Identification of a new QTL for Fusarium head blight resistance in the wheat genotype "Wang shui-bai".
Fusarium head blight (FHB) is one of the most devastating wheat diseases, causing both yield loss and quality reduction. To detect quantitative trait loci (QTL) responsible for FHB resistance, plants of the F 2:3 population derived from a 'Wangshui-bai' x 'Sy95-7' cross were artificially inoculated. Of 396 simple sequence repeats (SSRs), 125 amplified fragment length polymorphisms were used for FHB resistance QTL analysis. Five QTLs for FHB resistance were detected on chromosomes 3B, 6B, 7A, 1B and 2D. The effect of the QTL located on chromosome 3B on phenotypic variation was 31.69%, while that of the QTL found on 2D was the smallest and only accounted for 4.98% of the variation. The resistance alleles originated from 'Wangshibai' and association of the QTLs using these SSR markers may facilitate marker-assisted selection to improve FHB resistance in the wheat breeding programs of southwest China.
Zhang
Min
M
Department of Plant Pathology, Sichuan Agricultural University,Ya'an, Sichuan 625014, China.
Zhang
Rong
R
Yang
Jizhi
J
Luo
Peigao
P
D002874:Chromosome Mapping; D032461:Chromosomes, Plant; D003001:Cloning, Molecular; D005670:Fusarium / Q000276:immunology*; D005838:Genotype; D007113:Immunity, Innate / Q000235:genetics*; D018895:Microsatellite Repeats / Q000235:genetics; D009181:Mycoses / Q000235:genetics / Q000276:immunology; D010641:Phenotype; D010935:Plant Diseases / Q000235:genetics / Q000276:immunology; D040641:Quantitative Trait Loci / Q000235:genetics*; D014908:Triticum / Q000235:genetics* / Q000276:immunology