Open AccessPhylogenetic relationships in the genus Avena based on the nuclear Pgk1 gene
Author(s) -
Yuanying Peng,
Pingping Zhou,
Jun Zhao,
Junzhuo Li,
Shikui Lai,
Nicholas A. Tinker,
Shu Liao,
Huihuang Yan
Publication year - 2018
Publication title -
plos one
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.99
H-Index - 332
ISSN - 1932-6203
DOI - 10.1371/journal.pone.0200047
Subject(s) - genome , biology , polyploid , ploidy , phylogenetic tree , genetics , nuclear gene , phylogenetics , evolutionary biology , genome size , gene , haplotype , genome evolution , allele
The phylogenetic relationships among 76 Avena taxa, representing 14 diploids, eight tetraploids, and four hexaploids were investigated by using the nuclear plastid 3-phosphoglycerate kinase gene ( Pgk1 ). A significant deletion (131 bp) was detected in all the C genome homoeologues which reconfirmed a major structural divergence between the A and C genomes. Phylogenetic analysis indicated the C p genome is more closely related to the polyploid species than is the C v genome. Two haplotypes of Pgk1 gene were obtained from most of the AB genome tetraploids. Both types of the barbata group showed a close relationship with the A s genome diploid species, supporting the hypothesis that both the A and B genomes are derived from an A s genome. Two haplotypes were also detected in A . agadiriana , which showed close relationships with the A s genome diploid and the A c genome diploid, respectively, emphasizing the important role of the A c genome in the evolution of A . agadiriana . Three homoeologues of the Pgk1 gene were detected in five hexaploid accessions. The homoeologues that might represent the D genome were tightly clustered with the tetraploids A . maroccana and A . murphyi , but did not show a close relationship with any extant diploid species.