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Molecular Plant 2024年第4期17卷 672-675页

作者： Ning Xiao Yunyu Wu Xiaoxiang Zhang Zeyun Hao Zichun Chen Zefeng Yang Yue Cai Ruyi Wang Ling Yu Zhiping Wang Yue Lu Wei Shi Cunhong Pan Yuhong Li Changhai Zhou Jianju Liu Niansheng Huang Guangqing Liu Hongjuan Ji Shuhao Zhu Shuai Fang Yuese Ning Aihong Li 不详

(Molecular Plant 16,1832-1846,November 62023)The originally published version of this manuscript contained several small mistakes in the labels and legends of main and supplemental figures,along with a few small mistakes in the main text,that have now been corrected.Specifically,in Figure 6G,the label“NILGY31^(Pijx)”has been corrected to“NIL^(Pijx)”,and in the legend of Figure 6H,“PPL^(Pijx Piz-t)”and“PPL^(Pijx Pigm)”have been corrected to“NIL^(Piz-t Pijx)”and“PPL^(Pigm Pijx).”In Figure S8A。

关键词： seedling Figure panicle

Carotenoid isomerase regulates rice tillering and grain productivity by its biosynthesis pathway

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Journal of Integrative Plant Biology 2024年第2期66卷 172-175页

作者： Chaoqing Ding Zhengji Shao Yuping Yan Guangheng Zhang Dali Zeng Li Zhu Jiang Hu Zhenyu Gao Guojun Dong Qian Qian Deyong Ren State Key Laboratory of Rice Biology and Breeding ChinaNational Rice Research InstituteHangzhou 310006China

Tillers are unique inflorescence-like branches in grasses,and their number determines the panicle number,plant architecture,and yield(Shang et al.,2021).Tiller formation mainly undergoes axillary meristem(AM)initiation and tiller bud outgrowth(Wang et al.,2018;Yan et al.,2023).The rice(Oryza sativa)KNOX gene OSH1 is expressed in AMs,and an osh1 mutant produces fewer tillers(Tanaka et al.,2015).

关键词： sativa Oryza panicle

Effect of GW8 Gene Editing on Appearance Quality of Erect-panicle Type (dep1) Japonica Rice

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Rice science 2023年第5期30卷 359-363,I0002-I0006页

作者： MAO Ting CHEN Hongfa LI Xin LIU Yan ZHONG Shuncheng WANG Shiyu ZHAO Yizhou ZHANG Zhan NI Shanjun HUANG He LI Xu HU Shikai Liaoning Institute of Saline-Alkali and Utilization Panjin 124010China State Key Laboratory of Rice Biology and Breeding/China National Center for Rice Improvement China National Rice Research InstituteHangzhou 310006China

Most high-yielding japonica rice varieties in China carry dep1,a multi-effective regulator of plant architecture and grain shape,resulting in erect panicle with short and round grain shape.However,its appearance quality needs to be improved since long-grain rice is favored by the market.GW8 is a dominant gene regulating grain shape,and its loss-of-function genotype leads to elongated grains with a better quality in appearance.

关键词： panicle grain yielding

Genetic Dissection of Quantitative Trait Loci for panicle Traits and Heat Tolerance by High-Density Bin Map in Rice

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Rice science 2022年第6期29卷 507-511,I0007-I0020页

作者： LIU Hongyan MA Xiaosong LI Enxi ZENG Xianjun LUO Lijun Shanghai Agrobiological Gene Center Shanghai 201106China Key Laboratory of Grain Crop Genetic Resources Evaluation and Utilization Ministry of Agriculture and Rural AffairsShanghai 201106China Hainan University Haikou 570228China Huazhong Agricultural University Wuhan 430070China

A recombinant inbred line(RIL)with 179 lines derived from a cross between a heat tolerant line Huhan 1B and a heat sensitive line Hanhui 3 was used for QTL mapping for panicle traits and heat tolerance.A total of 52 QTLs were identified with LOD scores from 3.85 to 54.93,each explaining 0.70%to 21.48%of the phenotypic variances,including 11 for panicle length(PL),11 for seed number per panicle(SN),14 for spikelet number per panicle(SNPP),6 for seed-setting rate(SSR)under normal conditions,and 5 for seed-setting rate(SSR_HT)and 5 for relative seed-setting rate(RSSR)under heat stress,respectively.

