Characterization and fine mapping of <i>Double-grain</i> (<i>Dgs</i>) mutant in sorghum [<i>Sorghum bicolor</i> (L.) Moench].

ABSTRACT: The sorghum inflorescence is consisted of sessile (SS) and pedicellate spikelets (PS). Commonly, only SS could produce seeds and each spikelet produces one single seed. Here, we identified a sorghum mutant, named Double-grain (Dgs), which can produce twin seeds in each pair of glumes. We characterized the developmental process of inflorescence in Dgs and Jinliang 5 (Jin5, a single-seeded variety) using scanning electron microscope (SEM). The results showed that at the stamen and pistil differentiation stage, Dgs could develop two sets of stamens and carpels in one sessile floret, which resulted in twin-seeded phenotype in Dgs. Two F₂ mapping populations derived from the cross between Jin5 and Dgs, and BTx622B and Dgs, were constru

SUBMITTER: Liang S 

PROVIDER: S-EPMC11496449 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature