Mapping a QTL conferring resistance to Fusarium head blight on chromosome 1B in winter wheat (Triticum aestivumL.).
Fusarium head blight (FHB) is one of the most devastating diseases of wheat (Triticum aestivumL.), and the development of cultivars with FHB resistance is the most effective way to control the disease. Yumechikara is a Japanese hard red winter wheat cultivar that shows moderate resistance to FHB with superior bread-making quality. To identify quantitative trait loci (QTLs) for FHB resistance in Yumechikara, we evaluated doubled haploid lines derived from a cross between Yumechikara and a moderate susceptible cultivar, Kitahonami, for FHB resistance in a 5-year field trial, and we analyzed polymorphic molecular markers between the parents. Our analysis of these markers identified two FHB-resistance QTLs, one from Yumechikara and one from Kitahonami. The QTL from Yumechikara, which explained 36.4% of the phenotypic variation, was mapped on the distal region of chromosome 1BS, which is closely linked to the low-molecular-weight glutenin subunit geneGlu-B3and the glume color geneRg-B1. The other QTL (from Kitahonami) was mapped on chromosome 3BS, which explained 11.2% of the phenotypic variation. The close linkage between the FHB-resistance QTL on 1BS,Glu-B3andRg-B1brings an additional value of simultaneous screening for both quality and FHB resistance using the glume color.
Tokyo University of Agriculture, 1737, Funako, Atsugi, Kanagawa 243-0034, Japan; NARO Hokkaido Agricultural Research Center, Memuro Research Station, 9-4 Shinsei-minami, Memuro, Kasai, Hokkaido 082-0081, Japan.
Zenta
Z
Nishio
Obihiro University of Agriculture and Veterinary Medicine , Nishi 2-11, Inada, Obihiro, Hokkaido 080-8555 , Japan.
Chihiro
C
Onoe
NARO Hokkaido Agricultural Research Center, Memuro Research Station , 9-4 Shinsei-minami, Memuro, Kasai, Hokkaido 082-0081 , Japan.
Miwako
M
Ito
NARO Hokkaido Agricultural Research Center, Memuro Research Station , 9-4 Shinsei-minami, Memuro, Kasai, Hokkaido 082-0081 , Japan.
Tadashi
T
Tabiki
NARO Hokkaido Agricultural Research Center, Memuro Research Station , 9-4 Shinsei-minami, Memuro, Kasai, Hokkaido 082-0081 , Japan.
Koichi
K
Nagasawa
Obihiro University of Agriculture and Veterinary Medicine , Nishi 2-11, Inada, Obihiro, Hokkaido 080-8555 , Japan.
Hideho
H
Miura
Fusarium head blight; quantitative trait loci; resistance; wheat