Phylogenetic relationships in genus Arachis based on ITS and 5.8S rDNA sequences.

ABSTRACT:

Background

The genus Arachis comprises 80 species and it is subdivided into nine taxonomic sections (Arachis, Caulorrhizae, Erectoides, Extranervosae, Heteranthae, Procumbentes, Rhizomatosae, Trierectoides, and Triseminatae). This genus is naturally confined to South America and most of its species are native to Brazil. In order to provide a better understanding of the evolution of the genus, we reconstructed the phylogeny of 45 species using the variation observed on nucleotide sequences in internal transcribed spacer regions (ITS1 and ITS2) and 5.8 S of nuclear ribosomal DNA.

Results

Intraspecific variation was detected, but in general it was not enough to place accessions of the same species in different clades. Our data support the view that Arachis is a monophyletic gro

SUBMITTER: Bechara MD 

PROVIDER: S-EPMC3095334 | biostudies-literature | 2010 Nov

REPOSITORIES: biostudies-literature