{Reference Type}: Journal Article
{Title}: Genetic characterization and fine mapping of a recessive genic male-sterile gene in flowering Chinese cabbage (Brassica rapa var. parachinensis).
{Author}: Wu Z;Yang Y;Li T;Shen Z;Zhou X;Zhang Y;
{Journal}: 3 Biotech
{Volume}: 14
{Issue}: 6
{Year}: 2024 Jun
{Factor}: 2.893
{DOI}: 10.1007/s13205-024-04005-7
{Abstract}: Brassica vegetables exhibit pronounced heterosis; nevertheless, investigations on fertility-related genes are scarce. The present study scrutinized a recessive genic male-sterile line, 7-3A, capable of generating a completely sterile population, holding significant promise for flowering Chinese cabbage breeding. By whole-genome resequencing of sterile and fertile plants, the male-sterile gene was confined to approximately 185 kb on chromosome A07, situated between markers C719 and NP10 in Brassica rapa var. Chiifu-401. Notably, substantial structural variation was identified within this region across diverse Brassica rapa reference genomes. Despite discernible expression level disparities of a homologous gene, Bnams4b, between male sterile and fertile plants, no sequence divergence was detected. Further elucidation is required to pinpoint a novel sterile gene within the candidate interval. This investigation contributes to the advancement of both the molecular-assisted breeding scheme for flowering Chinese cabbage and the comprehension of male sterility mechanisms.<BR><B>UNASSIGNED: </B>The online version contains supplementary material available at 10.1007/s13205-024-04005-7.