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Transcriptome Analyses Indicate Significant Association of Increased Non-Additive and Allele-Specific Gene Expression with Hybrid Weakness in Rice (Oryza sativa L.)

文献类型： 外文期刊

作者： Wang, Yingheng 1 ; Xia, Jing 10 ; Huang, Likun 10 ; Lin, Qiang 1 ; Cai, Qiuhua 1 ; Xie, Hongguang 1 ; He, Wei 1 ; Wei, Yidong 1 ; Xie, Huaan 1 ; Tang, Weiqi 11 ; Wu, Weiren 10 ; Zhang, Jianfu 1 ;

作者机构： 1.Fujian Acad Agr Sci, Rice Res Inst, Fuzhou 350019, Peoples R China

2.Natl Rice Engn Res Ctr China, Fuzhou 350003, Peoples R China

3.State Key Lab Ecol Pest Control Fujian & Taiwan C, Fuzhou 350003, Peoples R China

4.Natl Key Lab Fujian Germplasm Innovat & Mol Breed, Fuzhou 350003, Peoples R China

5.State Key Lab Hybrid Rice, Base South China, Fuzhou 350003, Peoples R China

6.Minist Agr & Rural Affairs China, Key Lab Germplasm Innovat & Mol Breeding Hybrid R, Fuzhou 350003, Peoples R China

7.Natl Rice Improvement Ctr China, Fuzhou Branch, Fuzhou 350003, Peoples R China

8.Fujian Engn Lab Crop Mol Breeding, Fuzhou 350003, Peoples R China

9.Fujian Acad Agr Sci, Fujian Key Lab Rice Mol Breeding, Fuzhou 350003, Peoples R China

10.Fujian Agr & Forestry Univ, Coll Agr, Fuzhou 350002, Peoples R China

11.Minjiang Univ, Marine & Agr Biotechnol Lab, Fuzhou Inst Oceanog, Fuzhou 350108, Peoples R China

关键词： mid-parent hybrid weakness (MPHW); non-additive gene expression (NAE); allele-specific gene expression (ASE); transcriptome

期刊名称：LIFE-BASEL （ 影响因子：3.251； ）

ISSN：

年卷期： 2022 年 12 卷 8 期

页码：

收录情况： SCI

摘要： The heterosis in hybrid rice is highly affected by the environment and hybrid weakness occurs frequently depending on the genotypes of the hybrid and its parents. Hybrid weakness was also observed in our field experiments on nine rice hybrids produced by 3 x 3 incomplete diallel crosses. Among the nine hybrids, five displayed mid-parent heterosis (MPH) for grain yield per plant, while four showed mid-parent hybrid weakness (MPHW). A sequencing analysis of transcriptomes in panicles at the seed-filling stage revealed a significant association between enhanced non-additive gene expression (NAE) and allele-specific gene expression (ASE) with hybrid weakness. High proportions of ASE genes, with most being of mono-allele expression, were detected in the four MPHW hybrids, ranging from 22.65% to 45.97%; whereas only 4.80% to 5.69% of ASE genes were found in the five MPH hybrids. Moreover, an independence test indicated that the enhancements of NAE and ASE in the MPHW hybrids were significantly correlated. Based on the results of our study, we speculated that an unfavorable environment might cause hybrid weakness by enhancing ASE and NAE at the transcriptome level.

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