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Variation of resistance to Pseudocercosporella herpotrichoides (Fron) Deighton in wheat genotypes carrying the gene Pch-1



Variation of resistance to Pseudocercosporella herpotrichoides (Fron) Deighton in wheat genotypes carrying the gene Pch-1



Plant Breeding 118(4): 281-287



The effect of the gene Pch-1 on the resistance wheat to Pseudocercosporella herpotrichoides was studied at four growth stages. The germplasm used consisted of adapted cultivars, genotypes provided by European plant breeders, near-homozygous lines and double haploid lines developed from our own breeding projects. The resistance was measured by ELISA. At all growth stages, genotypes carrying Pch-1 differed significantly in resistance. At early growth stages, there was a strong effect of the gene in most genotypes, but later the effect decreased and significant genotype-environment interactions appeared. In addition, minor genes became more important and determined the level of adult plant resistance that proved to be inherited quantitatively, Pch-1 was of minor importance for this type of resistance. It is concluded that a high and long-lasting resistance level could be attained if the two genetically different sources of resistance were combined (resistance at juvenile stages, induced by Pch-1, and quantitative resistance at adult stages).

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Accession: 003331130

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DOI: 10.1046/j.1439-0523.1999.00388.x


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