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Title

Low responsiveness of six-rowed genotypes to androgenesis in barley does not have a pleiotropic basis

AuthorsCastillo Alonso, Ana María ; Cistué Sola, Luis ; Romagosa, Ignacio; Vallés Brau, María Pilar
Keywordsvrs1 locus
Pleiotropy
Mutation
Linkage
Barley
Androgenesis
Issue DateOct-2001
PublisherNRC Research Press
CitationGenome 44 (5): 936-940 (2001)
AbstractA heterozygous mutant for the two- and six-rowed character was isolated in the barley cultivar Igri through application of sodium azide to isolated microspore cultures and posterior regeneration. Six-rowed and two-rowed homozygotic plants were subsequently identified in the self-pollinated M2 progenies of the original heterozygous M1. Detailed molecular markers confirmed the isogenic nature of this recovered mutant and the original cultivar Igri. A comparative study of the anther culture response of this six-rowed induced mutant vs. diploid 'Igri' was performed to assess whether the two- or six-rowed gene influences anther culture response in barley through a pleiotropic effect or via linkage disequilibrium. No significant differences for any of the recorded variables throughout the in vitro regeneration process were detected between the 'Igri' six-rowed mutant and any of their two-rowed isogenic lines. This suggests that row-type association with anther culture response in barley cultivars is due to the effect of a tight linkage with other genes directly responsible for androgenic response.
Publisher version (URL)http://dx.doi.org/10.1139/gen-44-5-936
URIhttp://hdl.handle.net/10261/99777
DOI10.1139/gen-44-5-936
Identifiersdoi: 10.1139/gen-44-5-936
issn: 0831-2796
Appears in Collections:(EEAD) Artículos
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