Comparative Transcriptome Analysis Reveals Key Insights into Fertility Conversion in the Thermo-Sensitive Cytoplasmic Male Sterile Wheat
文献类型： 外文期刊
作者： Liu, Zihan 1 ; Niu, Fuqiang 1 ; Yuan, Shaohua 1 ; Feng, Shuying 3 ; Li, Yanmei 1 ; Lu, Fengkun 1 ; Zhang, Tianbao 1 ; Bai, Jianfang 1 ; Zhao, Changping 1 ; Zhang, Liping 1 ;
作者机构： 1.Beijing Acad Agr & Forestry Sci, Inst Hybrid Wheat, Beijing Key Lab Mol Genet Hybrid Wheat, Beijing 100097, Peoples R China
2.Northwest A&F Univ, Coll Agron, Xianyang 712100, Peoples R China
3.Blue Red Hybrid Wheat Res Ctr, Xianyang 044000, Peoples R China
关键词： fertility conversion; cytoplasmic male sterility; transcriptome sequencing; hybrid wheat
期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：6.208； 五年影响因子：6.628 ）
ISSN：
年卷期： 2022 年 23 卷 22 期
页码：
收录情况： SCI
摘要： Thermo-sensitive cytoplasmic male sterility (TCMS) plays a crucial role in hybrid production and hybrid breeding; however, there are few studies on molecular mechanisms related to anther abortion in the wheat TCMS line. In this study, FA99, a new wheat thermo-sensitive cytoplasmic male sterility line, was investigated. Fertility conversion analysis showed that FA99 was mainly controlled by temperature, and the temperature-sensitive stage was pollen mother cell formation to a uninucleate stage. Further phenotypic identification and paraffin section showed that FA99 was characterized by indehiscent anthers and aborted pollen in a sterile environment and tapetum was degraded prematurely during the tetrad period, which was the critical abortion period of FA99. The contents of O2-, H2O2, MDA and POD were significantly changed in FA99 under a sterile environment by the determination of physiological indexes. Furthermore, through transcriptome analysis, 252 differentially expressed genes were identified, including 218 downregulated and 34 upregulated genes. Based on KOG function classification, GO enrichment and KEGG pathways analysis, it was evident that significant transcriptomic changes in FA99 under different fertility environments, and the major differences were "phenylalanine metabolism", "phenylpropanoid biosynthesis", "cutin, suberine and wax biosynthesis", "phenylalanine, tyrosine and tryptophan biosynthesis" and "citrate cycle (TCA cycle)". Finally, we proposed an intriguing transcriptome-mediated pollen abortion and male sterility network for FA99. These findings provided data on the molecular mechanism of fertility conversion in thermo-sensitive cytoplasmic male sterility wheat.
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