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Mapping QTL for flowering time-related traits under three plant densities in maize

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The crop Journal 2021年第2期9卷 372-379页

作者： Liwei Wang Zhiqiang Zhou Ronggai Li Jianfeng Weng Quanguo Zhang Xinghua Li Baoqiang Wang Wenying Zhang Wei Song Xinhai Li The Key Laboratory of crop Genetics and breeding of Hebei Province Institute of Cereal and Oil CropsHebei Academy of Agriculture and Forestry SciencesShijiazhuang 050035HebeiChina institute of crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081China

Flowering time is an indicator of adaptation in maize and a key trait for selection in *** genetic basis of flowering time in maize,especially in response to plant density,remains *** objective of this study was to identify maize quantitative trait loci(QTL)associated with flowering time-related traits that are stably expressed under several plant densities and show additive effects that vary with plant *** hundred recombinant inbred lines(RIL)derived from a cross between Ye 478 and Qi 319,together with their parents,were planted at three plant densities(90,000,120,000,and 150,000 plants ha^(-1))in four *** five traits investigated were days to tasseling(DTT),days to silking(DTS),days to pollen shed(DTP),interval between anthesis and silking(ASI),and interval between tasseling and anthesis(TAI).A high-resolution bin map was used for QTL *** the RIL population,the DTT,DTS,and DTP values increased with plant density,whereas the ASI and TAI values showed negligible response to plant density.A total of 72 QTL were identified for flowering time-related traits,including 15 stably expressed across *** flowering time under different densities seems to be regulated by complex pathways rather than by several major genes or an independent *** effects of some stable QTL,especially qDTT8-1 and qDTT10-4,varied with plant *** mapping and cloning of these QTL will shed light on the mechanism of flowering time and assist in breeding earlymaturing maize inbred lines and hybrids.

关键词： Maize Flowering time Plant density Recombinant inbred lines(RIL) Genetic basis

Deep genotyping of the gene GmSNAP facilitates pyramiding resistance to cyst nematode in soybean

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The crop Journal 2019年第5期7卷 677-684页

作者： Yu Tian Bo Liu Xuehui Shi Jochen C.Reif Rongxia Guan Ying-hui Li Li-juan Qiu The National Key Facility for crop Gene Resources and Genetic Improvement(NFCRI)/Key Lab of Germplasm Utilization(MOA) Institute of Crop SciencesChinese Academy of Agricultural Sciences100081 BeijingChina Department of breeding Research Leibniz Institute of Plant Genetics and Crop Plant Research(IPK)GaterslebenGermany

Soybean cyst nematode(SCN)is a highly destructive *** soybean host genome harbors at least two major genes for resistance(rhg1 and Rhg4),as well as a minor locus(SCN3-11).In the present study,a splicing site in GmSNAP11,the potential causal gene of SCN3-11,was identified by comparison of the GmSNAP11 cDNA sequences generated from resistant and susceptible soybean *** sequence information was used to design a codominant CAPS marker,GmSNAP11-2565,which was used to genotype a panel of 209 soybean accessions varying with respect to SCN *** of the effect of the haplotypes formed by GmSNAP11-2565 and another large-effect(nonsynonymous)locus,GmSNAP11-2307,previously identified in GmSNAP11,revealed linkage disequilibrium(P<0.0001)between the two loci,suggesting that GmSNAP11-2565 could be used as a marker for ***11-2565 was accordingly used,along with established markers for GmSNAP18(rhg1)and GmSHMT(Rhg4),to characterize the panel *** mean SCN female index of accessions carrying only the GmSNAP11 allele associated with resistance(20.3%)was higher than that associated with accessions carrying alleles for resistance at both GmSNAP11 and GmSNAP18(12.4%),while the index for accessions carrying alleles for resistance at all of GmSNAP11,GmSNAP18,and GmSHMT was very low(1.9%).Selection on all three markers was effective for maintaining a high level of resistance to SCN race 3.

