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Identification and multi-environment validation of resistance to Ascochyta fabae in faba bean (Vicia faba)

AuthorsRubiales, Diego ; Ávila, Carmen M.; Sillero, Josefina C.; Hybl, M.; Narits, L.; Sass, Olaf; Flores, Fernando
KeywordsAscochyta blight
Disease resistance
Faba bean
Genotype × environment interaction
Issue Date14-Feb-2012
CitationField Crops Research 126: 165-170 (2012)
AbstractAscochyta blight incited by Ascochyta fabae is a widespread disease severely damaging faba bean (Vicia faba) production. Insufficient resistance is available in faba bean cultivars. In an attempt to identify new sources of resistance a germplasm collection of 484 V. faba accessions was screened for resistance to A. fabae under field conditions; stability of resistance of the 19 most resistant accessions was tested in a multi-location experiment in Czech Republic, Estonia, Germany and Spain over two field seasons. Although complete resistance was not found, six accessions showed interesting levels of incomplete resistance. Genotype. ×. environment (G. ×. E) interaction accounted for 42% of the sum of squares of the multi-environment evaluation, revealing instability of the phenotypic expression across environments. Accessions L-831818, V-26 and V-958 stand out for their consistent resistance, being the most resistant and stable across environments. Accessions V-255, V-1020, V-1085 and V-1117 displayed good resistance, but lower stability, with V-1020, V-1085 and V-1117 being more suitable for Córdoba (Mediterranean mega-environment), and V-255 more suitable for Hohenlieth, Jõgeva and Sumperk (Continental mega-environment). © 2011 Elsevier B.V.
Identifiersdoi: 10.1016/j.fcr.2011.10.012
issn: 0378-4290
Appears in Collections:(IAS) Artículos
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