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Genetic dissection and validation of a major QTL for grain weight on chromosome 3B in bread wheat(Triticum aestivum L.)

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Journal of Integrative Agriculture 2024年第1期23卷 77-92页

作者： Simin Liao Zhibin Xu Xiaoli Fan Qiang Zhou Xiaofeng Liu Cheng Jiang Liangen Chen Dian Lin Bo Feng Tao Wang Chengdu Institute of Biology Chinese Academy of SciencesChengdu 610041China University of Chinese Academy of Sciences Beijing 100049China The Innovative Academy of Seed Design Chinese Academy of SciencesBeijing 100101China

grain weight is one of the key components of wheat(Triticum aestivum L.)*** manipulation of grain weight is an efficient approach for improving yield potential in breeding programs.A recombinant inbred line(RIL)population derived from a cross between W7268 and Chuanyu 12(CY12)was employed to detect quantitative trait loci(QTLs)for thousand-grain weight(TGW),grain length(GL),grain width(GW),and the ratio of grain length to width(GLW)in six *** major QTLs,***-2D,***-2D,***-3B,***-4B.1,***-2D.1,***-2D.1 and ***-3B.1,were consistently identified in at least four environments and the best linear unbiased estimation(BLUE)datasets,and they explained 2.61 to 34.85%of the phenotypic *** interactions were detected between the two major TGW QTLs and three major GW *** addition,***-3B.1 and ***-3B were co-located,and the improved TGW at this locus was contributed by *** other loci,***-3B.1/***-3B had no effect on grain number per spike(GNS).They were further validated in advanced lines using Kompetitive Allele Specific PCR(KASP)markers,and a comparison analysis indicated that ***-3B.1/***-3B is likely a novel *** haplotypes were identified in the region of this QTL and their distribution frequencies varied between the landraces and *** to gene annotation,spatial expression patterns,ortholog analysis and sequence variation,the candidate gene of ***-3B.1/***-3B was ***,the major QTLs and KASP markers reported here provide valuable information for elucidating the genetic architecture of grain weight and for molecular marker-assisted breeding in grain yield improvement.

关键词： thousand-grain weight QTL mapping haplotype analysis candidate gene

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Identification and validation of major QTL for grain size and weight in bread wheat(Triticum aestivum L.)

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The Crop Journal 2023年第2期11卷 564-572页

作者： Guangsi Ji Zhibin Xu Xiaoli Fan Qiang Zhou Liangen Chen Qin Yu Simin Liao Cheng Jiang Bo Feng Tao Wang Chengdu Institute of Biology Chinese Academy of SciencesChengdu 610041SichuanChina University of Chinese Academy of Sciences Beijing 100049China The Innovative Academy of Seed Design Chinese Academy of SciencesBeijing 100101China

grain size and weight are key components of wheat *** of major underlying quantitative trait loci(QTL)can improve yield potential in wheat breeding.A recombinant inbred line(RIL)population was constructed to detect QTL for thousand-grain weight(TGW),grain length(GL)and grain width(GW)across eight *** regions associated with grain size and grain weight were identified on chromosomes 4A and 6A using bulked segregant exome sequencing(BSE-Seq)*** constructing genetic maps,six major QTL detected in at least four individual environments and in best linear unbiased estimator(BLUE)datasets,explained 7.50%-23.45%of the phenotypic *** for ***-4A,the other five QTL were co-located in two regions,namely QTgw/***-4A and QTgw/Gw/*** of these QTL were *** QTgw/Gw/***-6A,QTgw/***-4A and ***-4A had no effect on grain number per spike(GNS).The QTL were validated in a second cross using Kompetitive Allele Specific PCR(KASP)*** QTgw/***-4A was probably a novel locus,it and the KASP markers reported here can be used in wheat ***4A03G0191200 was predicted to be potential candidate gene for QTgw/***-4A based on the sequence differences,spatiotemporal expression patterns,gene annotation and haplotype *** findings will be useful for fine mapping and for marker-assisted selection in wheat grain yield improvement.