关键词： panicle Traits Map

Short panicle 3 controls panicle architecture by upregulating APO2/RFL and increasing cytokinin content in rice

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Journal of Integrative Plant Biology 2019年第9期61卷 987-999页

作者： Yong Huang Xufeng Bai Meifang Luo Yongzhong Xing National Key Laboratory of Crop Genetic Improvement Huazhong Agricultural UniversityWuhan 430070China

Inflorescence architecture is a major determinant of spikelet numbers per panicle, a key component of grain yield in rice. In this study, Short panicle 3(SP3) was identified from a short panicle 3(sp3) mutant in which T-DNA was inserted in the promoter of SP3, resulting in a knockdown mutation. SP3 encodes a DNA binding with one finger(Dof) transcriptional activator. Quantitative real time(q RT)-PCR and RNA in situ hybridization assays confirmed that SP3 is preferentially expressed in the young rice inflorescence, specifically in the branch primordial regions. SP3 acts as a negative regulator of inflorescence meristem abortion by upregulating APO2/RFL. SP3 both up-and downregulates expression of genes involved in cytokinin biosynthesis and catabolism, respectively. Consequently, cytokinin concentrations are decreased in young sp3 panicles, thereby leading to small panicles having fewer branches and spikelets. Our findings support a model in which SP3 regulates panicle architecture by modulating cytokinin homeostasis. Potential applications to rice breeding, through gene-editing of the SP3 promoter are assessed.

关键词： DNA controls panicle architecture RFL APO

Determination of rice panicle numbers during heading by multi-angle imaging

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The Crop Journal 2015年第3期3卷 211-219页

作者： Lingfeng Duan Chenglong Huang Guoxing Chen Lizhong Xiong Qian Liu Wanneng Yang College of Engineering Huazhong Agricultural University Britton Chance Center for Biomedical Photonics Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River Huazhong Agricultural University National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research Huazhong Agricultural University

Plant phenomics has the potential to accelerate progress in understanding gene functions and environmental responses. Progress has been made in automating high-throughput plant phenotyping. However, few studies have investigated automated rice panicle counting. This paper describes a novel method for automatically and nonintrusively determining rice panicle numbers during the full heading stage by analyzing color images of rice plants taken from multiple angles. Pot-grown rice plants were transferred via an industrial conveyer to an imaging chamber. Color images from different angles were automatically acquired as a turntable rotated the plant. The images were then analyzed and the panicle number of each plant was determined. The image analysis pipeline consisted of extracting the i2 plane from the original color image, segmenting the image, discriminating the panicles from the rest of the plant using an artificial neural network, and calculating the panicle number in the current image. The panicle number of the plant was taken as the maximum of the panicle numbers extracted from all 12 multi-angle images. A total of 105 rice plants during the full heading stage were examined to test the performance of the method. The mean absolute error of the manual and automatic count was 0.5, with 95.3% of the plants yielding absolute errors within ± 1. The method will be useful for evaluating rice panicles and will serve as an important supplementary method for high-throughput rice phenotyping.

关键词： Plant phenotyping Rice panicle number Multi-angle imaging Image analysis

Genetic control of panicle architecture in rice

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The Crop Journal 2021年第3期9卷 590-597页

作者： Gangling Li Hongliang Zhang Jinjie Li Zhanying Zhang Zichao Li State Key Laboratory of Agrobiotechnology/Beijing Key Laboratory of Crop Genetic Improvement College of Agronomy and BiotechnologyChina Agricultural UniversityBeijing 100193China

Rice panicle architecture affects grain number per panicle and thereby grain yield.Many genes involved in control of panicle architecture have been identified in the past decades.According to their effect on phenotype,these genes are divided into three categories:panicle branch and lateral spikelets,multifloret spikelets,and panicle type.We review these genes,describe their genetic regulatory network,and propose a strategy for using them in rice breeding.These findings on rice panicle architecture may facilitate related studies in other crops.

