Patterns of genetic and eco-geographical diversity in Spanish barleys
Igartua Arregui, Ernesto
Ramsay, Luke D.
Molina Cano, José Luis
Ciudad, F. J.
Lasa Dolhagaray, José Manuel
Gracia Gimeno, Ma. Pilar
Casas Cendoya, Ana Maria
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The pool of Western Mediterranean landraces has been under-utilised for barley breeding so far. The objectives of this study were to assess genetic diversity in a core collection of inbred lines derived from Spanish barley landraces to establish its relationship to barleys from other origins, and to correlate the distribution of diversity with geographical and climatic factors. To this end, 64 SSR were used to evaluate the polymorphism among 225 barley (Hordeum vulgare ssp. vulgare) genotypes, comprising two-row and six-row types. These included 159 landraces from the Spanish barley core collection (SBCC) plus 66 cultivars, mainly from European countries, as a reference set. Out of the 669 alleles generated, a large proportion of them were unique to the six-row Spanish barleys. An analysis of molecular variance revealed a clear genetic divergence between the six-row Spanish barleys and the reference cultivars, whereas this was not evident for the two-row barleys. A model-based clustering analysis identified an underlying population structure, consisting of four main populations for the whole genotype set, and suggested further possible subdivision within two of these populations. Most of the six-row Spanish landraces clustered into two groups that corresponded to geographic regions with contrasting environmental conditions. The existence of wide genetic diversity in Spanish germplasm, possibly related to adaptation to a broad range of environmental conditions, and its divergence from current European cultivars confirm its potential as a new resource for barley breeders, and make the SBCC a valuable tool for the study of adaptation in barley.
Is part ofTheoretical and Applied Genetics, 2008, vol. 116, núm. 2, p. 271–282
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Gracia Gimeno, Ma. Pilar; Mansour Elsayed, Elsayed; Casas Cendoya, Ana Maria; Lasa Dolhagaray, José Manuel; Medina Abad, Blanca; Molina Cano, José Luis; Moralejo Vidal, Mª Angeles; López, Alberto; López Fuster, Prudencio; Escribano, J.; Ciudad, F. J.; Codesal, P.; Montoya, J. L.; Igartua Arregui, Ernesto (Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (Espanya), 2012)The Spanish Barley Breeding Program is carried out by four public research organizations, located at the most representative barley growing regions of Spain. The aim of this study is to evaluate the program retrospectively, ...
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Resequencing the Vrs1 gene in Spanish barley landraces revealed reversion of six-rowed to two-rowed spike Casas Cendoya, Ana Maria; Contreras‐Moreira, Bruno; Cantalapiedra, Carlos P.; Sakuma, Shun; Gracia Gimeno, Ma. Pilar; Moralejo Vidal, Mª Angeles; Molina Cano, José Luis; Komatsuda, Takao; Igartua Arregui, Ernesto (Springer Science+Business Media B.V., part of Springer Nature, 2018-04-12)Six-rowed spike 1 (Vrs1) is a gene of major importance for barley breeding and germplasm management as it is the main gene determining spike row-type (2-rowed vs. 6-rowed). This is a widely used DUS trait, and has been ...