Journal ArticleDOI
Loss of function of the IAA-glucose hydrolase gene TGW6 enhances rice grain weight and increases yield
Ken Ishimaru,Naoki Hirotsu,Yuka Madoka,Naomi Murakami,Nao Hara,Haruko Onodera,Takayuki Kashiwagi,Kazuhiro Ujiie,Bun-ichi Shimizu,Atsuko Onishi,Hisashi Miyagawa,Etsuko Katoh +11 more
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TLDR
The cloning and functional analysis of THOUSAND-GRAIN WEIGHT 6 (TGW6), a gene from the Indian landrace rice Kasalath, suggest that TGW6 may be useful for further improvements in yield characteristics in most cultivars.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.read more
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Genetic and epistatic effects for grain quality and yield of three grain-size QTLs identified in brewing rice ( Oryza sativa L.).
TL;DR: It is reported that three grain-size quantitative trait loci (QTLs), derived from the brewing cultivar, Yamadanishiki, affect grain shape, chalky grain rate, and yield, using near isogenic and pyramiding lines in the genetic background of the cooking cultivar Koshihikari.
Journal ArticleDOI
Why high yield QTLs failed in preventing yield stagnation in rice?
TL;DR: In this paper , the authors highlighted that almost all the high-yielding quantitative trait loci introduced lines had no practical usage in current high yield breeding programs, mainly due to their low absolute grain yield.
Patent
Molecular marker for identifying wild type and mutant of 1000-grain weight gene TGW6 of rice
TL;DR: In this article, a molecular marker for identifying wild type and mutant of 1000-grain weight gene TGW6 of rice was proposed, which can be widely applied to rice genetic resource identification or auxiliary selective breeding of seeds.
Journal ArticleDOI
The chromosome regions for increasing early growth in rice: role of sucrose biosynthesis and NH4 + uptake
Yuki Nagai,Kouichi Matsumoto,Yuri Kakinuma,Kazuhiro Ujiie,Ken Ishimaru,Dananjali Gamage,Michael Thompson,Paul J. Milham,Saman Seneweera,Naoki Hirotsu,Naoki Hirotsu +10 more
TL;DR: The results suggest that early growth of rice is controlled by multiple traits and sucrose biosynthesis and NH4+ uptake play key roles.
Journal ArticleDOI
Transcriptomic analysis reveals the contribution of auxin on the differentially developed caryopses on primary and secondary branches in rice.
Shenghua Jia,Shu Chang,Hanmeng Wang,Zhilin Chu,Chao Xi,Jin Liu,Heping Zhao,Shengcheng Han,Yingdian Wang +8 more
TL;DR: The application of exogenous IAA in CSB before fertilization promoted gene expression, caryopsis development and grain weight closer to that in CPB, providing a molecular framework to optimize CSB development and potential targets for increasing grain yield.
References
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Validation of the general purpose Tripos 5.2 force field
TL;DR: In this paper, a molecular mechanics force field implemented in the Sybyl program is described along with a statistical evaluation of its efficiency on a variety of compounds by analysis of internal coordinates and thermodynamic barriers.
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Seed Banks and Molecular Maps: Unlocking Genetic Potential from the Wild
TL;DR: The tools of genome research may finally unleash the genetic potential of the authors' wild and cultivated germplasm resources for the benefit of society.