关键词： BSE-Seq thousand-grain weight grain length grain width QTL mapping

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Introgression of chromosome 6PL terminal segment from Agropyron cristatum to increase both grain number and grain weight in wheat

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The Crop Journal 2023年第3期11卷 878-886页

作者： Yida Lin Shenghui Zhou Xuezhong Liang Bing Han Junli Yang Baojin Guo Jinpeng Zhang Haiming Han Weihua Liu Xinming Yang Xiuquan Li Lihui Li State Key Laboratory of Crop Stress Biology for Arid Areas and College of Agronomy Northwest A&F UniversityYangling 712100ShannxiChina National Key Facility for Crop Gene Resources and Genetic Improvement/Institute of Crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081China

Agropyron cristatum(2n=4x=28,PPPP),which harbours many high-yield and disease-resistance genes,is a promising donor for wheat *** genetic diversity and the trade-off between grain weight and grain number have become bottlenecks for increasing grain yield in *** this study,a novel translocation line,WAT650l,was derived from the chromosome 6P addition line 4844–12,which can simultaneously increase both grain number per spike(GNS)and thousand-grain weight(TGW).Cytological analysis and molecular marker analysis revealed that WAT650l was a 5BL.5BS-6PL(bin 12–17)translocation *** of agronomic traits and analysis of the BC4F2 and BC5F2 populations suggested that the 6PL terminal chromosome segment in WAT650l resulted in increased grain number per spike(average increased by 14.07 grains),thousand-grain weight(average increased by 4.31 g),flag leaf length,plant height,spikelet number per spike and kernel number per spikelet during the two growing seasons of 2020–2021 and 2021–***,the increased GNS locus and high-TGW locus of WAT650l were mapped to the bins 16–17 and 12–13,respectively,on chromosome 6PL by genetic population analysis of three translocation *** summary,we provide a valuable germplasm resource for broadening the genetic base of wheat and overcoming the negative relationship between GNS and TGW in wheat breeding.

关键词： Agropyron cristatum Wheat grain number per spike thousand-grain weight Translocation lines

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HapIII of TaSAP1-A1, a Positively Selected Haplotype in Wheat Breeding

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Journal of Integrative Agriculture 2014年第7期13卷 1462-1468页

作者： CHANG Jian-zhong HAO Chen-yang CHANG Xiao-ping ZHANG Xue-yong JING Rui-lian National Key Facility for Crop Gene Resources and Genetic Improvement/Institute of Crop Science Chinese Academy of Agricultural Sciences

Stress-associated protein （SAP） has functions in maintaining plant cell elongation, embryo development and response to abiotic stresses. TaSAP1-A1, one of the Triticum aestivum SAP1 （TaSAP1） members located on wheat chromosome 7A was isolated for polymorphism analysis. HaplII of TaSAP1-A1 was found significantly associated with thousand-grain weight （TGW） in multiple environments. In this study, HaplII also made a positive contribution to TGW in Population 2. The distribution of TaSAP1-A1 HapIII was tracked among varieties released in different years and geographical environments of China. The frequency of HapIII showed an increasing trend during the breeding process in two different populations. The ItapIII was gradually selected and applied from 6.36% in landraces to 13.50% in modem varieties. These results exhibited that TaSAP1-A1 HapIII was positively selected during wheat breeding, which is beneficial for grain-yield improvement. The preferred HapIIl was initially selected and applied in the higher latitude areas of China in accord with the long day season and longer grain filling stage in these areas. Moreover, the frequency of HaplII in recent modem varieties was still quite low （19.29-26.67%）. It indicated a high application potential of TaSAP1-A 1 HapIII for improving grain yield in wheat breeding.

关键词： wheat (Triticum aestivum L.) TaSAP1-A1 HapIII frequency distribution thousand-grain weight grain yield improvement

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QTL Mapping of grain weight Trait in Rice

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Agricultural Biotechnology 2018年第5期7卷 13-15页

作者： Xichun ZHANG Ying LIU Dashuang ZHANG Jianqiang WU Jifeng WANG Peiying HUANG Susong ZHU Guizhou Rice Research Institute Guiyang 50006China

To provide new experimental materials for QTL analysis of rice yield trait, we constructed a mapping population of 150 1ines （recombination inbred lines, R1L） derived from a cross between rice varieties V20B and CPSLO17, and localized QTLs and evaluated the genetic effects in the two parents and 150 RILs for thousand-grain weight trait by using internal mapping method of software MapQTL5 combining thousand-grain weight phenotypic data of the RILs. The results showed that a new QTL （qTGW-3） related to thousand-grain weight trait was detected. Individual QTL （LOD=4.14） explained 11.9% of the observed phenotypic variance. And the QTL alleles came from the parent V20B.

关键词： Rice RIL thousand-grain weight Mapping population QTL

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第十四届全国植物基因组学大会

作者： Yonghong Tao Jianlong Xu Institute of Crop Sciences National Key Facility for Crop Gene Resources and Genetic ImprovementChinese Academy of Agricultural Sciences

Rice(Oryza sativa L.) is a staple food for more than half of the world population, therefore increasing crop yield is one of the most important goals of plant science *** 496 introgression lines(ILs) derived from the ... 详细信息

关键词： quantitative trait loci gene×environment interaction introgression lines panicle length spikelets per panicle grains per panicle thousand-grain weight heading date yield pleiotropy

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