关键词： Rice panicle Grain number per panicle Breeding

SNP-based QTL mapping for panicle traits in the japonica super rice cultivar Liaoxing 1

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The Crop Journal 2020年第5期8卷 769-780页

作者： Mingzhu Zhao Zuobin Ma Lili Wang Zhiqiang Tang Ting Mao Chuanbin Liang Hong Gao Liying Zhang Na He Liang Fu Changhua Wang Guomin Sui Wenjing Zheng Institute of Rice Research Liaoning Academy of Agricultural SciencesShenyang 110000LiaoningChina Institute of Rice Research Shenyang Agricultural UniversityShenyang 110161LiaoningChina Liaoning Province Saline and Alkaline Land Utilization and Research Institute Panjin 124010LiaoningChina

panicle traits directly associated with yield are a target of selection in rice breeding.Although abundant QTL for panicle traits have been identified,there is little information about the genetic basis of panicle traits in japonica super rice(JSR)cultivars.In this study,we identified QTL for panicle traits in three environments using a population of recombinant inbred lines(RILs)derived from the JSR cultivar Liaoxing 1.A total of 197 RILs were genotyped with 285 polymorphic SNP markers.Phenotypic data and best linear unbiased prediction(BLUP)value of primary branch number(BNP),secondary branch number(BNS),grain number on primary branch(GNP),grain number on secondary branch(GNS),grain number per panicle(GN),panicle length(PL)and grain density(GD)were used for QTL mapping.A total of 105 QTL for seven panicle traits were detected in single environments using their BLUP values.Individual QTL explained 0.51%–52.22%of the phenotypic variation.Of the 105,49 were also detected by joint multi-environment analyses.Five stable QTL:qGD9,qPL9,qGNP9,qGN6,and qBNS6.2 were identified in multiple environments.qGD9,qGNP9,and qPL9,co-localizing on chromosome 9,likely correspond to the known gene DEP1.Importantly,qGN6 and qBNS6.2 in a co-localization region were identified as novel QTL,and their Liaoxing 1 alleles had a positive effect.Several RILs with the QTL allele combinations qGD9/qPL9/qGNP9 and qGN6/qBNS6.2 showed greater GN.Further investigation of the putative gene underlying qGN6/qBNS6.2 would shed light on the molecular mechanism of JSR.

关键词： cultivar panicle effect.

Physiological and ecological characteristics of rice with erect panicle and prospects of their utilization

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Chinese Science Bulletin 1996年第19期41卷 1642-1648页

作者：徐正进陈温福周洪飞张龙步杨守仁 Agronomy Department Shenyang Agrioiltural University Shenyang 110161 China

In the early 1960s, Yin et al. studied the effect of spike on the light utilization of plant population and pointed out that erect wheat spike had a smaller shaded area which was favorable to photosynthesis, and that the increase in light extinction coefficient of rice in the middle and late milking stages was probably related to the gradual curving and drooping of rice panicle during that stage. These viewpoints were echoed in some other reports. But on the contrary, some people considered that the curved panicle with an erect flag leaf above it could avoid the unfavorable effect of panicle on light

关键词： rice plant type erect panicle type ecological environment of population photosynthesis and biomass production.

RGB1 Regulates Rice panicle Architecture and Grain Filling Through Monitoring Cytokinin Level in Inflorescence Meristem and Grain Abscisic Acid Level During Filling Stage

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Rice science 2021年第4期28卷 317-321,I0008-I0011页

作者： Zhang Dongping Zhang Minyan Wang Yuzhu Liang Jiansheng Key Laboratory of Molecular Design for Plant Cell Factory of Guangdong Higher Education Institute Department of BiologySouthern University of Science and TechnologyShenzhen 518055China Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops Key Laboratory of Plant Functional Genomics of the Ministry of EducationYangzhou UniversityYangzhou 225009China

RGB1 regulated not only rice panicle architecture but also the grain filling process.Suppression of RGB1 expression resulted in a denser panicle and smaller grain size and weight,which was largely due to the lower endogenous cytokinin(CK)level caused by the increased expression of cytokinin oxidase genes in the inflorescence meristem.Suppression of RGB1 expression also significantly delayed the grain development and reduced the starch accumulation rate through reducing grain abscisic acid(ABA)accumulation during early filling stage.Exogenous ABA can partially rescue the detrimental effects of suppression of RGB1 expression on starch accumulation and grain weight.In conclusion,RGB1 regulated rice panicle architecture and grain filling through monitoring CK level in the inflorescence meristem and grain ABA level during filling stage.

关键词： panicle filling Grain