지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
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In a previous study, we mapped 12 QTLs for 1,000 grain weight (TGW) in the 172 BC2F2 lines derived from a cross between Oryza sativa ssp. Japonica cv. Hwaseongbyeo and O. rufipogon. These QTLs explained 5.4 – 11.4% of the phenotypic variance for TGW. Marker-aided selection combined with backcrosses was employed to develop QTL-NILs for each QTL. BC2F2lines with each target QTL were backcrossed to Hwaseongbyeo twice and then allowed to self to produce BC4F5 populations.
SSR markers linked to TGW were employed to select QTL-NILs with the respective target QTL. Six QTL-NILs with the recurrent parent, Hwaseongbyeo were evaluated for nine traits for three years from 2007 and 2009. Differences were observed between each of the 6 QTL-NILs and Hwaseongbyeo in TGW. In addition to TGW, these QTL-NILs displayed differences in other agronomic traits possibly indicating a tight linkage of genes controlling these traits. The direction of the QTL for TGW in 6 QTL-NILs was consistent as in the BC2F2 lines from the same cross. Difference in TGW between each of the QTL-NILs and Hwaseongbyeo was associated with the difference in one or two grain shape traits; grain length, grain width, and grain thickness. SSR markers linked to the QTL for TGW will facilitate selection of the grain shape character in a breeding program to diversify grain shape and provide the foundation for map-based gene isolation. Also, the QTL-NILs developed in this report and the progenies from crosses between the QTL-NILs will be useful in clarifying epistatic interactions among QTLs for TGW.
목차
등록된 정보가 없습니다.
참고문헌 (22)
참고문헌 신청
Causse MA / 1994 / Saturated molecular map of the rice genome based on an interspecific backcross population / Genetics 138 : 1251 ~ 1274
Cho YC / 2003 / QTLs analysis of yield and its related traits in wild rice relative Oryza rufipogon / Treat. Crop Res. 4 : 19 ~ 29
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
Hirota O / 1990 / Sink activity estimation by sink size and dry matter increase during the ripening stage of barley (Hordeum vulgare) and rice (Oryza sativa) / Ann. Bot. 65 :
Kinoshita T / 1998 / Report of the committee on gene symbolization, nomenclature and linkage groups. II. Linkage mapping using mutant genes in rice / Rice Genet. Newsl. 15 :
Cho YC / 2003 / QTLs analysis of yield and its related traits in wild rice relative Oryza rufipogon / Treat. Crop Res. 4 : 19 ~ 29
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
Hirota O / 1990 / Sink activity estimation by sink size and dry matter increase during the ripening stage of barley (Hordeum vulgare) and rice (Oryza sativa) / Ann. Bot. 65 :
Kinoshita T / 1998 / Report of the committee on gene symbolization, nomenclature and linkage groups. II. Linkage mapping using mutant genes in rice / Rice Genet. Newsl. 15 :
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