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Article|21 Feb 2020|OPEN
Preferential gene retention increases the robustness of cold regulation in Brassicaceae and other plants after polyploidization
Xiao-Ming Song1,2, Jin-Peng Wang1,2, Peng-Chuan Sun1,2, Xiao Ma3, Qi-Hang Yang1, Jing-Jing Hu1, Sang-Rong Sun1, Yu-Xian Li1,2, Ji-Gao Yu1, Shu-Yan Feng1, Qiao-Ying Pei1, Tong Yu1, Nan-Shan Yang1, Yin-Zhe Liu1, Xiu-Qing Li4, Andrew H. Paterson5 & Xi-Yin Wang1,2,
1School of Life Science, North China University of Science and Technology, Tangshan 063210, China
2Center for Genomics and Computational Biology, North China University of Science and Technology, Tangshan 063210, China
3Library, North China University of Science and Technology, Tangshan 063210, China
4Fredericton Research and Development Centre, Agriculture and Agri-Food Canada, Fredericton, New Brunswick E3B 4Z7, Canada
5Plant Genome Mapping Laboratory, University of Georgia, Athens, GA 30605, USA

Horticulture Research 7,
Article number: 20020 (2020)
doi: 10.1038/hortres.2020.20
Views: 451

Received: 08 Sep 2019
Revised: 12 Nov 2019
Accepted: 15 Jan 2020
Published online: 21 Feb 2020

Abstract

Cold stress profoundly affects plant growth and development and is a key factor affecting the geographic distribution and evolution of plants. Plants have evolved adaptive mechanisms to cope with cold stress. Here, through the genomic analysis of Arabidopsis, three Brassica species and 17 other representative species, we found that both cold-related genes (CRGs) and their collinearity were preferentially retained after polyploidization followed by genome instability, while genome-wide gene sets exhibited a variety of other expansion mechanisms. The cold-related regulatory network was increased in Brassicaceae genomes, which were recursively affected by polyploidization. By combining our findings regarding the selective retention of CRGs from this ecological genomics study with the available knowledge of cold-induced chromosome doubling, we hypothesize that cold stress may have contributed to the success of polyploid plants through both increasing polyploidization and selectively maintaining CRGs during evolution. This hypothesis requires further biological and ecological exploration to obtain solid supporting evidence, which will potentially contribute to understanding the generation of polyploids and to the field of ecological genomics.