Evolution of resistance against powdery mildew in winter wheat populations conducted under dynamic management. II. Adult plant resistance

• Published in: Theoretical and applied genetics Vol. 101; no. 3; pp. 457 - 462
• Main Authors: PAILLARD, S, GOLDRINGER, I, ENJALBERT, J, TROTTET, M, DAVID, J, DE VALLAVIEILLE-POPE, C, BRABANT, P
• Format: Journal Article
• Language: English
• Published: Heidelberg Springer 01.08.2000; Berlin Springer Nature B.V; Springer Verlag
• Subjects: Agronomy. Soil science and plant productions; Biological and medical sciences; Fundamental and applied biological sciences. Psychology; Genes; Genetics; Genetics and breeding of economic plants; Life Sciences; Pest resistance; Plant pathogens; Plant resistance; Varietal selection. Specialized plant breeding, plant breeding aims; Wheat; France; Monocotyledones; Erysiphe graminis f. tritici; Plant pathogen; Genetic resource; Residual effect; Cereal crop; Fungus resistance; Fungi; Gene; Gramineae; Angiospermae; Ascomycetes; Spermatophyta; Developmental stage; Pure line; Comparative study; Triticum aestivum; Thallophyta; Quantitative analysis; RESISTANCE GENETIQUE; MILDIOU OIDIUM
• ISSN: 0040-5752; 1432-2242
• DOI: 10.1007/s001220051503

The evolution of adult plant resistance towards powdery mildew (caused by Blumeria graminis f. sp. tritici) was investigated in 11 wheat populations cultivated for 10 years in a French network for dynamic management (DM) of wheat genetic resources. The aims of the study were to compare the evolution of resistance in sites submitted to different powdery mildew pressure and to investigate the implication of specific resistance gene action in adult plant resistance. For this, 7 of the 11 populations were characterized for their composition of specific resistance genes (results presented in a former paper). Even though no population differed significantly from the initial PA0 pool for mean adult plant resistance, divergence appeared among the final populations. The populations with the highest adult plant resistance level originated from sites where powdery mildew pressure is known to be high (Vervins, Le Rheu), whereas populations with the lowest adult plant resistance corresponded to areas with no, or very low, powdery mildew pressure (Toulouse, Montreuil-Bellay). A residual effect of defeated specific resistance genes was hypothesized, as lines accumulating at least two specific resistance genes appeared more resistant. Additional quantitative resistance seemed to be involved in adult plant resistance. DM lines appeared then as an interesting source of variability for resistance towards powdery mildew. Moreover, as these lines had been grown in mixed populations they may be appropriate as components of a composite cultivar.[PUBLICATION ABSTRACT]