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
오류제보하기
Grain size has a great impact on rice grain yield and is controlled by quantitative trait loci (QTL). Daeribbyeo 1 with big grain is widely used for genetic materials to develop varieties with diverse grain size. This study was conducted to identify genes controlling grain size traits of Daeribbyeo 1. An F2:3 population derived from a cross between two japonica cultivars, Boseogheugchal and Daeribbyeo1, was used to identify QTL controlling grain shape traits. A total of 284 F2 plants were measured for grain shape traits, grain length (GL), grain width (GW), grain thickness (GT), 1,000 grain weight (TGW), and two morphological traits, pericarp color and waxy endosperm. Sixty F3 lines were selected based on the grain shape traits and marker genotypes and evaluated for grain shape traits. For marker analysis, SSR markers tightly linked to five known grain size genes and two QTLs were selected and used for genotyping. A total of 11 QTLs detected on chromosomes 2, 3, 4 and 6 explained phenotypic variation from 3.9% to 59.3%. qTGW2, qGW2 and qGT2 were detected in the same region between RM12811-RM12837 that are tightly linked with GW2 gene. qTGW3 and qGL3 were detected near GS3 gene. To know whether Daeribbyeo 1 has the same mutations in GW2 and GS3 as the various grain-size genotypes, GW2 and GS3 of two parents were sequenced. Daeribbyeo 1 had the same one base (A) deletion at a position 316 as ‘WY3’ in GW2 which results in the loss of function of GW2 gene. Boseogheugchal showed a C-to-A nonsense mutation in the second exon of GS3 gene that increased grain length. Interaction between GW2 and GS3 was not significant indicating that two genes controlled grain-size traits in additive pathway. The results from this study indicate that three QTLs GW2, qGT4 and qGL6 are associated with the grain size variation in Daeribbyeo 1 with GW2 as the major QTL.
목차
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참고문헌 (27)
참고문헌 신청
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 112:1164~1171
Fan C / 2009 / A causal C–A mutation in the second exon of GS3 highly associated with rice grain length and validated as a functional marker / Theoretical and Applied Genetics 118:465~472
Furukawa T / 2006 / The Rc and Rd genes are involved in proanthocyanidin synthesis in rice pericarp / The Plant Journal 49:91~102
Ishimaru K / 2013 / Loss of function of the IAA-glucose hydrolase gene TGW6 enhances rice grain weight and increases yield / Nat. Genet 45:707~711
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 112:1164~1171
Fan C / 2009 / A causal C–A mutation in the second exon of GS3 highly associated with rice grain length and validated as a functional marker / Theoretical and Applied Genetics 118:465~472
Furukawa T / 2006 / The Rc and Rd genes are involved in proanthocyanidin synthesis in rice pericarp / The Plant Journal 49:91~102
Ishimaru K / 2013 / Loss of function of the IAA-glucose hydrolase gene TGW6 enhances rice grain weight and increases yield / Nat. Genet 45:707~711
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