Inheritance of adult field resistance to yellow rust disease among broad-based hexaploid spring wheat germplasm

• Published in: Theoretical and applied genetics Vol. 97; no. 3; pp. 502 - 506
• Main Authors: Wagoire, W.W, Stolen, O, Hill, J, Ortiz, R
• Format: Journal Article
• Language: English
• Published: Heidelberg Springer 01.08.1998; Berlin Springer Nature B.V
• Subjects: additive effect; Biological and medical sciences; Classical genetics, quantitative genetics, hybrids; Crop diseases; crossing; cultivars; diallel analysis; Disease; disease resistance; dominance effects; epistasis; Fundamental and applied biological sciences. Psychology; Genetic aspects; genetic effects; genetic techniques and protocols; Genetics; Genetics of eukaryotes. Biological and molecular evolution; germplasm; Heritability; Hybridization; inheritance (genetics); lines; Plant genetics; Plant immunology; Pteridophyta, spermatophyta; Puccinia striiformis; rust diseases; Triticum aestivum; Vegetals; Wheat; Uganda; Denmark; Puccinia striiformis; Monocotyledones; Genetic variability; Plant pathogen; Genetic resource; Basidiomycetes; Diallel analysis; Epistasis; Cereal crop; Fungus resistance; Fungi; Germplasm; Gene; Gramineae; Angiospermae; Genetic improvement; Spermatophyta; Inheritance(genetics); Triticum aestivum; Thallophyta
• ISSN: 0040-5752; 1432-2242
• DOI: 10.1007/s001220050923

Complete F1 and F2 diallel crosses were used to investigate the inheritance of yellow rust resistance among eight bread wheat lines, developed by CIMMYT for the East African Highlands, which showed a wide response to this disease. Both diallel sets were grown at a site with a high incidence of yellow rust, although for one season, during which the F1 diallel was grown, disease incidence was unusually low. Analyses disclosed the presence of additive, dominance and epistatic effects among those genes controlling rust resistance, with the former being the most important. At normal disease levels, excluding two arrays having resistant common parents removed non-allelic interactions from the F1 diallels. For all F2 diallels, and the remaining F1 diallel, omitting two arrays based on susceptible parents removed these interactions. Local selection of material from a broadly based germplasm appears to be a feasible method of developing adapted cultivars resistant to endemic diseases.