Mutations in BrRBM25 encoding an RNA binding motif protein cause premature bolting in Chinese cabbage.

Bolting is an important agronomic character, and premature bolting leads to insufficient leafy head, which further affects the yield and quality of Chinese cabbage. In this study, two allelic early-bolting mutants ebm11-1 and ebm11-2 were isolated from a Chinese cabbage DH line 'FT' by EMS-mutagenesis. Genetic analysis showed that a single recessive nuclear gene controlled the mutant traits of these two mutants.

Fine mapping and expression characteristics analysis of male-sterile gene BrRNR1 in Chinese cabbage (Brassica rapa L. ssp. pekinensis).

Background: Chinese cabbage is a cross-pollinated crop with remarkable heterosis, and male-sterile line is an important mean to produce its hybrids. In this study, a male-sterile mutant msm7 was isolated from a Chinese cabbage DH line 'FT' by using EMS-mutagenesis.

Results: Compared with the wild-type 'FT', the anthers of mutant msm7 were completely aborted, accompanied by the defects in leaf and petal development.

Mutations in BrABCG26, encoding an ATP-binding cassette transporter, are responsible for male sterility in Chinese cabbage (Brassica rapa L. ssp. pekinensis).

The gene BrABCG26 responsible for male sterility of Chinese cabbage was confirmed by two allelic mutants. Male-sterile lines are an important way of heterosis utilization in Chinese cabbage. In this study, two allelic male-sterile mutants msm3-1 and msm3-2 were obtained from a Chinese cabbage double haploid (DH) line 'FT' by using EMS-mutagenesis.

BrKAO2 mutations disrupt leafy head formation in Chinese cabbage (Brassica rapa L. ssp. pekinensis).

The role of BrKAO2 in leafy head formation was confirmed by using two allelic Chinese cabbage mutants. Chinese cabbage yield and quality are determined by leafy head formation. Cloning and characterising the key genes regulating leafy head formation are essential for its varietal improvement.