Search results for: Yuchun Rao

Items from 1 to 16 out of 16 results

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UDP‐N‐acetylglucosamine pyrophosphorylase enhances rice survival at high temperature

Saisai Xia, He Liu, Yuanjiang Cui, Haiping Yu, more

High‐temperature stress inhibits normal cellular processes and results in abnormal growth and development in plants. However, the mechanisms by which rice (Oryza sativa) copes with high temperature are not yet fully understood. In this study, we identified a rice high temperature enhanced lesion spots 1 (hes1) mutant, which displayed larger and more dense necrotic spots under high temperature...

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PHOTO‐SENSITIVE LEAF ROLLING 1 encodes a polygalacturonase that modifies cell wall structure and drought tolerance in rice

Guangheng Zhang, Xin Hou, Li Wang, Jing Xu, more

New Phytologist > 229 > 2 > 890 - 901

The biosynthesis and modification of cell wall composition and structure are controlled by hundreds of enzymes and have a direct consequence on plant growth and development. However, the majority of these enzymes has not been functionally characterised. Rice mutants with leaf‐rolling phenotypes were screened in a field. Phenotypic analysis under controlled conditions was performed for the selected...

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AH2 encodes a MYB domain protein that determines hull fate and affects grain yield and quality in rice

Deyong Ren, Yuanjiang Cui, Haitao Hu, Qiankun Xu, more

The Plant Journal > 100 > 4 > 813 - 824

The palea and lemma (hull) are grass‐specific organs, and determine grain size and quality. In the study, AH2 encodes a MYB domain protein, and functions in the development of hull and grain. Mutation of AH2 produces smaller grains and alters grain quality including decreased amylose content and gel consistency, and increased protein content. Meantime, part of the hull lost the outer silicified cells,...

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A Nck‐associated protein 1‐like protein affects drought sensitivity by its involvement in leaf epidermal development and stomatal closure in rice

Lichao Huang, Long Chen, Lan Wang, Yaolong Yang, more

The Plant Journal > 98 > 5 > 884 - 897

Water deficit is a major environmental threat affecting crop yields worldwide. In this study, a drought stress‐sensitive mutant drought sensitive 8 (ds8) was identified in rice (Oryza sativa L.). The DS8 gene was cloned using a map‐based approach. Further analysis revealed that DS8 encoded a Nck‐associated protein 1 (NAP1)‐like protein, a component of the SCAR/WAVE complex, which played a vital role...

article

MULTI-TILLERING DWARF1, a new allele of BRITTLE CULM 12, affects plant height and tiller in rice

Haiping Yu, Deyong Ren, Yangzhou Zhu, Jiangmin Xu, more

Chinese Science Bulletin > 2016 > 61 > 23 > 1810-1817

Plant height and tillering are crucial factors determining rice plant architecture and influencing rice grain production. In this study, multi-tillering dwarf1 (mtd1), a stable multi-tiller and dwarf mutant, was screened from the ethylmethane sulfonate-treated japonica rice variety Wuyunging7. Compared with the wild type, mtd1 mutant exhibited pleiotropic phenotypes, including dwarfism, more tillers,...

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The pleiotropic ABNORMAL FLOWER AND DWARF1 affects plant height, floral development and grain yield in rice

Deyong Ren, Yuchun Rao, Liwen Wu, Qiankun Xu, more

Journal of Integrative Plant Biology > 58 > 6 > 529 - 539

Moderate plant height and successful establishment of reproductive organs play pivotal roles in rice grain production. The molecular mechanism that controls the two aspects remains unclear in rice. In the present study, we characterized a rice gene, ABNORMAL FLOWER AND DWARF1 (AFD1) that determined plant height, floral development and grain yield. The afd1 mutant showed variable defects including...

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Fine Mapping Identifies a New QTL for Brown Rice Rate in Rice (Oryza Sativa L.)

Deyong Ren, Yuchun Rao, Lichao Huang, Yujia Leng, more

Rice > 2016 > 9 > 1 > 1-10

Background High yield and quality determine the commercial potential of rice variety. Brown rice rate (BRR) is a key factor ensuring grain yield and quality in rice. So far, there were few reports about the genes that directly controlled the BRR in rice. Therefore, dissecting the genetic mechanism of the BRR genes can facilitate improving effective rice supply or edible grain yield. Results...

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Genetic Dissection for Chlorophyll Content of the Top Three Leaves During Grain Filling in Rice (Oryza sativa L.)

Lichao Huang, Liping Dai, Lan Wang, Yujia Leng, more

Journal of Plant Growth Regulation > 2015 > 34 > 2 > 381-391

Leaf senescence and the consequent decline in chlorophyll (Chl) content is a normal event in the life cycle of plants. Although many studies on Chl content or leaf senescence in rice have been conducted, the understanding of this process is limited. By using a double haploid population derived from a cross between japonica Chunjiang06 (CJ06) and indica Taichong native (TN1), quantitative trait locus...

