Analysis of Transcriptional Changes in Different Brassica napus Synthetic Allopolyploids
文献类型: 外文期刊
第一作者: Wei, Yunxiao
作者: Wei, Yunxiao;Li, Guoliang;Zhang, Shujiang;Zhang, Shifan;Zhang, Hui;Sun, Rifei;Li, Fei;Wei, Yunxiao;Zhang, Rui
作者机构:
关键词: Brassica napus; allopolyploid; transcriptome; expression level dominance; trait separation
期刊名称:GENES ( 影响因子:4.096; 五年影响因子:4.339 )
ISSN:
年卷期: 2021 年 12 卷 1 期
页码:
收录情况: SCI
摘要: Allopolyploidy is an evolutionary and mechanistically intriguing process involving the reconciliation of two or more sets of diverged genomes and regulatory interactions, resulting in new phenotypes. In this study, we explored the gene expression patterns of eight F2 synthetic Brassica napus using RNA sequencing. We found that B. napus allopolyploid formation was accompanied by extensive changes in gene expression. A comparison between F2 and the parent shows a certain proportion of differentially expressed genes (DEG) and activation\silent gene, and the two genomes (female parent (AA)\male parent (CC) genomes) showed significant differences in response to whole-genome duplication (WGD); non-additively expressed genes represented a small portion, while Gene Ontology (GO) enrichment analysis showed that it played an important role in responding to WGD. Besides, genome-wide expression level dominance (ELD) was biased toward the AA genome, and the parental expression pattern of most genes showed a high degree of conservation. Moreover, gene expression showed differences among eight individuals and was consistent with the results of a cluster analysis of traits. Furthermore, the differential expression of waxy synthetic pathways and flowering pathway genes could explain the performance of traits. Collectively, gene expression of the newly formed allopolyploid changed dramatically, and this was different among the selfing offspring, which could be a prominent cause of the trait separation. Our data provide novel insights into the relationship between the expression of differentially expressed genes and trait segregation and provide clues into the evolution of allopolyploids.
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