Plant science: Cytokinin oxidase regulates rice grain production

Motoyuki Ashikari; Hitoshi Sakakibara; Shaoyang Lin; Toshio Yamamoto; Tomonori Takashi; Asuka Nishimura; Enrique R. Angeles; Qian Qian; Hidemi Kitano; Makoto Matsuoka

doi:10.1126/science.1113373

Plant science: Cytokinin oxidase regulates rice grain production

Motoyuki Ashikari, Hitoshi Sakakibara, Shaoyang Lin, Toshio Yamamoto, Tomonori Takashi, Asuka Nishimura, Enrique R. Angeles, Qian Qian, Hidemi Kitano, Makoto Matsuoka

Research output: Contribution to journal › Article › peer-review

1368 Citations (Scopus)

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.

Original language	English
Pages (from-to)	741-745
Number of pages	5
Journal	Science
Volume	309
Issue number	5735
DOIs	https://doi.org/10.1126/science.1113373
Publication status	Published - Jul 29 2005
Externally published	Yes

ASJC Scopus subject areas

General

Access to Document

10.1126/science.1113373

Cite this

@article{8c78e2c8374948f78cdacac893d37f74,

title = "Plant science: Cytokinin oxidase regulates rice grain production",

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.",

author = "Motoyuki Ashikari and Hitoshi Sakakibara and Shaoyang Lin and Toshio Yamamoto and Tomonori Takashi and Asuka Nishimura and Angeles, {Enrique R.} and Qian Qian and Hidemi Kitano and Makoto Matsuoka",

year = "2005",

month = jul,

day = "29",

doi = "10.1126/science.1113373",

language = "English",

volume = "309",

pages = "741--745",

journal = "Science",

issn = "0036-8075",

publisher = "American Association for the Advancement of Science",

number = "5735",

}

TY - JOUR

T1 - Plant science

T2 - Cytokinin oxidase regulates rice grain production

AU - Ashikari, Motoyuki

AU - Sakakibara, Hitoshi

AU - Lin, Shaoyang

AU - Yamamoto, Toshio

AU - Takashi, Tomonori

AU - Nishimura, Asuka

AU - Angeles, Enrique R.

AU - Qian, Qian

AU - Kitano, Hidemi

AU - Matsuoka, Makoto

PY - 2005/7/29

Y1 - 2005/7/29

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=23044455690&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=23044455690&partnerID=8YFLogxK

U2 - 10.1126/science.1113373

DO - 10.1126/science.1113373

M3 - Article

C2 - 15976269

AN - SCOPUS:23044455690

SN - 0036-8075

VL - 309

SP - 741

EP - 745

JO - Science

JF - Science

IS - 5735

ER -

Plant science: Cytokinin oxidase regulates rice grain production

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this