TY - JOUR
T1 - Quantitative trait loci associated with resistance to Fusarium head blight and kernel discoloration in barley
AU - De La Pena, R. C.
AU - Smith, K. P.
AU - Capettini, F.
AU - Muehlbauer, G. J.
AU - Gallo-Meagher, M.
AU - Dill-Macky, R.
AU - Somers, D. A.
AU - Rasmusson, D. C.
PY - 1999
Y1 - 1999
N2 - Resistance to Fusarium head blight (FHB), deoxynivalenol (DON) accumulation, and-kernel discoloration (KD) in barley are difficult traits to introgress into elite varieties because current screening methods are laborious and disease levels are strongly influenced by environment. To improve breeding strategies directed toward enhancing these traits, we identified genomic regions containing quantitative trait loci (QTLs) associated with resistance to FHB, DON accumulation, and KD in a breeding population of F(4:7) lines using restriction fragment length polymorphic (RFLP) markers. We evaluated 101 F(4:7) lines, derived from a cross between the cultivar Chevron and an elite breeding line, M69, for each of the traits in three or four environments. We used 94 previously mapped RFLP markers to create a linkage map. Using composite interval mapping, we identified 10, 11, and 4 QTLs associated with resistance to FHB, DON accumulation, and KD, respectively. Markers flanking these QTLs should be useful for introgressing resistance to FHB, DON accumulation, and KD into elite barley cultivars.
AB - Resistance to Fusarium head blight (FHB), deoxynivalenol (DON) accumulation, and-kernel discoloration (KD) in barley are difficult traits to introgress into elite varieties because current screening methods are laborious and disease levels are strongly influenced by environment. To improve breeding strategies directed toward enhancing these traits, we identified genomic regions containing quantitative trait loci (QTLs) associated with resistance to FHB, DON accumulation, and KD in a breeding population of F(4:7) lines using restriction fragment length polymorphic (RFLP) markers. We evaluated 101 F(4:7) lines, derived from a cross between the cultivar Chevron and an elite breeding line, M69, for each of the traits in three or four environments. We used 94 previously mapped RFLP markers to create a linkage map. Using composite interval mapping, we identified 10, 11, and 4 QTLs associated with resistance to FHB, DON accumulation, and KD, respectively. Markers flanking these QTLs should be useful for introgressing resistance to FHB, DON accumulation, and KD into elite barley cultivars.
KW - Barley
KW - Black point
KW - Deoxynivalenol (DON)
KW - Fusarium head blight
KW - Kernel blight
KW - Kernel discoloration
KW - RFLP
KW - Scab
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U2 - 10.1007/s001220051269
DO - 10.1007/s001220051269
M3 - Article
C2 - 22665190
AN - SCOPUS:0032863653
SN - 0040-5752
VL - 99
SP - 561
EP - 569
JO - Theoretical And Applied Genetics
JF - Theoretical And Applied Genetics
IS - 3-4
ER -