Relationships in the barley genus (Hordeum): an electrophoretic examination of proteins
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The relationships between all known Hordeum species except H. guatemalense were inferred from the electrophoresis of the six enzyme systems Got, 6-Pgd, Mdh, Idh, a-and B-amylases, and most of the polyploid cytotypes in the genus seemed to have originated as alloploids.Abstract:
The relationships between all known Hordeum species except H. guatemalense were inferred from the electrophoresis of the six enzyme systems Got, 6-Pgd, Mdh, Idh, a-and B-amylases. A total of eleven loci were scored for in these systems. Maximum likelihood clusters and Wagner networks calculated from the electrophoretic data divided the genus into three groups, viz. the “H. vulgare group”, the “H. marinum group” and the “H. pubiflorum group”. Only one of these groups was recognized in the morphological sectioning of the genus. Most of the polyploid cytotypes in the genus seemed to have originated as alloploids. Phylogenetic links between diploid and polyploid taxa are suggested from the enzyme phenotypes. An evolutionary theory for the genus Hordeum is proposed, with two centres of differentiation, in South-West Asia and South America, respectively.read more
Citations
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The Use of Molecular and Biochemical Markers in Crop Evolution Studies
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Isozymic Evidence and the Evolution of Crop Plants
TL;DR: There is nothing in nature that faintly resembles such human creations as an ear of corn, a head of cauliflower, or the curiously sculptured fruit of an ornamental gourd, but crop species often show such wide morphological departures from their nearest wild relatives that the link between them cannot be established with certainty.
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Comparative physical mapping of the 5S and 18S-25S rDNA in nine wild Hordeum species and cytotypes.
TL;DR: The results indicate that the species H. vulgare sensu lato and H. brevisubulatum 4x have a complex evolutionary history, probably involving the multiplication of minor rDNA sites, or the incorporation of both I and H types of genome, and are useful for an investigation of chromosome evolution and phylogeny.
Journal ArticleDOI
Origin of North American Elymus (Poaceae: Triticeae) Allotetraploids Based on Granule-bound Starch Synthase Gene Sequences
TL;DR: The hypothesis that Pseudoroegneria and Hordeum are the genome donors to the North American Elymus tetraploids supports the hypothesis that groups delimited by cytogenetic data do in fact correspond to evolutionary lineages.
Journal ArticleDOI
Phylogenetic analysis of the genus Hordeum using repetitive DNA sequences.
Sergei Svitashev,Tomas Bryngelsson,Alexander V. Vershinin,Carsten Pedersen,Torbjörn Säll,R. von Bothmer +5 more
TL;DR: A hypothesis concerning the possible origin and phylogeny of the polyploid barley species H. bulbosum is presented, which supports previous molecular studies of barley species where the unique position of H. bulbsum has been pointed out.
References
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Methods for Computing Wagner Trees
TL;DR: The concept of a Wagner Network is formalized and a number of algorithms for calculating such networks are discussed and the rationale for the methods described is discussed.
Book ChapterDOI
The Genomic System of Classification as a Guide to Intergeneric Hybridization with the Perennial Triticeae
TL;DR: Perennials of the tribe Triticeae include many of the world’s important forage grasses and form a vast genetic reservoir that might be used to improve the annual cereals.
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Systematic Value of Electrophoretic Data
TL;DR: A survey of the literature indicates that when such arrangements are made, they usually correspond very closely to previously recognized relationships of various species groups based on classical systematic criteria, which makes it clear that electrophoretic techniques will provide an extremely valuable tool for systematists.