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Quantitative trait loci mapping of adult‐plant resistance to powdery mildew in triticale
Author(s) -
Karbarz Małgorzata,
Tyrka Mirosław,
WoźniakStrzembicka Anna,
Czajowski Grzegorz,
Wardyńska Agnieszka,
Tyrka Dorota,
Pojmaj Mirosław,
Wędzony Maria
Publication year - 2020
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/aab.12613
Subject(s) - powdery mildew , biology , quantitative trait locus , blumeria graminis , genetics , triticale , population , microsatellite , plant disease resistance , chromosome , gene , botany , allele , demography , sociology
Powdery mildew (PM) is a common disease caused by Blumeria graminis , which affects cereals and has recently adapted to triticale. Adult‐plant resistance (APR) genes provide durable protection of crops from the disease. Quantitative trait loci corresponding to the APR effects were mapped in an F 2 population of “Lamberto” (susceptible) × “Moderto” (resistant). A genetic map of winter triticale was constructed based on the segregation of 863 DArT, 38 microsatellite and 10 resistance gene analogue markers. Composite interval mapping (CIM) was applied to identify three QTLs for maximum disease severity (MDS) and two for the area under disease progress curve (AUDPC) conferring resistance to the powdery mildew on chromosomes: 6A, 7A, 1B and 4R. The 39% variation in AUDPC was explained by the main QTL localised on chromosome 4R. Genes coding TRIUR3 proteins, serine/threonine protein kinase and cell wall associated kinases were localised in silico within the QTL and alternative DNA markers were proposed for flexible use in laboratories of diversified throughput.