Recent hybrid speciation at the origin of the narrow endemic Pulmonaria helvetica.

ABSTRACT:

Background and aims

Hybridization is known to drive plant speciation through the establishment of homoploid or allopolyploid hybrid species. Here we investigate the origin of Pulmonaria helvetica, a narrow endemic species described across a restricted area of Switzerland that was entirely covered by ice during the last glacial maximum. This species presents an original number of chromosomes (2n = 24) and morphological traits suggestive of a hybrid origin.

Methods

We sequenced a plastid locus and 1077 double-digest restriction-site-associated DNA (ddRAD) loci in 67 individuals from across the distribution range of P. helvetica and candidate progenitor species growing in the same area. Assignment of genotypes to main genetic clusters within and among taxa using STRUCTURE teste

SUBMITTER: Grunig S 

PROVIDER: S-EPMC7750729 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature