Molecular, cellular and Yin-Yang regulation of grain size and number in rice

Fan, Ye‐Yang; Li, Y. B.

doi:10.1007/s11032-019-1078-0

Cited by 42 publications

(32 citation statements)

References 190 publications

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“…These two major components of sink strength generally constrain each other due to a negative correlation between grain size and grain number per panicle. The article entitled Molecular, cellular, and Yin-Yang regulation of grain size and number in rice by Fan and Li (2019) provided a comprehensive and systematical overview of the recent researches and future perspectives in coordinating grain size and number in rice, which has substantial implications for breaking the yield bottleneck caused by the trade-off of grain size and number in crop genetic improvement. Grain size and number are determined by the size, activity and number of inflorescence, and branch and floral meristems, which are coordinately regulated by both rate and duration of cell division, expansion, and differentiation.…”

Section: Yield Capacitymentioning

confidence: 99%

Rice functional genomics: theories and practical applications

Xiong

Uga

2020

Mol Breeding

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Rice is not only a staple food crop worldwide but also a key model cereal crop for genomic and plant science research. Rice has made great progress in the last three decades in functional genomics and genetic improvement, playing a leading role among crops. Aiming to realize less pesticide, less chemical fertilizer, water saving and drought resistance, and acceptable grain quality and high yield in rice production, Green Super Rice (GSR), proposed by Prof. Qifa Zhang (Huazhong Agricultural University, China), provides a promising strategy for sustainable agriculture and will be boosted by the breakthrough and systematical achievements of rice functional genomics. Thus, the Editor-in-Chief of Molecular Breeding, Prof. Qifa Zhang, invited Prof. Lizhong Xiong (Huazhong Agricultural University, China) and Prof. Yusaku Uga (National Agriculture and Food Research Organization, Japan) as two guest editors to host the special issue named "Rice Functional

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Section: Yield Capacitymentioning

confidence: 99%

Rice functional genomics: theories and practical applications

Xiong

Uga

2020

Mol Breeding

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“…To date, 20 grain size related QTLs with large-effect have been cloned and characterized. Several signals and regulatory pathways controlling grain size have been identified in rice, such as the G-protein signaling pathway, the ubiquitin-proteasome pathway, the mitogen-activated protein kinase (MAPK) signaling pathway, the phytohormone signaling, and transcriptional regulators (Fan and Li 2019;Li and Li 2016). GS3 and DEP1 encode G-protein γ-subunits and regulate grain size and weight (Fan et al 2006;Huang et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Dissection of Closely Linked QTLs Controlling Grain Size in Rice

Xue

Chen

XiaoXia

et al. 2021

Preprint

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Grain size is a key constituent of grain weight and appearance in rice. However, insufficient attention has been paid to the small-effect QTLs on grain size. In the present study, residual heterozygous populations were developed for mapping two genetically linked small-effect QTLs for grain size. After genotyping and phenotyping of five successive generations, qGS7.1 was dissected into three QTLs and two were selected for further analysis. qTGW7.2a was finally mapped into a 21.10-kb interval containing four annotated candidate genes. Transcript levels assay showed that the expression of candidates LOC_Os07g39490 and LOC_Os07g39500 were significantly reduced in the NIL- qTGW7.2a BG1 . Cytological observation indicated that qTGW7.2a regulated grain width through controlling cell expansion. Use the same strategy, qTGW7.2b was fine mapped into a 52.71-kb interval, showing a significant effect on grain length and width with opposite allelic directions but little on grain weight. Our study provides new genetic resources for yield improvement and fine-tunes of grain size in rice.

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“…Grain size or shape with diverse variations in rice is an important target trait of stable yield, grain appearance and milling quality, domestication and breeding, and about ten QTL genes controlling the trait have been identi ed in past fteen years [18][19][20] . Grain size is determined by its three geometrical dimensions: grain length, width and thickness.…”

Section: Introductionmentioning

confidence: 99%

“…Grain size is determined by its three geometrical dimensions: grain length, width and thickness. G protein signaling, biosynthesis and signaling of BR, IAA and CK, peptide signaling, MAPK signaling, the ubiquitin-proteasome degradation pathway, epigenetic pathways and transcriptional regulation are revealed to be involved in regulation of grain size 19 . However, understanding the regulatory mechanisms among natural variations of grain size is still a grey system and becoming an important research eld in agricultural science in many subtle ways that may not be found based on analysis of arti cial mutants.…”

Section: Introductionmentioning

confidence: 99%

“…However, understanding the regulatory mechanisms among natural variations of grain size is still a grey system and becoming an important research eld in agricultural science in many subtle ways that may not be found based on analysis of arti cial mutants. Much more QTL genes controlling grain size in rice need to be identi ed for their regulatory mechanism studies based on QTG interactions 18,19 .…”

Section: Introductionmentioning

confidence: 99%

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WITHDRAWN: Differentially directional selection on grain size genes identified by RapMap during rice domestication

Zhang

et al. 2020

Preprint

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The ability to identify quantitative trait locus (QTL) genes controlling natural variation of important traits would facilitate the construction of a bridge between gene function analyses and domestication investigations. Grain size in rice is an important yield, quality and domestication trait. The molecular architecture and domestication signatures of grain size at population level remain unknown. Here we first introduce RapMap, a method for rapid and high-throughput QTL mapping employing a series of F2 gradient populations (F2GPs) constructed by trait-adjacent accessions from diverse germplasms. A co-segregation standard is set for simultaneously integrating the three-in-one framework in RapMap: detecting a real QTL, confirming its effect and obtaining its near-isogenic line-like line (NIL-LL), which greatly enhances the efficiency and robustness of QTL identification. Using 15 gradient populations, eight genes including two novel genes (GL1 and GW5.1) with different effects for grain size in rice were simultaneously discovered by RapMap in three years, which make more than two thirds of genetic contributions to grain size and shape in a mini-core collection worldwide. In-depth analyses of the eight genes employing a large and geographically diverse population, including 446 wild, 2462 landrace and 784 cultivar accessions, revealed that directional artificial selection of slender- and long- grains and their alleles played an important role during indica rice domestication. The genetic effects of the eight grain-size genes positively correlate with the differential selection intensities and the nucleotide variation intensities. Major grain-size genes fixed before the completion of rice domestication have been heavily selected for human requirements and cultivation practices. Generalizable application of the method and mimicking of the domestication nature will accelerate breeding modern cultivars.

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Molecular, cellular and Yin-Yang regulation of grain size and number in rice

Cited by 42 publications

References 190 publications

Rice functional genomics: theories and practical applications

Rice functional genomics: theories and practical applications

Dissection of Closely Linked QTLs Controlling Grain Size in Rice

WITHDRAWN: Differentially directional selection on grain size genes identified by RapMap during rice domestication

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