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Genomewide association study reveals novel quantitative trait loci associated with resistance towards Septoria tritici blotch in North European winter wheat
Author(s) -
Vagndorf Nana,
Nielsen Nanna Hellum,
Edriss Vahid,
Andersen Jeppe Reitan,
Orabi Jihad,
Jørgensen Lise Nistrup,
Jahoor Ahmed
Publication year - 2017
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/pbr.12490
Subject(s) - biology , quantitative trait locus , septoria , single nucleotide polymorphism , association mapping , population , genetics , genome wide association study , genetic association , agronomy , genotype , gene , demography , sociology
Fungal diseases are a major constraint for wheat production. Effective disease resistance is essential for ensuring a high production quality and yield. One of the most severe fungal diseases of wheat is Septoria tritici blotch ( STB ), which influences wheat production across the world. In this study, genomewide association mapping was used to identify new chromosomal regions on the wheat genome conferring effective resistance towards STB . A winter wheat population of 164 North European varieties and breeding lines was genotyped with 15K single nucleotide polymorphism ( SNP ) wheat array. The varieties were evaluated for STB in field trials at three locations in Denmark and across 3 years. The association analysis revealed four quantitative trait loci, on chromosomes 1B, 2A, 5D and 7A, highly associated with STB resistance. By comparing varieties containing several quantitative trait loci ( QTL ) with varieties containing none of the found QTL , a significant difference was found in the mean disease score. This indicates that an effective resistance can be obtained by pyramiding several QTL .