Mapping and characterization of quantitative trait loci for mesocotyl elongation in rice (Oryza sativa L.)

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dc.creatorLee, Hyun-Sook
dc.creatorSasaki, Kazuhiro
dc.creatorHigashitani, Atsushi
dc.creatorAhn, Sang-Nag
dc.creatorSato, Tadashi
dc.date2012-12
dc.date2024-12-19T12:55:26Z
dc.date2024-12-19T12:55:26Z
dc.date.accessioned2026-06-27T04:11:13Z
dc.descriptionMesocotyl elongation is an important trait for seedling emergence in direct-seeding cultivation in rice. In this study, a backcross inbred line (BIL) population from a cross between Kasalath and Nipponbare was employed to map quantitative trait loci (QTLs) for mesocotyl elongation. A total of 5 QTLs for mesocotyl length were identified on chromosomes 1, 3, 7, 9, and 12 in 2 independent experiments. At all QTL, the Kasalath alleles contributed to an increase in mesocotyl length. Two QTLs (qMel-1 and qMel-3) on chromosomes 1 and 3 were consistently detected in both experiments. To fine map the QTLs, a cross was made between 2 chromosome segment substitution lines (CSSL-6 and CSSL-15), each harboring the Kasalath allele across the qMel-1 and qMel-3 regions, and an F-2:3 population was developed. A two-way ANOVA indicated that no epistatic interaction was detected between the 2 QTLs in the F-2 population (P = 0.31). Moreover, analysis of two F-3 near-isogenic lines (NILs) derived from the same cross, indicated that the 2 QTLs act additively in distinct or complementary pathways in controlling mesocotyl elongation. Substitution mapping indicated that the qMel-1 QTL was located between the 2 SSR markers RM5448 and RM5310, which are 3,799-kb apart, and that the qMel-3 QTL was located between the 2 SSR markers RM3513 and RM1238, which are 6,964-kb apart. To our knowledge, this is the first report to fine-map QTLs for mesocotyl elongation and to analyze their interaction
dc.identifierhttps://hdl.handle.net/10568/165762
dc.identifier.urihttp://hdl.handle.net/123456789/24390
dc.languageen
dc.publisherSpringer
dc.rightsOpen Access
dc.sourceLee, Hyun-Sook; Sasaki, Kazuhiro; Higashitani, Atsushi; Ahn, Sang-Nag and Sato, Tadashi. 2012. Mapping and characterization of quantitative trait loci for mesocotyl elongation in rice (Oryza sativa L.). Rice, Volume 5, no. 1
dc.subjectalleles
dc.subjectchromosome mapping
dc.subjectchromosomes
dc.subjectgenetic maps
dc.subjectgenetic markers
dc.subjectmesocotyls
dc.subjectquantitative trait loci
dc.subjectsimple sequence repeats
dc.titleMapping and characterization of quantitative trait loci for mesocotyl elongation in rice (Oryza sativa L.)
dc.typeJournal Article

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Instituto Internacional de Investigación del Arroz (IRRI)