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자료유형
학술저널
저자정보
저널정보
한국육종학회 한국육종학회지 한국육종학회지 제36권 제1호
발행연도
2004.1
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1 - 8 (8page)

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This study was conducted to identify the genomic regions associated with cold tolerance in rice. An RIL population consisting of 120 lines was developed from a cross between the japonica cultivar, Hwayeongbyeo and the wild rice, Oryza rufipoon Griff. Acc.01944. The population was genotyped with 124 SSR markers, providing an average interval size of 15 cM, and evaluated for 6 traits related to cold tolerance in the cold-water irrigate plot (17oC). The RILs were also grown in the control plot to measure the effects of the cold water treatment on heading date and culm length. The RILs showed delayed heading and reduced culm length in the cold-water irrigated plot and the differences in heading date and culm length between two plots were statistically significant. A total of 19 QTLs associated with cold tolerance were identified using single point and interval analysis. The number of QTLs per trait ranged from one to five. Phenotypic variation associated with each QTL ranged from 5.5 to 44.8%. For five (26.3%) of the QTLs identified in this study, the O. rufipogon-derived allele contributed a desirable agronomic effect, and favorable wild alleles were detected for panicle exsertion, days to heading, and culm length associated with the cold water treatment. When compared with previous studies involving interspecific crosses, it can be concluded that O. rufipogon is useful as a source of valuable alleles for rice improvement and that many of the introgressed regions contain genes that have a favorable impact on phenotype in different genetic backgrounds.

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