Transcriptome profiling of two super hybrid rice provides insights into the genetic basis of heterosis

文献类型： 外文期刊

第一作者： Fu, Jun

作者： Fu, Jun;Yan, Tianze;Li, Yanfeng;Jiang, Nan;Zhou, Yanbiao;Zhou, Qunfeng;Qin, Peng;Fu, Chenjian;Lin, Haiyan;Zhong, Jing;Wang, Kai;Yang, Yuanzhu;Zhang, Yilin;Han, Xue;Lin, Zechuan;He, Hang;Zhang, Yilin;Han, Xue;Lin, Zechuan;He, Hang;Wang, Fei;Wang, Kai;Yang, Yuanzhu;Wang, Kai;Yang, Yuanzhu

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关键词： Heterosis; Transcriptome; Hybrid-rice; Allele-specific expression

期刊名称：BMC PLANT BIOLOGY （ 影响因子：5.26； 五年影响因子：5.761 ）

ISSN： 1471-2229

年卷期： 2022 年 22 卷 1 期

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收录情况： SCI

摘要： Background: Heterosis is a phenomenon that hybrids show superior performance over their parents. The successful utilization of heterosis has greatly improved rice productivity, but the molecular basis of heterosis remains largely unclear. Results: Here, the transcriptomes of young panicles and leaves of the two widely grown two-line super hybrid rice varieties (Jing-Liang-You-Hua-Zhan (JLYHZ) and Long-Liang-You-Hua-Zhan (LLYHZ)) and their parents were analyzed by RNA-seq. Transcriptome profiling of the hybrids revealed 1,778 similar to 9,404 differentially expressed genes (DEGs) in two tissues, which were identified by comparing with their parents. GO, and KEGG enrichment analysis showed that the pathways significantly enriched in both tissues of two hybrids were all related to yield and resistance, like circadian rhythm (GO:0,007,623), response to water deprivation (GO:0,009,414), and photosynthetic genes (osa00196). Allele-specific expression genes (ASEGs) were also identified in hybrids. The ASEGs were most significantly enriched in ionotropic glutamate receptor signaling pathway, which was hypothesized to be potential amino acid sensors in plants. Moreover, the ASEGs were also differentially expressed between parents. The number of variations in ASEGs is higher than expected, especially for large effect variations. The DEGs and ASEGs are the potential reasons for the formation of heterosis in the two elite super hybrid rice. Conclusions: Our results provide a comprehensive understanding of the heterosis of two-line super hybrid rice and facilitate the exploitation of heterosis in hybrid rice breeding with high yield heterosis.

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