Genetic control of flowering in greater yam (Dioscorea alata L.).

ABSTRACT:

Background

Greater yam (Dioscorea alata L.) is a major tropical and subtropical staple crop cultivated for its starchy tubers. Breeding of this dioecious species is hampered by its erratic flowering, yet little is currently known on the genetic determinism of its sexual reproduction.

Result

Here we used a genome-wide association approach and identified a major genetic barrier to reproduction in yam on chromosome 1, as represented by two candidate genes. A deleterious effect on male fitness could be hypothesized considering the involvement of these two genes in male reproduction and the low frequency of this non-flowering dominant allele within the male genepool. We also extended the hypothesis of a XX/XY sex-determination system located on chromosome 6 in D. alata to encompa

SUBMITTER: Cormier F 

PROVIDER: S-EPMC8015048 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature