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- Title
High-resolution mapping revealed a 1.3-Mbp genomic inversion in Ssi1, a dominant semidwarf gene in rice ( Oryza sativa).
- Authors
Miura, K.; Wu, J.; Sunohara, H.; Wu, X.; Matsumoto, T.; Matsuoka, M.; Ashikari, M.; Kitano, H.
- Abstract
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.
- Subjects
GENETIC engineering; GENOTYPE-environment interaction; GENETICS; CELL nuclei; CLONING; RICE
- Publication
Plant Breeding, 2009, Vol 128, Issue 1, p63
- ISSN
0179-9541
- Publication type
Article
- DOI
10.1111/j.1439-0523.2008.01495.x