关键词： SCN α-SNAP Allelic combination Marker-assisted selection(MAS) Haplotype analysis

Morphology and mapping analysis of rice(Oryza sativa L.)clustered spikelets(Cl)mutant

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Chinese Science Bulletin 2003年第6期48卷 559-562页

作者： ZHENG Leiying1, ZHU Xudong2, QIAN Qian2, ZHAO Zhong1, ZHANG Jianjun3, HU Xiaohe1, LIN Hongxuan1,4 & LUO Da1 1. National Key Laboratory of Plant Molecular Genetics, Shanghai In-stitute of Plant Physiology and Ecology, Chinese Academy of Sci-ences, Shanghai 200032, China 2. China National Rice Research institute, Hangzhou 310006, China 3. crop institute of breeding and cultivation, Shanghai Agricultural Academy, Shanghai 201106, China 4. Shanghai Anxin Research Foundation Laboratory, Shanghai 200032, China National Key Laboratory of Plant Molecular Genetics Shanghai Institute of Plant Physiology and Ecology Chinese Academy of Sciences Shanghai China China National Rice Research institute Hangzhou China crop institute of breeding and cultivation Shanghai Agricultural Academy Shanghai China Shanghai Anxin Research Foundation Laboratory Shanghai China

The rice clustered spikelets (Cl) mutant exhib-its a phenotype that most of branch apical have 2-3 spikelets clustered together. SEM (scanning electron microscope) ob-servation suggested that the Cl gene controlled branch apical development, and influenced the terminal spikelets elonga-tion. The spikelet number was reduced in mutant, indicating that Cl may also have an effect on spikelet number. To map Cl locus, two F2 mapping populations derived from the crosses between the Cl and ZhongHua11, and Cl and ZheFu802 were constructed, respectively. The Cl locus was roughly mapped between two CAPS markers, CK0214 and SS0324. A further fine mapping analysis showed that the Cl locus was mapped between makers R0674E and Cl2560, with genetic distances of 0.2 and 2.1 cM, respectively. Then we found a PAC contig spanning Cl locus, the region was delim-ited to 196 kb. This result was useful for cloning of the Cl gene. Allelism test demonstrated that Cl was allelic to Cl2, another rice clustered spikelets mutant.

关键词：水稻簇生小穗突变体分子标记基因图遗传分析植物形态 SEM

Identification of traits and genes associated with lodging resistance in maize

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The crop Journal 2021年第6期9卷 1408-1417页

作者： Yu Guo Yumei Hu Huan Chen Pengshuai Yan Qingguo Du Yafei Wang Hongqiu Wang Zhonghua Wang Dingming Kang Wen-Xue Li Key Laboratory of crop Heterosis and Utilization Ministry of EducationCollege of Agronomy and BiotechnologyChina Agricultural UniversityBeijing 100193China National Engineering Laboratory for crop Molecular breeding Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China

Lodging is a major problem limiting maize yield worldwide. However, the mechanisms of lodging resistance remain incompletely understood for maize. Here, we evaluated 443 maize accessions for lodging resistance in the field. Five lodging-resistant accessions and five lodging-sensitive accessions were selected for further research. The leaf number, plant height, stem diameter, and rind penetrometer resistance were similar between lodging-resistant and-sensitive inbred lines. The average thickness of sclerenchymatous hypodermis layer was thicker and the vascular area was larger in the lodging-resistant lines compared with lodging-sensitive lines. Although total lignin content in stem tissue did not significantly differ between lodging-resistant and-sensitive lines, phloroglucinol staining revealed that the lignin content of the cell wall in the stem cortex and in the stem vascular tissue near the cortex was higher in the lodging-resistant lines than in the lodging-sensitive lines. Analysis of strand-specific RNA-seq transcriptome showed that a total of 793 genes were up-regulated and 713 genes were down-regulated in lodging-resistant lines relative to lodging-sensitive lines. The up-regulated genes in lodging-resistant lines were enriched in cell wall biogenesis. These results indicated that modification of cell wall biosynthesis would contribute to lodging resistance of maize.

关键词： Lodging Sclerenchyma cell Lignin Differentially expressed genes Maize

Profiling of seed fatty acid composition in 1025 Chinese soybean accessions from diverse ecoregions

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The crop Journal 2020年第4期8卷 635-644页

作者： Ahmed M.Abdelghany Shengrui Zhang Muhammad Azam Abdulwahab S.Shaibu Yue Feng Yanfei Li Yu Tian Huilong Hong Bin Li Junming Sun The National Engineering Laboratory for crop Molecular breeding MARA Key Laboratory of Soybean Biology(Beijing)Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China crop Science Department Faculty of AgricultureDamanhour UniversityDamanhour 22516Egypt

The stability of soybean(Glycine max ***)oil is determined mainly by its fatty acid(FA)*** evaluated the FA composition of 1025 Chinese soybean accessions collected from diverse ecoregions and grown in multiple locations and *** observed highly significant differences(Pbreeding soybean with improved quality to meet human nutritional and industrial needs.

