Characterization and transcriptome analysis of a dominant genic male sterile cotton mutant.

ABSTRACT:

Background

Male sterility is an efficient trait for hybrid seed production and germplasm innovation. Until now, most studies on male sterility were on cytoplasmic and recessive genic sterility, with few on dominant genic male sterility, especially in cotton, due to lack of such mutant.

Results

We discovered a natural male sterile (MS) Sea Island cotton (G. barbadense) mutant. Genetic analysis showed the mutation was caused by a dominant mutation in a single nuclear gene. Comparative cytological observation of anther sections from MS and wild-type (WT) uncovered cellular differences in anther at and after the tetrad stage of pollen mother cells (PMC). In the MS anthers, the outer wall of pollen grains was free of spinules, the tapetum was vacuolated and showed delayed degrada

SUBMITTER: Cheng XQ 

PROVIDER: S-EPMC7333317 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature