Diploid Male Gametes Circumvent Hybrid Sterility Between Asian and African Rice Species.

ABSTRACT: In F₁ hybrids of Oryza sativa (Asian rice) and Oryza glaberrima (African rice), heterozygosity leads to a complete gamete abortion because of allelic conflict at each of the 13 hybrid sterility (HS) loci. We systematically produced 19 plants from the F₁ hybrids of both the rice species by the anther culture (AC) method. Five of the 19 interspecific hybrid plants were partially fertile and able to produce seeds. Unlike ordinal doubled haploid plants resulting from AC, these regenerated plants showed various ploidy levels (diploid to pentaploid) and different zygosities (completely homozygous, completely heterozygous, and a combination). These properties were attributable to meiotic anomalies in the interspecific hybrid F₁ plants.

SUBMITTER: Kuniyoshi D 

PROVIDER: S-EPMC7674174 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature