کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4510577 | 1624737 | 2012 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Identification and multi-environment validation of resistance to Ascochyta fabae in faba bean (Vicia faba) Identification and multi-environment validation of resistance to Ascochyta fabae in faba bean (Vicia faba)](/preview/png/4510577.png)
Ascochyta 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).
► Additional sources of resistance against Ascochyta fabae have been identified under field conditions in a germplasm collection of Vicia faba accessions.
► 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.
Journal: Field Crops Research - Volume 126, 14 February 2012, Pages 165–170