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Characterization and cloning of SMALL GRAIN 4, a novel DWARF11 allele that affects brassinosteroid biosynthesis in rice

Zhenyuan Shi, Yuchun Rao, Jie Xu, Shikai Hu, more

Chinese Science Bulletin > 2015 > 60 > 10 > 905-915

Brassinosteroids (BRs) are important hormones that regulate plant development and physiology. Substantial progresses have been made in BR-related studies, and especially an increasing number of new genes involved in BR biosynthesis have been identified. Here, we characterize a BR-related rice mutant, small grain 4 (sg4), obtained from callus culture of japonica cultivar Nipponbare. This mutant showed...

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A New-Nipponbare Rice Germplasm with High Seed-Setting Rate

Jiang Hu, Guojun Dong, Yunxia Fang, Yuchun Rao, more

Journal of Genetics and Genomics > 2014 > 41 > 10 > 549-552

article

SMALL GRAIN 1, which encodes a mitogen‐activated protein kinase kinase 4, influences grain size in rice

Penggen Duan, Yuchun Rao, Dali Zeng, Yaolong Yang, more

The Plant Journal > 77 > 4 > 547 - 557

Although grain size is one of the most important components of grain yield, little information is known about the mechanisms that determine final grain size in crops. Here we characterize rice small grain1 (smg1) mutants, which exhibit small and light grains, dense and erect panicles and comparatively slightly shorter plants. The short grain and panicle phenotypes of smg1 mutants are caused by a defect...

article

Recent progress on molecular breeding of rice in China

Yuchun Rao, Yuanyuan Li, Qian Qian

Plant Cell Reports > 2014 > 33 > 4 > 551-564

Molecular breeding of rice for high yield, superior grain quality, and strong environmental adaptability is crucial for feeding the world’s rapidly growing population. The increasingly cloned quantitative trait loci and genes, genome variations, and haplotype blocks related to agronomically important traits in rice have provided a solid foundation for direct selection and molecular breeding, and a...

article

Characterization and cloning of a brittle culm mutant (bc88) in rice (Oryza sativa L.)

YuChun Rao, YaoLong Yang, DeDong Xin, XiaoJing Li, more

Chinese Science Bulletin > 2013 > 58 > 24 > 3000-3006

This study characterizes a brittle culm (bc88) mutant of rice (Oryza sativa L.) obtained by ethylene methylsulfonate (EMS)-in-duced mutagenesis of Wuyunjing 7. The bc88 mutant exhibits a diversity of pleiotropic phenotypes, including brittle culm at the whole-plant growth stages, withered leaf tips at the seedling stage, and 18-d delay in heading date at the mature stage. Genetic analysis indicates...

article

Map-based cloning proves qGC-6, a major QTL for gel consistency of japonica/indica cross, responds by Waxy in rice (Oryza sativa L.)

Yan Su, Yuchun Rao, Shikai Hu, Yaolong Yang, more

Theoretical and Applied Genetics > 2011 > 123 > 5 > 859-867

In this study, one major QTL affecting gel consistency (GC) of japonica/indica cross was identified on chromosome 6 using a DH population. To understand the molecular mechanism that regulates GC in rice grains, the major QTL (qGC-6) was isolated through a map-based cloning approach utilizing chromosome segment substitution lines (CSSLs). Using 64 plants with extremely soft GC that were selected on...

article

Characterization and fine mapping of an early senescence mutant (es-t) in Oryza sativa L.

YaoLong Yang, YuChun Rao, HuiJuan Liu, YunXia Fang, more

Chinese Science Bulletin > 2011 > 56 > 23 > 2437-2443

An es-t (early senescence-temporary) mutant, produced by ethylene methylsulfonate treatment of strain Nipponbare, was identified in rice. The leaves of es-t appeared yellow at the seedling stage, and had decreased chlorophyll content. Rust spots were found during growth in es-t, especially at the leaf margin and tip. The plants showed a typical early-senescence phenotype at the milky stage. The leaf...

article

Genetic analysis of leaffolder resistance in rice

Yuchun Rao, Guojun Dong, Dali Zeng, Jiang Hu, more

Journal of Genetics and Genomics > 2010 > 37 > 5 > 325-331

A double haploid (DH) population, which consists of 120 lines derived from anther culture of a typical indica and japonica hybrid ‘CJ06’/‘TN1’, was used to investigate the genetic basis for rice leaffolder resistance. Using a constructed molecular linkage map, five QTLs for rolled leaves were detected on chromosomes 1, 2, 3, 4, and 8. The positive alleles from CJ06 on chromosomes 3, 4, and 8 increased...

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