关键词： soybean breeding Glycine

Major Gene Identification and Quantitative Trait Locus Mapping for YieldRelated Traits in Upland Cotton(Gossypium hirsutum L.)

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Journal of Integrative Agriculture 2014年第2期13卷 299-309页

作者： XIA Zhe ZHANG Xin LIU Yang-yang JIA Zi-fang ZHAO Hai-hong LI Cheng-qi WANG Qing-lian College of Life Sciences Henan Normal University Key Discipline Open Lab on crop Molecular breeding of Henan institute of Higher Learning/Cotton Research institute Henan Institute of Science and Technology

Segregation analysis of the mixed genetic model of major gene plus polygene was used to identify the major genes for cotton yield-related traits using six generations P1, P2, F1, B1, B2, and F2 generated from the cross of Baimian 1 x TM-1. In addition to boll size and seed index, the major genes for the other five traits were detected： one each for seed yield, lint percentage, boll number, lint index; and two for lint yield. Quantitative trait locus/loci （QTL） mapping was performed in the F2 and F2：3 populations of above cross through molecular marker technology, and a total of 50 QTL （26 suggestive and 24 significant） for yield-related traits were detected. Four common QTL were discovered： qLP-3b（F2）/qLP-3（F2：3） and qLP-19b （F2）/qLP-19（F2：3） for lint percentage, qBN-17（F2）/qBN-17（F2：3） for boll number, and qBS-26b（F2）/qBS-26（F2：3） for boll size. Especially, qLP- 3b（Fz）/qLP-3（F2：3）, not only had LOD scores 〉3 but also exceeded the permutation threshold （5.13 and 5.29, respectively）, correspondingly explaining 23.47 and 29.55% of phenotypic variation. This QTL should be considered preferentially in marker assisted selection （MAS）. Segregation analysis and QTL mapping could mutually complement and verify, which provides a theoretical basis for genetic improvement of cotton yield-related traits by using major genes （QTL）.

关键词： major gene segregation analysis QTL mapping yield-related traits upland cotton

Seasonal dynamics of foliar δ^(13)C and nutrient concentration of Chinese chastetree and spine jujube in foothill rock outcrop habitat of the southern Taihang Mountains, Central China

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Journal of Forestry Research 2019年第1期30卷 45-56页

作者： Chunxia He Jinsong Zhang Ping Meng Jun Gao Key Laboratory of Tree breeding and cultivation of State Forestry Administration Research Institute of ForestryChinese Academy of Forestry Co-Innovation Center for Sustainable Forestry in Southern China Nanjing Forestry University

In this study, in situ investigation was conducted on Chinese chastetree(Vitex negundo var. heterophylla)and spine jujube(Ziziphus jujuba var. spinosa) during early, developed, and closing succession stages. Monthly data were recorded for foliar δ^(13)C values and foliar N, P,and K concentrations from May to October. Foliar δ^(13)C values declined with time and differences by succession stage varied by species. Older spine jujube displayed higher foliar N concentration while foliar P concentration was inversely related with N. Chinese chastetree had lower foliar K concentration than spine jujube. Foliar C/N ratio declined during the dry season and increased in the wet season. Foliar N/P ratio increased during the dry season and declined to its initial level until October, when it increased again. Foliar δ^(13)C value was positively correlated with foliar N concentration. Foliar P and K concentrations were positively correlated to each other. In conclusion, the two shrubs had contrasting strategies of water use efficiency during their succession, but water use efficiency of both species was promoted by N availability and limited by P availability.

