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Relationship between leaf stages and epistasis for resistance to Stagonospora nodorum in durum wheat Genet. Mol. Biol.
Bnejdi,Fethi; Saadoun,Mourad; Naouari,Mouna; El Gazzah,Mohamed.
Ten varieties and eight generations (2F1, 2F2, 2B1 and 2B2) of durum wheat derived from two crosses were evaluated for resistance to natural infection by Stagonospora nodorum blotch (SNB) at the 2-3 and 6-7 leaf stages at two sites over two years. There were significant differences in the incidence of SNB between leaf stages in most of the wheat varieties, with resistance being most evident at the 6-7 leaf stage. Separate analyses of the mean values for each generation showed that the genetic mechanism of defense against the pathogen depended upon the leaf stage. At the 2-3 leaf stage, only additive and dominance effects were implicated in the control of SNB for the two crosses at the two sites and for the two replications. For the 6-7 leaf stage,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Adaptability; Inheritance; Leaf stage; Stagonospora nodorum blotch.
Ano: 2012 URL:
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