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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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In previous studies, we reported QTLs for grain weight (GW), qGW3 and for spikelets per panicle (SPP), qSPP3 linked to RM60 on chromosome 3 using advanced backcross lines derived from a cross between Oryza sativa ssp. Indica cv. Milyang 23 and O. glaberrima. The O. glaberrima alleles at this locus increased GW and spikelets per panicle in the Milyang 23 background.
To further confirm and narrow down the position of the QTLs on chromosome 3, substitution mapping was performed using five lines containing the target O. glaberrima segment on chromosome 3. The size and position of the O. glaberrima segment on chromosome 3 were different in each line. These lines possessed 3-10 non-target O. glaberrima introgressions in the Milyang 23 background. These five lines were evaluated for seven agronomic traits including 1,000 grain weight and spikelets per panicle and also genotyped with seven SSR markers. Four lines were informative in delimiting the position of QTLs, qGW3 and qSPP3.
Two lines with the O. glaberrima segment flanked by SSR markers, RM60 and RM523 displayed significantly higher values than Milyang 23 in GW and SPP whereas two lines without that O. glaberrima segment displayed no difference in GW and SPP compared to Milyang 23. The result indicates that two QTL, qGW3 and qSPP3 are located in the interval between RM60and RM523 which are 1.2-Mb apart. Introgression lines having QTLs, qGW3 and qSPP3 would be useful materials not only to indentify the relationship between these two yield QTLs, but also to develop high yielding variety via marker-aided selection technology.
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참고문헌 (24)
참고문헌 신청
Ashikari M / 2005 / Cytokinin oxidase regulates rice grain production / Science 309 : 741 ~ 745
Barry MB / 2007 / Genetic diversity of the two cultivated rice species (O. sativa and O. glaberrima) in Maritime Guinea. Evidence for interspecifc recombination / Euphytica 1
Causse MA / 1994 / Saturated molecular map of the rice genome based on an interspecific backcross population / Genetics 138 : 1251 ~ 1274
Fan C / 2006 / GS3, a major QTL for grain length and weight and minor QTL for grain width and thickness in rice, encodes a putative transmembrane protein / Theor. Appl. Genet
Foyer CH / 1987 / The basis for source-sink interaction in leaves / Plant Physiol. Biochem 25 : 649 ~ 657
Barry MB / 2007 / Genetic diversity of the two cultivated rice species (O. sativa and O. glaberrima) in Maritime Guinea. Evidence for interspecifc recombination / Euphytica 1
Causse MA / 1994 / Saturated molecular map of the rice genome based on an interspecific backcross population / Genetics 138 : 1251 ~ 1274
Fan C / 2006 / GS3, a major QTL for grain length and weight and minor QTL for grain width and thickness in rice, encodes a putative transmembrane protein / Theor. Appl. Genet
Foyer CH / 1987 / The basis for source-sink interaction in leaves / Plant Physiol. Biochem 25 : 649 ~ 657
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