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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Copy number variation at the GL7 locus contributes to grain size diversity in rice
Yuexing Wang,Yuexing Wang,Guosheng Xiong,Jiang Hu,Liang Jiang,Hong Yu,Jie Xu,Yunxia Fang,Longjun Zeng,Erbo Xu,Jing Xu,Weijun Ye,Xiangbing Meng,Ruifang Liu,Hongqi Chen,Yanhui Jing,Yonghong Wang,Xudong Zhu,Jiayang Li,Qian Qian +19 more
TL;DR: Li and Xudong Zhu as mentioned in this paper reported cloning of the Grain Length on Chromosome 7 (GL7) locus in rice and identified a copy number variant that increases grain length and improves grain quality.
Journal ArticleDOI
A Rare Allele of GS2 Enhances Grain Size and Grain Yield in Rice
Jiang Hu,Yuexing Wang,Yunxia Fang,Longjun Zeng,Jie Xu,Haiping Yu,Zhenyuan Shi,Jiangjie Pan,Dong Zhang,Shujing Kang,Li Zhu,Guojun Dong,Longbiao Guo,Dali Zeng,Guangheng Zhang,Lihong Xie,Guosheng Xiong,Jiayang Li,Qian Qian +18 more
TL;DR: The cloning and characterization of a dominant QTL, grain size on chromosome 2 (GS2), which encodes Growth-Regulating Factor 4 (OsGRF4), a transcriptional regulator is reported, which could significantly enhance grain weight and increase grain yield in rice cultivars.
Journal ArticleDOI
Molecular Genetic Dissection of Quantitative Trait Loci Regulating Rice Grain Size
Jianru Zuo,Jiayang Li +1 more
TL;DR: These findings have paved new ways for understanding the molecular basis of grain size and have substantial implications for genetic improvement of crops.
Journal ArticleDOI
Compositional shifts in root-associated bacterial and archaeal microbiota track the plant life cycle in field-grown rice.
Joseph Edwards,Christian Santos-Medellín,Zachary Liechty,Bao Nguyen,Eugene Lurie,Shane Eason,Gregory C. Phillips,Venkatesan Sundaresan +7 more
TL;DR: Dense temporal sampling of 1,510 samples from root spatial compartments is used to characterize the bacterial and archaeal components of the root-associated microbiota of field grown rice over the course of 3 consecutive growing seasons, as well as 2 sites in diverse geographic regions and shows that shifts in the microbiome are correlated with rates of developmental transitions rather than age alone.
Journal ArticleDOI
Signaling pathways of seed size control in plants.
TL;DR: Recent research progress on seed size control is summarized, with particular emphasis on the genetic and molecular mechanisms of several newly identified regulators of seed size in Arabidopsis and rice.
References
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Journal ArticleDOI
Six-rowed barley originated from a mutation in a homeodomain-leucine zipper I-class homeobox gene
Takao Komatsuda,Mohammad Pourkheirandish,Congfen He,Perumal Azhaguvel,Hiroyuki Kanamori,Dragan Perovic,Nils Stein,Andreas Graner,Thomas Wicker,Akemi Tagiri,Udda Lundqvist,Tatsuhito Fujimura,Makoto Matsuoka,Takashi Matsumoto,Masahiro Yano +14 more
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Auxin conjugates: their role for plant development and in the evolution of land plants
TL;DR: The function of auxin conjugates has been mainly elucidated by mutant analysis in genes for synthesis or hydrolysis and a possible function for conjugate inferred from these results, but there is increasing evidence of the occurrence of peptides and proteins modified by IAA.
Journal ArticleDOI
Simple RNAi vectors for stable and transient suppression of gene function in rice.
Daisuke Miki,Ko Shimamoto +1 more
TL;DR: A Gateway vector, pANDA, is developed for RNA interference of rice genes to help identify the functions of genes whose tagged mutants are not available at present and complement existing methods for functional genomics of rice.
Journal ArticleDOI
Comprehensive Expression Profiling of Rice Grain Filling-Related Genes under High Temperature Using DNA Microarray
TL;DR: Among high temperature-tolerant and sensitive cultivars, alterations of neither amylopectin chain-length distribution nor amylose content were correlated to the degree ofgrain chalkiness, but rather seemed to be correlated to grain weight decrease, implying different underlying mechanisms for the varietal difference in grain chalkiness.
Journal ArticleDOI
The Complex History of the Domestication of Rice
Megan Sweeney,Susan R. McCouch +1 more
TL;DR: The evolutionary history of rice is complex, but recent work has shed light on the genetics of the transition from wild (O. rufipogon and O. nivara) to domesticated rice, indicating that different populations are fixed for different networks of alleles conditioning these traits.