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- W2387238978 abstract "Gui 99,an indica restorer line of hybrid rice(Oryza sativa L.),has been wildly applied to hybrid rice seed production in the south of China,but the genotype of date and gene interaction between photoperiod sensitivity loci and basic vegetative growth period in this restorer line are still unknown, which is definitely restricted to the further use of this restorer line in breeding practice and re-production of hybrid seeds.The objective of this study was to make the genetic analysis of Gui in photoperiod sensitivity loci and basic vegetative growth period using time nearly isogenic lines EG0-EG7,ER-LR,T65,T65m,T65E~b,T65E~bm.The parents,F_1 and F_2 generations from the crosses heading time nearly isogenic lines×Gui 99 grown under high temperature,natural long days and short days treated by sunshade in summer-season at Nanchang(28°36′ N),Jiangxi Province,and under low temperature,natural short days in dry-season at Sanya(18°14′ N),Hainan Province,where the average day-length is about 14 h/d,10 h/d and 11.6 h/d during the course of rice growing,respectively, were analyzed in genotype,temperature sensitivity and gene locus interaction. Experimental results showed that Gui carried photoperiod sensitivity alleles E_1,E_2 and E_3 in E_1,E_2 and E_3 loci,respectively,a photoperiod insensitive allele Se-1~e in Se-1 locus and an earliness allele Ef-1 in Ef-1 locus.The genotype of date in Gui was E_1E_1E_2E_2E_3E_3Se-1~eSe-1~eEf-1Ef-1.The weak photoperiod sensitivity in agronomic characters expressed in Gui was caused by the coexisting of late time genes E_1 and E_3,earliness gene Ef-1,and gene interaction between E_1,E_3 with Se-1~e.The photoperiod sensitive of late time alleles in E loci were enhanced by the photoperiod sensitivity allele Se-1~u(or Se-1~n).The mean days to was delayed and the frequency distribution of late plants of F_2 population derived from TLs×Gui 99 were increased by the effects of photoperiod sensitivity genes.The genetic foundation of high yield and widely adaptability of hybrid rice combination with this restorer line were also discussed." @default.
- W2387238978 created "2016-06-24" @default.
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- W2387238978 date "2006-01-01" @default.
- W2387238978 modified "2023-09-23" @default.
- W2387238978 title "Analysis of Heading Time Gene and Gene Loci Interactive Effect in Gui99,a Restorer Line of Hybrid Rice(Oryza sativa L.)" @default.
- W2387238978 hasPublicationYear "2006" @default.
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