关键词： Global climatic change Agroforestry Natural regeneration Deciduous plant Arid land

Vital contribution of brassinosteroids to hypoxia-stimulated coleoptile elongation in submerged rice

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The crop Journal 2024年第5期12卷 1379-1390页

作者： Binbin Sun Wenjing Meng Wenchao Yin Mei Niu Dapu Liu Jihong Liu Xiaoxing Zhang Nana Dong Yanzhao Yang Xicheng Li Simeng Geng Haiyan Zhang Hongning Tong College of Agriculture Qingdao Agricultural UniversityQingdao 266109ShandongChina State Key Laboratory of crop Gene Resources and breeding Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China

The rapid elongation of rice(Oryza sativa)coleoptile is pivotal for the plant plumule to evade hypoxia stress induced by submergence,a condition often arising from overirrigation,ponding,rainstorms,or *** brassinosteroids(BRs)are recognized for their diverse roles in plant growth and development,their influence on coleoptile elongation under hypoxic conditions remains largely *** this study,we demonstrate the significant requirement of BRs for coleoptile elongation in deep *** coleoptile development,Glycogen Synthase Kinase3-Like Kinase2(GSK2),the central inhibitor of BR signaling in rice,undergoes substantial suppression in deep water but induction in *** contrast,the dephosphorylated form of BRASSINAZOLE RESISTANT1(OsBZR1),representing the active form of the key BR signaling transcription factor,is induced in water but suppressed in ***,the knockout of GSK3-like kinase genes significantly enhances coleoptile elongation in deep water,strongly indicating a vital contribution of BR response to hypoxia-stimulated coleoptile *** analysis uncovers both BR-associated and BR-independent hypoxia responses,implicating substance metabolism,redox reactions,abiotic stress responses,and crosstalk with other hormones in the regulation of BR-induced hypoxia *** summary,our findings suggest that rice plumules rapidly elongate coleoptiles through the activation of BR response in deep water,enabling them to escape from submergence-induced hypoxia stress.

关键词： Brassinosteroid Coleoptile elongation Hypoxia stress Submergence Rice

OsPRMT6a-mediated arginine methylation of OsJAZ1 regulates jasmonate signaling and spikelet development in rice

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Molecular Plant 2024年第6期17卷 900-919页

作者： Kun Dong Fuqing Wu Siqi Cheng Shuai Li Feng Zhang Xinxin Xing Xin Jin Sheng Luo Miao Feng Rong Miao Yanqi Chang Shuang Zhang Xiaoman You Peiran Wang Xin Zhang Cailin Lei Yulong Ren Shanshan Zhu Xiuping Guo Chuanyin Wu Dong-Lei Yang Qibing Lin Zhijun Cheng Jianmin Wan State Key Laboratory of crop Gene Resources and breeding National Key Facility for Crop Gene Resources and Genetic ImprovementInstitute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China State Key Laboratory for crop Genetics and Germplasm Enhancement Nanjing Agricultural UniversityNanjing 210095China

Although both protein arginine methylation(PRMT)and jasmonate(JA)signaling are crucial for regulating plant development,the relationship between these processes in the control of spikelet development remains *** this study,we used the CRISPR/Cas9 technology to generate two OsPRMT6a loss-of-function mutants that exhibit various abnormal spikelet ***,we found that OsPRMT6a can methylate arginine residues in JA signal repressors OsJAZ1 and *** showed that arginine methylation of OsJAZ1 enhances the binding affinity of OsJAZ1 with the JA receptors OsCOI1a and OsCOI1b in the presence of JAs,thereby promoting the ubiquitination of OsJAZ1 by the SCF^(OsCOI1a/OsCOI1b) complex and degradation via the 26S *** process ultimately releases OsMYC2,a core transcriptional regulator in the JA signaling pathway,to activate or repress JA-responsive genes,thereby maintaining normal plant(spikelet)***,in the osprmt6a-1 mutant,reduced arginine methylation of OsJAZ1 impaires the interaction between OsJAZ1 and OsCOI1a/OsCOI1b in the presence of *** a result,OsJAZ1 proteins become more stable,repressing JA responses,thus causing the formation of abnormal spikelet ***,we discovered that JA signaling reduces the OsPRMT6a mRNA level in an OsMYC2-dependent manner,thereby establishing a negative feedback loop to balance JA *** further found that OsPRMT6a-mediated arginine methylation of OsJAZ1 likely serves as a switch to tune JA signaling to maintain normal spikelet development under harsh environmental conditions such as high ***,our study establishes a direct molecular link between arginine methylation and JA signaling in rice.

关键词： protein arginine methylation jasmonate signaling negative feedback loop spikelet development adaptation to heat stress rice