Lack of ITS sequence homogenization in Erysimum species (Brassicaceae) with different ploidy levels.

ABSTRACT: The internal transcribed spacers (ITS) exhibit concerted evolution by the fast homogenization of these sequences at the intragenomic level. However, the rate and extension of this process are unclear and might be conditioned by the number and divergence of the different ITS copies. In some cases, such as hybrid species and polyploids, ITS sequence homogenization appears incomplete, resulting in multiple haplotypes within the same organism. Here, we studied the dynamics of concerted evolution in 85 individuals of seven plant species of the genus Erysimum (Brassicaceae) with multiple ploidy levels. We estimated the rate of concerted evolution and the degree of sequence homogenization separately for ITS1 and ITS2 and whether these varied with ploidy. Our results showed incomplete sequence hom

SUBMITTER: Osuna-Mascaro C 

PROVIDER: S-EPMC9546898 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature