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Increasing root-lower characteristics improves drought tolerance in cotton cultivars at the seedling stage

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Journal of Integrative Agriculture 2024年第7期23卷 2242-2254页

作者： Congcong Guo Hongchun Sun Xiaoyuan Bao Lingxiao Zhu Yongjiang Zhang Ke Zhang Anchang Li Zhiying Bai Liantao Liu Cundong Li State key laboratory of North China crop improvement and Regulation/key laboratory of crop Growth Regulation of Hebei Province/College of Agronomy Hebei Agricultural UniversityBaoding 071001China

Drought is an important abiotic stress factor in cotton *** root system architecture(RSA)of cotton shows high plasticity which can alleviate drought-related stress under drought stress(DS)conditions;however,this alleviation is cultivar ***,this study estimated the genetic variability of RSA in cotton under *** the paper-based growth system,we assessed the RSA variability in 80 cotton cultivars at the seedling stage,with 0 and10%polyethylene glycol 6000(PEG6000)as the control(CK)and DS treatment,*** analysis of 23 aboveground and root traits in the 80 cotton cultivars revealed different responses to *** the 10th day after DS treatment,the degree of variation in the RSA traits under DS(5–55%)was greater than that of CK(5–49%).The 80 cultivars were divided into drought-tolerant cultivars(group 1),intermediate drought-tolerant cultivars(group 2),and drought-sensitive cultivars(group 3)based on their comprehensive evaluation values of drought *** DS,the root lengthlower,root area-lower,root volume-lower,and root length density-lower were significantly reduced by 63,71,76,and 4%in the drought-sensitive cultivars compared to ***,the drought-tolerant cultivars maintained their root lengthlower,root area-lower,root volume-lower,and root length density–lower *** to CK,the root diameter(0–2 mm)-lower increased by 21%in group 1 but decreased by 3 and 64%in groups 2 and 3,respectively,under ***,the drought-tolerant cultivars displayed a plastic response under DS that was characterized by an increase in the root-lower *** resistance was positively correlated with the root area-lower and root length ***,the RSA of the different cotton cultivars varied greatly under ***,important root traits,such as the root-lower traits,provide great insights for exploring whether drought-tolerant cotton cultivars can effectively withstand adverse environment

关键词： cotton root system architecture drought stress cultivars variability root-lower

Identification of new cotton fiber-quality QTL by multiple genomic analyses and development of markers for genomic breeding

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The crop Journal 2024年第3期12卷 866-879页

作者： Haozhe Tan Binghui Tang Mengling Sun Qiulu Yin Yizan Ma Jianying Li Pengcheng Wang Zhonghua Li Guannan Zhao Maojun Wang Xianlong Zhang Chunyuan You Lili Tu National key laboratory of crop genetic improvement Hubei Hongshan LaboratoryHuazhong Agricultural UniversityWuhan 430070HubeiChina Cotton Research Institute Shihezi Academy of Agriculture ScienceShihezi 832000XinjiangChina

Cotton fiber is one of the main raw materials for the textile *** recent years,many cotton fiber quality QTL have been identified,but few were applied in *** this study,a genome wide association study(GWAS)of fiber-quality traits in 265 upland cotton breeding intermediate lines(GhBreeding),combined with genome-wide selective sweep analysis(GSSA)and genomic selection(GS),revealed 25 *** of these QTL were ignored by only using *** CRISPR/Cas9 mutants of GhMYB_D13 had shorter fiber,which indicates the credibility of QTL to a certain *** these QTL were verified in other cotton natural populations,5 stable QTL were found having broad potential for application in ***,among these 5 stable QTL,superior genotypes of 4 showed an enrichment in most improved new varieties widely cultivated *** findings provide insights for how to identify more QTL through combined multiple genomic analysis to apply in breeding.

