expression compared to F.chinensis.These findings may reflect adaptions toward high-altitude habitats.In summary,our work provides insights into the genome evolution of wild Fragaria tetraploids and opens up an avenue for future works to answer deeper evolutionary and ecological questions regarding the strawberry genus.

作者：

Hanyang Lin、Luxi Chen、Chaonan Cai、Junxia Ma、Junmin Li、Tia-Lynn Ashman、Aaron Liston、Ming Dong

展开 >

作者单位：

School of Advanced Study,Taizhou University,Taizhou 318000,China

Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation,School of Life Sciences,Taizhou University,Taizhou 318000,China

Department of Biological Sciences,University of Pittsburgh,Pittsburgh,PA 15260,USA

Department of Botany and Plant Pathology,Oregon State University,Corvallis,OR 97331,USA

Key Laboratory of Hangzhou City for Ecosystem Protection and Restoration,College of Life and Environmental Sciences,Hangzhou Normal University,Hangzhou 311121,China

展开 >

出版年：

2024

DOI：

10.1093/hr/uhae194

园艺研究(英文)

CSTPCD

ISSN：

年,卷(期)：2024.11(9)