An Overlooked Paleotetraploidization in Cucurbitaceae
| Autor: | Li Wang, Tianyu Lei, Xiyin Wang, Weina Ge, Sanwen Huang, Yuxian Li, Jigao Yu, Nanshan Yang, Yinmeng Liu, Lan Zhang, Jinshuai Sun, Tao Liu, Pengchuan Sun, Cong Zhang, Yinzhe Liu, Sainan Luo, Yue Xiao, Dongcen Ge, Di Guo, Xiaobo Cui, Jinpeng Wang, Xiaojian Liu, Xueqian Duan, Wei Chen, Dianchuan Jin, Shaoqi Shen, Zhenyi Wang, Yuxin Pan, Xiaoming Song, Ruiyan Xia, Min Yuan, Zhibo Li, Youting Kong, Zhonghua Zhang, Sangrong Sun, Guixian Yang, Xuelian Ma, Haiqing Xu |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Mutation rate Genomics Biology Genome Homology (biology) Evolution Molecular Polyploidy 03 medical and health sciences Mutation Rate Phylogenetics Genetic variation Genetics gene colinearity Molecular Biology Discoveries Phylogeny Ecology Evolution Behavior and Systematics Comparative genomics Base Sequence Chromosome Mapping Genetic Variation food and beverages homology Sequence Analysis DNA Tetraploidy Cucurbitaceae 030104 developmental biology Evolutionary biology Genome Plant |
| Zdroj: | Molecular Biology and Evolution |
| ISSN: | 1537-1719 0737-4038 |
| DOI: | 10.1093/molbev/msx242 |
| Popis: | Cucurbitaceae plants are of considerable biological and economic importance, and genomes of cucumber, watermelon, and melon have been sequenced. However, a comparative genomics exploration of their genome structures and evolution has not been available. Here, we aimed at performing a hierarchical inference of genomic homology resulted from recursive paleopolyploidizations. Unexpectedly, we found that, shortly after a core-eudicot-common hexaploidy, a cucurbit-common tetraploidization (CCT) occurred, overlooked by previous reports. Moreover, we characterized gene loss (and retention) after these respective events, which were significantly unbalanced between inferred subgenomes, and between plants after their split. The inference of a dominant subgenome and a sensitive one suggested an allotetraploid nature of the CCT. Besides, we found divergent evolutionary rates among cucurbits, and after doing rate correction, we dated the CCT to be 90–102 Ma, likely common to all Cucurbitaceae plants, showing its important role in the establishment of the plant family. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|