A wide range of chromosome numbers result from unreduced gamete production in Brassica juncea × B. napus (AABC) interspecific hybrids.

ABSTRACT: The establishment of successful interspecies hybrids requires restoration of a stable "2n" chromosome complement which can produce viable "n" gametes. This may occur (rarely) via recombination between non-homologous chromosomes, or more commonly is associated with a doubling of parental chromosome number to produce new homologous pairing partners in the hybrid. The production of unreduced "2n" gametes (gametes with the somatic chromosome number) may therefore be evolutionarily useful by serving as a key pathway for the formation of new polyploid hybrids, as might specific mechanisms permitting recombination between non-homologous chromosomes. Here, we investigated chromosome complements and fertility in third generation interspecific hybrids (AABC) resulting from a cross between allopolypl

SUBMITTER: Addo Nyarko C 

PROVIDER: S-EPMC11799209 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature