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Differences in homologous and heterologous nucleocytoplasmic interactions of cytoplasmic male sterility lines in Gossypium barbadense

文献类型： 外文期刊

作者： You, Jingyi 1 ; Li, Min 3 ; Kong, Xiangjun 4 ; Hou, Qingguang 5 ; Li, Hongwei 6 ; Li, Bin 1 ; Zhou, Qiong 1 ; Zhou, Ruiyang 1 ;

作者机构： 1.Guangxi Univ, Coll Agr, Key Lab Plant Genet & Breeding, Nanning 530006, Peoples R China

2.Guangxi Acad Agr Sci, Hort Res Inst, Nanning 530007, Peoples R China

3.Guangxi Acad Sci, Natl Engn Res Ctr Nonfood Biorefinery, Natl key Lab Nonfood Biomass Energy Technol, 98 Daling Rd, Nanning 530007, Peoples R China

4.Henan Inst Sci & Technol, Sch Life Sci & Technol, Xinxiang 453003, Peoples R China

5.Guangxi Acad Agr Sci, Hechi Inst Agr Sci, Hechi Branch, Hechi 546306, Guangxi, Peoples R China

6.Shaoyang Univ, Coll Agr & Forestry Ecol, Shaoyang 422000, Peoples R China

关键词： Cotton; CMS line with homologous cytoplasm and its nucleus; CMS line with heterologous cytoplasm and its nucleus; Mitochondrial genome; Reactive oxygen species; Mitochondrial genome structural variation

期刊名称：SCIENTIFIC REPORTS （ 影响因子：3.9； 五年影响因子：4.3 ）

ISSN： 2045-2322

年卷期： 2025 年 15 卷 1 期

页码：

收录情况： SCI

摘要： The utilization of crop hybrids plays an important role in crop breeding and production, and the innovation of the male sterile germplasm is the basis for this utilization. Cotton has a very clear hybrid advantage, and the hybrid advantage in yield and quality has been widely utilized in cotton breeding. However, the exploitation of heterosis in cotton is currently dominated by cytoplasmic male sterility (CMS) lines. These CMS lines are found only in Harknessi cotton. They have a single cytoplasmic origin. Additionally, they exhibit a significant negative effect of cytoplasmic-nuclear interactions. To minimize this effect, it is necessary to select and breed CMS lines. In these CMS lines, both the cytoplasm and nucleus should originate from the same variety. However, no homologous cytoplasmic-nuclear CMS germplasm has been created, and its mechanism of occurrence has not been determined. In this study, two homologous cytoplasmic-nuclear CMS lines and two heterologous cytoplasmic-nuclear CMS lines were utilized, and the heterologous cytoplasmic-nuclear CMS lines were aborted at a relatively early stage. The physiological indexes related to reactive oxygen species ROS-mediated metabolic processes in the heterologous cytoplasmic-nuclear CMS lines were lower than those of the homologous cytoplasmic-nuclear CMS lines, including the enzyme activities of POD and CAT from tetrad to mature pollen grain, and the metabolite content of malondialdehyde (MDA) was inversely correlated with the enzyme activities of the heterologous cytoplasmic-nuclear CMS lines. Resequencing analysis of four cotton mitochondrial genomes (mt genomes) revealed that the heterologous cytoplasmic-nuclear CMS lines were more complex than the homologous cytoplasmic-nuclear CMS lines, and the homologous CMS lines showed a higher degree of collinearity with the maintainer lines. This indicates that heterologous cytoplasmic-nuclear interactions are more likely to lead to mtDNA structural variation. Taken together, the results showed that the cytoplasmic-nuclear homologous system was less affected by the cytoplasmic-nuclear interaction and was the best combination for the study of male sterility.

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