数字农科院2.0

Genome-Wide Identification And Analysis Of T.he Ein3/Eil Gene Family I n Allotetraploid Brassica Napus Reveal Its Potential Advantages During Polyploidization

文献类型： 外文期刊

作者： Li, MD; Wang, RH; Liang, ZW; Wu, XM; Wang, JB

作者机构：

关键词： EIN3/EIL gene family; Cis-element; Introns; Allotetraploid; Brassica napus; Polyploidization

期刊名称： BMC PLANT BIOLOGY

ISSN： 1471-2229

年卷期： 2019 年 19 卷

页码：

收录情况： JCR（2021版）

摘要： Background: Polyploidization is a common event in the evolutionary history of angiosperms, and there will be some changes in the genomes of plants other than a simple genomic doubling after polyploidization. Allotetraploid Brassica napus and its diploid progenitors (B. rapa and B. oleracea) are a good group for studying the problems associated with polyploidization. On the other hand, the EIN3/EIL gene family is an important gene family in plants, all members of which are key genes in the ethylene signaling pathway. Until now, the EIN3/EIL gene family in B. napus and its diploid progenitors have been largely unknown, so it is necessary to comprehensively identify and analyze this gene family. Results: In this study, 13, 7 and 7 EIN3/EIL genes were identified in B. napus (2n = 4x = 38, A(n)C(n)), B. rapa (2n = 2x = 20, A(r)) and B. oleracea (2n = 2x = 18, C-o). All of the identified EIN3/EIL proteins were divided into 3 clades and further divided into 8 sub-clades. Ka/Ks analysis showed that all identified EIN3/EIL genes underwent purifying selection after the duplication events. Moreover, gene structure analysis showed that some EIN3/EIL genes in B. napus acquired introns during polyploidization, and homolog expression bias analysis showed that B. napus was biased towards its diploid progenitor B. rapa. The promoters of the EIN3/EIL genes in B. napus contained more cis-acting elements, which were mainly involved in endosperm gene expression and light responsiveness, than its diploid progenitors. Thus, B. napus might have potential advantages in some biological aspects. Conclusions: The results indicated allotetraploid B. napus might have potential advantages in some biological aspects. Moreover, our results can increase the understanding of the evolution of the EIN3/EIL gene family in B. napus, and provided more reference for future research about polyploidization.

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