Chromosomal diversification and karyotype evolution of diploids in the cytologically diverse genus Prospero (Hyacinthaceae).

ABSTRACT:

Background

Prospero (Hyacinthaceae) provides a unique system to assess the impact of genome rearrangements on plant diversification and evolution. The genus exhibits remarkable chromosomal variation but very little morphological differentiation. Basic numbers of x = 4, 5, 6 and 7, extensive polyploidy, and numerous polymorphic chromosome variants were described, but only three species are commonly recognized: P. obtusifolium, P. hanburyi, and P. autumnale s.l., the latter comprising four diploid cytotypes. The relationship between evolutionary patterns and chromosomal variation in diploids, the basic modules of the extensive cytological diversity, is presented.

Results

Evolutionary inferences were derived from fluorescence in situ hybridization (FISH) with 5S and 35S rDNA, g

SUBMITTER: Jang TS 

PROVIDER: S-EPMC3728210 | biostudies-literature | 2013 Jul

REPOSITORIES: biostudies-literature