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- Title
Identification of Leaf Blast Resistance Genes Derived from a Korean Weedy Rice, Ganghwaaengmi 11.
- Authors
Jung-Pil Suh; Young-Chan Cho; Jeong-Ju Kim; Young-Seop Shin; Chang-Ihn Yang; Jae-Hwan Roh; Yeon-Gyu Kim
- Abstract
A weedy rice, Ganghwaaengmi 11, shows high level of leaf blast resistance. The chromosomal number and locations of genes conferring the leaf blast resistance were detected by QTL (quantitative trait loci) analysis using SSR markers in the 120 RILs (recombinant inbred lines) derived from the cross between Nagdongbyeo and Ganghwaaengmi 11. Ganghwaaengmi 11 expressed compatibility with 20 of the 45 inoculated blast isolates, in contrast to Nagdongbyeo with 44 compatible isolates. To identify QTLs affecting partial resistance, RILs were assessed in upland blast nursery in three regions and inoculated with selected nine blast isolates. QTLs for resistance to blast isolates were identified on chromosomes 7, 11 and 12. Three QTLs associated with blast resistance in nursery test at three regions were also detected on chromosomes 7, 11 and 12. The QTL commonly detected on chromosome 12 was only increased blast resistance by Ganghwaaengmi 11 allele. This QTL accounted for 60.378.6% of the phenotypic variation in the blast nursery test. OSR32 and RM101 markers tightly linked to QTL for blast resistance on chromosome 12 might be useful for marker-assisted selection (MAS) and gene pyramiding to improve the blast resistance of japonica rice.
- Subjects
KOREA; RICE blast disease; GENETICS of disease resistance of plants; CHROMOSOMES; GENETIC markers
- Publication
Korean Journal of Breeding Science, 2010, Vol 42, Issue 4, p390
- ISSN
0250-3360
- Publication type
Article