Comparative Analysis of Mitochondrial Genomes Provides Insights into the Mechanisms Underlying an S-type Cytoplasmic Male Sterility (CMS) System in Wheat (Triticum Aestivum L.)

Overview

Journal Funct Integr Genomics

Publisher Springer

Specialties Genetics
Molecular Biology

Date 2022 Jun 9

PMID 35678921

Authors

Rui Wang

Qingsong Ba

Lanlan Zhang

Weilun Wang

Pengfei Zhang

Guiping Li

Affiliations

Soon will be listed here.

Abstract

Cytoplasmic male sterility (CMS) has been widely used in crop cross breeding. There has been much research on wheat CMS. However, the correlation between S-type CMS and mitochondrial genome remains elusive. Herein, we sequenced the mitochondrial genome of wheat CMS line and compared it with the maintainer line. The results showed that the mitochondrial genome of CMS line encoded 26 tRNAs, 8 rRNAs, and 35 protein-coding genes, and the cob encoding complex III in which the protein coding gene is mutated. This protein is known to affect reactive oxygen (ROS) production. The analysis of ROS metabolism in developing anthers showed that the deficiency of antioxidants and antioxidant enzymes in the sterile system aggravated membrane lipid oxidation, resulting in ROS accumulation, and influencing the anther development. Herein, cob is considered as a candidate causative gene sequence for CMS.

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