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Development of STS markers and QTL validation for common bacterial blight resistance in common bean
Author(s) -
Liu S.,
Yu K.,
Park S. J.
Publication year - 2008
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/j.1439-0523.2007.01423.x
Subject(s) - quantitative trait locus , biology , phaseolus , genetics , locus (genetics) , genetic marker , chromosome , marker assisted selection , genetic linkage , gene mapping , molecular marker , positional cloning , inbred strain , gene , botany
Common bacterial blight (CBB) of common bean ( Phaseolus vulgaris L.), is one of the major diseases that decrease yield and quality. A major quantitative trait locus (QTL) for CBB resistance from line XAN 159 was transferred into two bean lines, HR45 and HR67. Previous studies identified that two markers are linked to this QTL but the chromosome location was not consistent. To identify more tightly linked markers and to verify the chromosome location, 65 additional markers were mapped using 81 recombinant inbred lines (RILs) derived from a cross HR67 × OAC95‐4. The QTL was mapped to a 13 cM region on chromosome 1 and defined by eight molecular markers that explained 25–52% of the phenotypic variation. Six tightly linked amplified fragment length polymorphism markers (0.6–9.7 cM from the QTL peak) were converted into seven sequence tagged site markers, three of which were mapped to this QTL. Five tightly linked markers were used to screen 907 F 2 plants derived from a cross HR45 × ‘OAC Rex’ and four of them were linked to each other within 4.2 cM. These markers may be useful in marker‐assisted selection and map‐based cloning of this major QTL.