Loss of function of the IAA-glucose hydrolase gene TGW6 enhances rice grain weight and increases yield

Article

Ishimaru, Ken, Hirotsu, Naoki, Madoka, Yuka, Murakami, Naomi, Hara, Nao, Onodera, Haruko, Kashiwagi, Takayuki, Ujiie, Kazuhiro, Shimizu, Bun-ichi, Onishi, Atsuko, Miyagawa, Hisashi and Katoh, Etsuko. 2013. "Loss of function of the IAA-glucose hydrolase gene TGW6 enhances rice grain weight and increases yield." Nature Genetics. 45 (6), pp. 707-711. https://doi.org/10.1038/ng.2612
Article Title

Loss of function of the IAA-glucose hydrolase gene TGW6 enhances rice grain weight and increases yield

ERA Journal ID16629
Article CategoryArticle
AuthorsIshimaru, Ken (Author), Hirotsu, Naoki (Author), Madoka, Yuka (Author), Murakami, Naomi (Author), Hara, Nao (Author), Onodera, Haruko (Author), Kashiwagi, Takayuki (Author), Ujiie, Kazuhiro (Author), Shimizu, Bun-ichi (Author), Onishi, Atsuko (Author), Miyagawa, Hisashi (Author) and Katoh, Etsuko (Author)
Journal TitleNature Genetics
Journal Citation45 (6), pp. 707-711
Number of Pages5
Year2013
Place of PublicationUnited States
ISSN1061-4036
1546-1718
Digital Object Identifier (DOI)https://doi.org/10.1038/ng.2612
Web Address (URL)http://www.nature.com/ng/journal/v45/n6/full/ng.2612.html
Abstract

Increases in the yield of rice, a staple crop for more than half of the global population, are imperative to support rapid population growth. Grain weight is a major determining factor of yield. Here, we report the cloning and functional analysis of THOUSAND-GRAIN WEIGHT 6 (TGW6), a gene from the Indian landrace rice Kasalath. TGW6 encodes a novel protein with indole-3-acetic acid (IAA)-glucose hydrolase activity. In sink organs, the Nipponbare tgw6 allele affects the timing of the transition from the syncytial to the cellular phase by controlling IAA supply and limiting cell number and grain length. Most notably, loss of function of the Kasalath allele enhances grain weight through pleiotropic effects on source organs and leads to significant yield increases. Our findings suggest that TGW6 may be useful for further improvements in yield characteristics in most cultivars.

Keywordsplant breeding
ANZSRC Field of Research 2020310506. Gene mapping
310803. Plant cell and molecular biology
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Byline AffiliationsNational Institute of Agrobiological Sciences, Japan
Toyo University, Japan
Kyoto University, Japan
Institution of OriginUniversity of Southern Queensland
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