关键词： Cotton fiber quality breeding GWAS Genome-wide selective sweep analysis Genomic selection InDel markers

Fine mapping and characterization of a major QTL for grain length,***-2D.1,that has pleiotropic effects in synthetic allohexaploid wheat

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Journal of Integrative Agriculture 2024年第9期23卷 2911-2922页

作者： Mingming Wang Jia Geng Zhe Zhang Zihan Zhang Lingfeng Miao Tian Ma Jiewen Xing Baoyun Li Qixin Sun Yufeng Zhang Zhongfu Ni Frontiers Science Center for Molecular Design Breeding/key laboratory of crop Heterosis and Utilization Ministry of Education/Beijing Key Laboratory of Crop Genetic ImprovementChina Agricultural UniversityBeijing 100193China National Plant Gene Research Centre Beijing 100193China

Grain size is one of the determinants of grain yield,and identifying the genetic loci that control grain size will be helpful for increasing grain *** our previous study,a quantitative trait locus(QTL)for grain length(GL),***-2D.1,was identified from an F2 population developed from the cross between the natural(TAA10)and synthetic(XX329)allohexaploid *** the present study,we mainly fine mapped and validated its genetic *** this end,multiple near-isogenic lines(NILs)were obtained through marker-assisted selection with TAA10 as the recurrent *** secondary populations derived from 25 heterozygous recombinants were used for fine mapping of ***-2D.1,and the allele from XX329 significantly increased GL,thousand-grain weight(TGW),total spikelet number per spike(TSN)and spike compactness(SC).Using NILs for XX329(2D+)and TAA10(2D−),we determined the genetic and pleiotropic effects of *** target sequences were aligned with the wheat reference genome RefSeq v2.1 and spanned an~0.9 Mb genomic ***2D03G0114900(ortholog of Os03g0594700)was predicted as the candidate gene based on whole-genome re-sequencing and expression *** summary,the map-based cloning of ***-2D.1 will be useful for improving grain weight with enhanced GL and TSN.

关键词： grain length total spikelet number per spike spike compactness near-isogenic lines QTL wheat

***2 regulates plant height by affecting the main inflorescence length and first effective branch height in Brassica napus L.

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The crop Journal 2024年第4期12卷 1102-1111页

作者： Chengke Pang Jun Yu Liang Zhang Min Tang Hongfang Liu Ying Cai Feng Chen Jiefu Zhang Wei Hua Xiaodong Wang Ming Zheng Oil crops Research Institute of the Chinese Academy of Agricultural Sciences Key Laboratory of Biology and Genetic Improvement of Oil CropsMinistry of Agriculture and Rural AffairsWuhan 430062HubeiChina key laboratory of Cotton and Rapeseed Ministry of Agriculture and Rural AffairsKey Laboratory of Jiangsu Province for AgrobiologyInstitute of Industrial CropsJiangsu Academy of Agricultural SciencesNanjing 210014JiangsuChina National key laboratory of crop genetic improvement Huazhong Agricultural UniversityWuhan 430070HubeiChina

Rapeseed(Brassica napus L.)is one of the main oil crops in the world,and increasing its yield is of great significance for ensuring the safety of edible ***,improving rapeseed plant architecture is an effective way to increase rapeseed yield with higher planting ***,the regulatory mechanism of rapeseed plant architecture is poorly *** this study,a dwarf rapeseed mutant dwarf08(df08)is obtained by ethyl methane sulfonate(EMS)-*** decrease in plant height of df08 is mainly caused by the reduction in main inflorescence length and first effective branch height and controlled by a single semi-dominant *** hybrid plants(F1)show a semi-dwarf *** map-based cloning and transgenic assay,we confirm that the nonsynonymous single nucleotide variant(SNV)(C to T)in ***2,which is homologous with Arabidopsis(Arabidopsis thaliana)BIN2,is responsible for the dwarfism of ***2 interacts with BnaBZR1/BES1 and involves in brassinosteroids(BRs)signal *** to Leucine substitution in 284(P284L)enhances the protein stability of ***2-D,disrupts BRs signal transduction and affects the expression of genes regulating cell division,leading to dwarfism of *** study provides a new insight for the mechanism of rapeseed plant height regulation and creates an elite germplasm that can be used for genetic improvement of rapeseed architecture.

