Identification of stably expressed quantitative trait loci for grain yield and protein content using recombinant inbred line and reciprocal introgression line populations in rice

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dc.creatorCheng, Lirui
dc.creatorXu, Qin
dc.creatorZheng, Tianqing
dc.creatorYe, Guoyou
dc.creatorLuo, Chenggang
dc.creatorXu, Jianlong
dc.creatorLi, Zhikang
dc.date2013-07
dc.date2024-12-19T12:55:16Z
dc.date2024-12-19T12:55:16Z
dc.date.accessioned2026-06-27T04:14:38Z
dc.descriptionImprovements of rice (Oryza sativa L.) grain yield and protein content are important breeding objectives. Two hundred forty recombinant inbred lines (RILs) derived from a cross between japonica cultivar Xiushui09 and indica breeding line IR2061‐520‐6‐9 were used to identify quantitative trait loci (QTLs) affecting grain yield per plant (GYP) and protein content (PC) in rice. A total of five main‐effect QTLs (M‐QTLs) were identified on chromosomes 2, 4, 7, 10, and 12, which collectively explained 50.06% of the total phenotypic variance. As for PC, a total of four M‐QTLs were identified on chromosomes 2, 5, 10, and 11, which explained 41.44% of the total phenotypic variance. A total six pairs of epistatic QTLs (E‐QTLs) were identified. Furthermore, the M‐QTLs for GYP and PC detected in the RIL population were confirmed by two sets of BC2F6 reciprocal introgression lines (ILs) derived from the same parents and tested in Sanya and Hangzhou. The results indicated that four M‐QTLs (qGYP‐7 and qGYP‐12 for GYP and qPC‐10 and qPC‐11 for PC) showed stable expressions and consistent pyramiding effects across different environments under different genetic backgrounds. The ILs with pyramided nonallelic alleles at M‐QTLs for GYP from Xiushui09 in IR2061‐520‐6‐9 genetic background or the alleles of M‐QTLs for PC from IR2061‐520‐6‐9 in Xiushui09 genetic background provided some useful information on marker‐assisted selection (MAS) for developing either higher GYP or higher PC cultivars. Two lines, XS‐198 and IR146, with favorable alleles at four M‐QTLs from the two parents showed high GYP and PC and thus could be directly used in production.
dc.identifierhttps://hdl.handle.net/10568/165628
dc.identifier.urihttp://hdl.handle.net/123456789/26325
dc.languageen
dc.publisherWiley
dc.sourceCheng, Lirui; Xu, Qin; Zheng, Tianqing; Ye, Guoyou; Luo, Chenggang; Xu, Jianlong and Li, Zhikang. 2013. Identification of stably expressed quantitative trait loci for grain yield and protein content using recombinant inbred line and reciprocal introgression line populations in rice. Crop Science, Volume 53 no. 4 p. 1437-1446
dc.subjectalleles
dc.subjectchromosomes
dc.subjectgene interaction
dc.subjectgenetic markers
dc.subjectgrain yield
dc.subjectinbred lines
dc.subjectintrogression
dc.subjectlines
dc.subjectphenotypes
dc.subjectplant breeding
dc.subjectplant protein
dc.subjectprotein content
dc.subjectquantitative trait loci
dc.subjectrecombination
dc.subjectselection
dc.subjectvarieties
dc.titleIdentification of stably expressed quantitative trait loci for grain yield and protein content using recombinant inbred line and reciprocal introgression line populations in rice
dc.typeJournal Article

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Instituto Internacional de Investigación del Arroz (IRRI)