Phylogeny and genetic structure in the genus Secale

PloS One
Öncü MaraciRaşit Bilgin

Abstract

Secale L. is a small but important genus that includes cultivated rye. Although genetic diversity of cultivated rye is high, patterns of genetic diversity in the whole genus, and potential factors affecting the distribution of genetic diversity remain elusive. The population structure and distribution of genetic variation within Secale, and its correlation with taxonomic delimitation, cultivation status or spatial distribution in relation to geography and climate zones were analyzed in this study. A collection of 726 individual plants derived from 139 different accessions representing Secale cereale, S. vavilovii, S. strictum, and S. sylvestre were investigated using SSR analysis and sequence diversity analysis of a nuclear EST region. Our results indicated that perennial S. strictum subspecies are genetically divergent from annual forms of the genus. Existence of two distinct clusters within the annual taxa was observed, one corresponding to samples from Asia, and a second to those outside of Asia. No clear genetic structure was observed between different annual species/subspecies, indicating introgression between these taxa. The analysis of cultivated rye revealed that landrace populations from the Middle East have the highes...Continue Reading

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Datasets Mentioned

BETA
MH421898-MH421958

Methods Mentioned

BETA
five hybrid
PCR
genotyping
PCA

Software Mentioned

DNAsp
Sequencher
Genepop
FSTAT
HP
RARE
MolKin
Poptree2
checker
PHASE

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