关键词： Brassica napus Plant height Brassinosteroids BIN2

Overcoming genotypic dependency and bypassing immature embryos in wheat transformation by using morphogenic regulators

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Science China(Life Sciences) 2024年第7期67卷 1535-1538页

作者： Ziru Zhou Yawen Yang Guo Ai Miaomiao Zhao Baozhu Han Chunjie Zhao Yiqian Chen Yuwei Zhang Hong Pan Caixia Lan Chao He Qiang Li Jieting Xu Wenhao Yan National key laboratory of crop genetic improvement Hubei Hongshan LaboratoryHuazhong Agricultural UniversityWuhan 430070China WIMI Biotechnology Co. Ltd.Changzhou 213025China

Dear Editor,Agrobacterium-mediated transformation technology is of vital importance for functional genomics studies and precision breeding in crops due to low cost and clear genetic manifestation.A morphogenic gene pa... 详细信息

关键词： breeding crops transformation

Genomic insights into the origin and evolution of spelt(Triticum spelta L.)as a valuable gene pool for modern wheat breeding

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Plant Communications 2024年第5期5卷 75-90页

作者： Yongfa Wang Zihao Wang Yongming Chen Tianyu Lan Xiaobo Wang Gang Liu Mingming Xin Zhaorong Hu Yingyin Yao Zhongfu Ni Qixin Sun Weilong Guo Huiru Peng Frontiers Science Center for Molecular Design Breeding Key Laboratory of Crop Heterosis and UtilizationBeijing Key Laboratory of Crop Genetic ImprovementChina Agricultural UniversityBeijing 100193China Institute for Plant genetics Heinrich Heine University40225 DusseldorfGermany Sanya Institute of China Agricultural University Sanya 572025China

Spelt(Triticum aestivum ***)is an important wheat subspecies mainly cultivated in Europe before the 20th century that has contributed to modern wheat breeding as a valuable genetic ***,relatively little is known about the origins and maintenance of spelt ***,using resequencing data from 416 worldwide wheat accessions,including representative spelt wheat,we demonstrate that Eu-ropean spelt emerged when primitive hexaploid wheat spread to the west and hybridized with pre-settled domesticated emmer,the putative maternal *** introgression regions from domesticated emmer confer spelt’s primitive morphological characters used for species taxonomy,such as tenacious glumes and laterﬂ*** propose a haplotype-based"spelt index"to identify spelt-type wheat vari-eties and to quantify utilization of the spelt gene pool in modern wheat *** study reveals the ge-netic basis for the establishment of the spelt wheat subspecies in a specific ecological niche and the vital role of the spelt gene pool as a unique germplasm resource in modern wheat breeding.

关键词： wheat spelt interspecific hybridization gene pool modern wheat breeding

OsEIL1 and OsEIL2,two master regulators of rice ethylene signaling,promote the expression of ROS scavenging genes to facilitate coleoptile elongation and seedling emergence from soil

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Plant Communications 2024年第3期5卷 93-105页

作者： Jinzhu Qiao Ruidang Quan Juan Wang Yuxiang Li Dinglin Xiao Zihan Zhao Rongfeng Huang Hua Qin Biotechnology Research Institute Chinese Academy of Agricultural SciencesBeijing 100081China National key Facility of crop Gene Resources and genetic improvement Beijing 100081China

Successful emergence from the soil is a prerequisite for survival of germinating seeds in their natural *** rice,coleoptile elongation facilitates seedling emergence and establishment,and ethylene plays an important role in this ***,the underlying regulatory mechanism remains largely ***,we report that ethylene promotes cell elongation and inhibits cell expansion in rice coleoptiles,result-ing in longer and thinner coleoptiles that facilitate seedlings emergence from the *** analysis showed that genes related to reactive oxygen species(ROS)generation are upregulated and genes involved in ROS scavenging are downregulated in the coleoptiles of ethylene-signaling *** investiga-tions showed that soil coverage promotes accumulation of ETHYLENE INSENSITIVE 3-LIKE 1(OsEIL1)and OsEIL2 in the upper region of the coleoptile,and both OsEIL1 and OsEIL2 can bind directly to the promoters of the GDP-mannose pyrophosphorylase(VTC1)gene OsVTC1-3 and the peroxidase(PRX)genes OsPRX37,OsPRX81,OsPRX82,and OsPRX88 to activate their *** leads to increased ascorbic acid content,greater peroxidase activity,and decreased ROS accumulation in the upper region of the *** of ROS accumulation promotes coleoptile growth and seedling emergence from *** deepen our understanding of the roles of ethylene and ROS in controlling coleoptile growth,and this information can be used by breeders to produce rice varieties suitable for direct seeding.

