The genus Dasypyrum––part 1. The taxonomy and relationships within Dasypyrum and with Triticeae species

Abstract

The article is an attempt to summarize available information about the relationships within Dasypyrum (Triticeae, Poaceae) and between Dasypyrum and other genera in the Triticeae. A relationship between the annual diploid D. villosum (L.) P. Candargy and the perennial tetraploid D. breviaristatum (L.) Frederiksen is discussed on the basis of cytological and molecular investigations. Although the relationship between the two Dasypyrum species seems to be quite close, D. breviaristatum is an autotetraploid with a basic genome different from that of D. villosum. The position of Dasypyrum in relation to other Triticeae is summarized, with special attention being paid to the Triticum and Secale. The closer relationship of Dasypyrum with Secale in comparison to Triticum seems to be reliable, even if only few intergeneric hybrids have been produced. It may be related to the fact that only a few experiments on production of those hybrids have been conducted till the present day, in contrast to experiments concerning hybrids with Triticum.

Molecular and Cytogenetic Characterization of New Wheat—Dasypyrum breviaristatum Derivatives with Post-Harvest Re-Growth Habit

“…The genus Dasypyrum (or Haynaldia ) consists of two species, Dasypyrum villosum and D. breviaristatum. Cytological and molecular evidence suggest significant genomic diversification between the two species, and therefore the genome symbols of D. villosum and D. breviaristatum were assigned to V and V b , respectively [ 1 , 2 ]. Recently, Baum et al [ 3 ] suggested the genome constitution of tetraploid D. breviaristatum as VVV b V b (2 n = 4 x = 28) based on the evolutionary analysis of the nr5S DNA multi-gene family.…”

A Novel Wheat-<b><i>Dasypyrum breviaristatum </i></b>Substitution Line with Stripe Rust Resistance

“…The genus Dasypyrum (or Haynaldia ) consists of 2 species: Dasypyrum villosum and D. breviaristatum. Both species are native to the Mediterranean environment and are distributed in the mountainous regions of Europe and Africa [Gradzielewska, 2006a;De Pace et al, 2011]. Cytological and molecular evidences suggest significant genomic diversification between the 2 species, and therefore, the genomes of D. villosum and D. breviaristatum were assigned the genomic symbols V and V b , respectively [Gradzielewska, 2006a;Liu et al, 2010].…”

“…Both species are native to the Mediterranean environment and are distributed in the mountainous regions of Europe and Africa [Gradzielewska, 2006a;De Pace et al, 2011]. Cytological and molecular evidences suggest significant genomic diversification between the 2 species, and therefore, the genomes of D. villosum and D. breviaristatum were assigned the genomic symbols V and V b , respectively [Gradzielewska, 2006a;Liu et al, 2010]. Within both species of Dasypyrum , several agronomically important traits, including those of disease resistance, high protein quality, and drought tolerance, have been identified and offer valuable resources for wheat improvement [Gradzielewska, 2006b;De Pace et al, 2011].…”

Isolation and phylogenetic analysis of novel γ-gliadin genes in genus Dasypyrum

“…D. breviaristatum consists of diploid (2n = 2x = 14, V b V b ) and tetraploid (2n = 4x = 14, V b V b V b V b ) cytotypes. They are perennial allogamous species restricted to two mountainous regions in northwest Africa and in Greece and Morocco (Gradzielewska, 2006a). Species of the genus Dasypyrum contain many agronomically useful genes, which could be of value in wheat breeding for multi-disease resistance, better quality and high yield (Gradzielewska, 2006b).…”