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High‐resolution mapping revealed a 1.3‐Mbp genomic inversion in Ssi1 , a dominant semidwarf gene in rice ( Oryza sativa )
Author(s) -
Miura K.,
Wu J.,
Sunohara H.,
Wu X.,
Matsumoto T.,
Matsuoka M.,
Ashikari M.,
Kitano H.
Publication year - 2009
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/j.1439-0523.2008.01495.x
Subject(s) - biology , oryza sativa , locus (genetics) , genetics , gene mapping , gene , phenotype , mutant , quantitative trait locus , positional cloning , chromosomal inversion , oryza , chromosome , karyotype
Dwarf or semidwarf characters are an important trait for crop breeding as they provide lodging resistance. The rice mutant line DMF‐1 has a dm‐type semidwarf phenotype and high‐lodging resistance controlled by the dominant gene, Short second internode 1 ( Ssi1 ). To elucidate the mechanism of reducing culm length in DMF‐1, we sought to identify the Ssi1 gene by positional cloning using the chromosome segment substitution line as a crossing parent. As a result of high‐resolution mapping, we found a 1.3‐Mbp genomic inversion and a newly arranged gene in the Ssi1 locus. In this study, we report the high‐resolution mapping and physical mapping of Ssi1 . We also discuss the possible function of a novel rearranged Ssi1 gene for the dominant dm‐type semidwarf phenotype.