Medicine

Molecular phylogeny of the genus Triticum L.

Molecular phylogeny of the genus Triticum L.

Molecular phylogeny of the genus Triticum L.

Abstract

The genus Triticum L. includes the
major cereal crop, common or bread wheat
(hexaploid Triticum aestivum L.), and other
important cultivated species. Here, we conducted
a phylogenetic analysis of all known wheat species
and the closely related Aegilops species. This
analysis was based on chloroplast matK gene
comparison along with trnL intron sequences of
some species. Polyploid wheat species are successfully
divided only into two groups – Emmer
(sections Dicoccoides and Triticum) and Timopheevii
(section Timopheevii). Results reveal strictly
maternal plastid inheritance of synthetic wheat
amphiploids included in the study. A concordance
of chloroplast origin with the definite nuclear
genomes of polyploid species that were inherited
at the last hybridization events was found. Our
analysis suggests that there were two ancestral
representatives of Aegilops speltoides Tausch that
participated in the speciation of polyploid wheats
with B and G genome in their genome composition.
However, G genome species are younger in
evolution than ones with B genome. B genomespecific
PCR primers were developed for amplification
of Acc-1 gene.

 

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