Characterization and fine mapping of a shortened uppermost internode mutant in rice

Internode elongation is an important agronomic trait in rice that is associated with lodging, yield, flooding adaptation, and hybrid seed production. We identified a novel rice mutant line showing a shortened uppermost internode among the rice Ac/Ds insertional mutant population and named it shorten...

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Bibliographic Details
Published in:Plant biotechnology reports 2014, 8(2), , pp.125-134
Main Authors: Ji, Hyeonso, Kim, Hakbum, Yun, Doh-Won, Yoon, Ung-Han, Kim, Tae-Ho, Eun, Moo-Young, Lee, Gang-Seob
Format: Article
Language:English
Subjects:
Agricultural biotechnology
Agriculture
agronomic traits
Agronomy
Analysis
Biomedical and Life Sciences
Biosynthesis
Biotechnology
Cell Biology
chromosome mapping
Chromosomes
Genes
Genetic testing
Genomics
genotype
Genotypes
hybrids
incomplete dominance
Life Sciences
loci
Lodging
mutants
Mutation
Original Article
phenotype
Phenotypes
Plant Biochemistry
Plant Sciences
Population
Rice
Studies
농학
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Summary:Internode elongation is an important agronomic trait in rice that is associated with lodging, yield, flooding adaptation, and hybrid seed production. We identified a novel rice mutant line showing a shortened uppermost internode among the rice Ac/Ds insertional mutant population and named it shortened uppermost internode 4 (sui4). Interestingly, T1 plants of this line segregated into three phenotypes: extremely shortened uppermost internode-type, normal wild-type, and intermediate-type. The phenotypes of F1 plants and F2 plants from the cross of sui4 with its original variety, Dongjin, indicated that the SUI4 gene shows incomplete dominance or semidominance. Because the Ds genotypes did not co-segregate with the sui4 phenotypes, we performed mapping of this gene with 273 F2 plants from a cross between sui4 and Milyang23. Primary mapping revealed that the SUI4 locus was located between the S07012 and S07015 markers on rice chromosome 7. Further fine mapping with 36 F3 lines derived from F2 plants that have recombination in this region narrowed down the location of SUI4 to the 1.1-Mbp interval of RM1253–S07015.
ISSN:1863-5466
1863-5474
DOI:10.1007/s11816-013-0280-5