关键词： ethylene ROS coleoptile growth emergence rate rice

The ABA synthesis enzyme allele OsNCED2^(T)promotes dryland adaptation in upland rice

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The crop Journal 2024年第1期12卷 68-78页

作者： Liyu Huang Yachong Bao Shiwen Qin Min Ning Qinyan Li Qingmao Li Shilai Zhang Guangfu Huang Jing Zhang Wensheng Wang Binying Fu Fengyi Hu key laboratory of Biology and Germplasm Innovation of Perennial Rice from Ministry of Agriculture and Rural Affairs School of AgricultureYunnan UniversityKunming 650091YunnanChina National key Facility for crop Gene Resources and genetic improvement Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China

Upland rice shows dryland adaptation in the form of a deeper and denser root system and greater drought resistance than its counterpart,irrigated *** previous study revealed a difference in the frequency of the OsNCED2 gene between upland and irrigated populations.A nonsynonymous mutation(C to T,from irrigated to upland rice)may have led to functional variation fixed by artificial selection,but the exact biological function in dryland adaptation is *** this study,transgenic and association analysis indicated that the domesticated fixed mutation caused functional variation in OsNCED2,increasing ABA levels,root development,and drought tolerance in upland rice under dryland ***2-overexpressing rice showed increased reactive oxygen species-scavenging abilities and transcription levels of many genes functioning in stress response and development that may regulate root development and drought ***2^(T)-NILs showed a denser root system and drought resistance,promoting the yield of rice under dryland ***2^(T)may confer dryland adaptation in upland rice and may find use in breeding dryland-adapted,water-saving rice.

关键词： Upland rice Dryland adaptation ABA Root development Drought tolerance

Post-transcriptional regulation of grain weight and shape by the RBP-A-J-K complex in rice

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Journal of Integrative Plant Biology 2024年第1期66卷 66-85页

作者： Ding Ren Hui Liu Xuejun Sun Fan Zhang Ling Jiang Ying Wang Ning Jiang Peiwen Yan Jinhao Cui Jinshui Yang Zhikang Li Pingli Lu Xiaojin Luo State key laboratory of genetic Engineering and MOE Engineering Research Center of Gene Technology School of Life SciencesFudan UniversityShanghai 200438China State key laboratory of crop Stress Adaptation and improvement School of Life SciencesHenan UniversityKaifeng 475004China MOE key laboratory of crop Physiology Ecology and Genetic Breeding College of AgronomyJiangxi Agricultural UniversityNanchang 330045China State key laboratory of crop Gene Resources and Breeding Institute of Crop SciencesChinese Academy of Agricultural Sciences(CAAS)Beijing 100081China College of Agronomy Anhui Agricultural UniversityHefei 230036China

RNA-binding proteins(RBPs)are components of the post-transcriptional regulatory system,but their regulatory effects on complex traits remain *** an integrated strategy involving map-based cloning,functional characterizations,and transcriptomic and population genomic analyses,we revealed that RBP-K(LOC_Os08g23120),RBP-A(LOC_Os11g41890),and RBP-J(LOC_Os10g33230)encode proteins that form an RBP-A-J-K complex that negatively regulates rice yield-related *** of the RBP-A-J-K complex indicated RBP-K functions as a relatively non-specific RBP chaperone that enables RBP-A and RBP-J to function ***,RBP-J most likely affects GA pathways,resulting in considerable increases in grain and panicle lengths,but decreases in grain width and *** contrast,RBP-A negatively regulates the expression of genes most likely involved in auxin-regulated pathways controlling cell wall elongation and carbohydrate transport,with substantial effects on the rice grain filling process as well as grain length and ***,RBP-K is relatively ancient and highly conserved,whereas RBP-J and RBP-A are more ***,the RBP-A-J-K complex may represent a typical functional model for many RBPs and protein complexes that function at transcriptional and post-transcriptional levels in plants and animals for increased functional consistency,efficiency,and versatility,as well as increased evolutionary *** results clearly demonstrate the importance of RBP-mediated post-transcriptional regulation for the diversity of complex ***,rice grain yield and quality may be enhanced by introducing various complete or partial loss-of-function mutations to specific RBP genes using clustered regularly interspaced palindromic repeats(CRISPR)/CRISPR-associated protein 9 technology and by exploiting desirable natural tri-genic allelic combinations at the loci encoding the components of the RBP-A-J-K complex through marker-assisted select

关键词： GL11 grain weight and shape post-transcriptional regulation RNA-binding proteins