Genome composition in Brassica interspecific hybrids affects chromosome inheritance and viability of progeny.

ABSTRACT: Interspecific hybridization is widespread in nature and can result in the formation of new hybrid species as well as the transfer of traits between species. However, the fate of newly formed hybrid lineages is relatively understudied. We undertook pairwise crossing between multiple genotypes of three Brassica allotetraploid species Brassica juncea (2n = AABB), Brassica carinata (2n = BBCC), and Brassica napus (2n = AACC) to generate AABC, BBAC, and CCAB interspecific hybrids and investigated chromosome inheritance and fertility in these hybrids and their self-pollinated progeny. Surprisingly, despite the presence of a complete diploid genome in all hybrids, hybrid fertility was very low. AABC and BBAC first generation (F₁) hybrids both averaged ~16% pollen viability compared to

SUBMITTER: Katche E 

PROVIDER: S-EPMC10439240 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature