A likely paleo-autotetraploidization event shaped the high conservation of Nyssaceae genome  

作　　者：Yishan Feng Zhenyi Wang Qimeng Xiao Jia Teng Jianyu Wang Zijian Yu Jiaqi Wang Qiang Xu Yan Zhang Shaoqi Shen Shoutong Bao Yu Li Zimo Yan Yue Ding Zihan Liu Yuxian Li Tianyu Lei Min Yuan Xiu-Qing Li Jinpeng Wang 

机构地区：[1]Department of Bioinformatics,School of Life Sciences,North China University of Science and Technology,Tangshan,Hebei 063000,China [2]Fredericton Research and Development Centre,Agriculture and Agri-Food Canada,Fredericton,New Brunswick E3B 4Z7,Canada [3]State Key Laboratory of Systematic and Evolutionary Botany,Institute of Botany,Chinese Academy of Science,Beijing 100093,China [4]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Horticultural Plant Journal》2024年第3期911-930,共20页园艺学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.32170236,31501333,and 32000405);Natural Science Foundation of Hebei Province(Grant No.C2020209064);the Innovation and Entrepreneurship Training Program for College Students of North China University of Science and Technology(Grant No.X2019252)。

摘　　要：Scientific knowledge about the ancestral genome of core eudicot plant kingdom can potentially have profound impacts on both basic and applied research,including evolution,genetics,genomics,ecology,agriculture,forestry,and global climate.To investigate which plant conserves best the core eudicots common ancestor genome,we compared Arcto-Tertiary relict Nyssaceae and 30 other eudicot plant families.The genomes of Davidia involucrata(a known living fossil),Camptotheca acuminata and Nyssa sinensis,one per existent genus of Nyssaceae,were performed comparative genomic analysis.We found that Nyssaceae originated from a single Nyssaceae common tetraploidization event(NCT)-autotetraploidization 28-31 Mya after the core eudicot common hexaploidization(ECH).We identified Nyssaceae orthologous and paralogous genes,determined its chromosomal evolutionary trajectory,and reconstructed the Nyssaceae most recent ancestor genome.D.involucrata genome contained the entire seven paleochromosomes and 17 ECH-generated eudicot common ancestor chromosomes and was the slowest in mutation among the analyzed 42 species of 31 plant families.Combing both its high retention of paleochromosomes and its low mutation rate,D.involucrata provides the best case in conservation of the core eudicot paleogenome.

关 键 词：NYSSACEAE POLYPLOIDIZATION Multigenome alignment Evolutionary rate Autotetraploidization Karyotype evolution 

分 类 号：Q943.2[生物学—植物学]