RRC ID 3660
著者 Ashikari M, Sakakibara H, Lin S, Yamamoto T, Takashi T, Nishimura A, Angeles ER, Qian Q, Kitano H, Matsuoka M.
タイトル Cytokinin oxidase regulates rice grain production.
ジャーナル Science
Abstract Most agriculturally important traits are regulated by genes known as quantitative trait loci (QTLs) derived from natural allelic variations. We here show that a QTL that increases grain productivity in rice, Gn1a, is a gene for cytokinin oxidase/dehydrogenase (OsCKX2), an enzyme that degrades the phytohormone cytokinin. Reduced expression of OsCKX2 causes cytokinin accumulation in inflorescence meristems and increases the number of reproductive organs, resulting in enhanced grain yield. QTL pyramiding to combine loci for grain number and plant height in the same genetic background generated lines exhibiting both beneficial traits. These results provide a strategy for tailormade crop improvement.
巻・号 309(5735)
ページ 741-5
公開日 2005-7-29
DOI 10.1126/science.1113373
PII 1113373
PMID 15976269
MeSH Alleles Chromosome Mapping Cloning, Molecular Crops, Agricultural / genetics Crops, Agricultural / growth & development Crosses, Genetic Cytokinins / metabolism* Flowers / growth & development Flowers / metabolism Gene Expression Profiling Genes, Plant Meristem / metabolism Oryza / enzymology Oryza / genetics* Oryza / growth & development* Oxidoreductases / genetics* Oxidoreductases / metabolism* Phenotype Plants, Genetically Modified Quantitative Trait Loci* Sequence Analysis, DNA Sequence Deletion Zeatin / metabolism
IF 41.846
引用数 915
WOS 分野 PLANT SCIENCES
リソース情報
イネ Oryzabase