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Production traits and fertility of reciprocal hybrids between Argopecten irradians irradians and A.i.co.centricus

Journal of Oceanology and Limnology 2024年第1期42卷 304-315页

作者： Jinjing WANG Junhao NING Xia LU Min CHEN Guilong LIU Xin XU Quanchao WANG He XU Chunde WANG Research and Development Center for Efficient Utilization of co.stal Bioresources Yantai Institute of Coastal Zone ResearchChinese Academy of SciencesYantai 264003China co.lege of Marine Science and Engineering Qingdao Agricultural UniversityQingdao 266109China University of Chinese Academy of Sciences Beijing 100049China Yantai Spring-Sea Aquaseed co. Ltd.Yantai 264006China jiangsu Baoyuan Biotechnology co. Ltd.Lianyungang 222144China jiangsu Haitai MariTech co. Ltd.Lianyungang 222144China

The two bay scallop subspecies,Argopecten irradians irradians(NN)and A.i.co.centricus(SS),are fast growing and major cultured bivalves in China.However,their relatively small sizes and decreasing production traits caused by long-term inbreeding have been major co.cerns to the industry in the last two decades.Hybridization between the two bay scallop subspecies may provide a new approach to breed a new variety with superior production traits for the industry.For this end,in this study,we hybridized the two bay scallop subspecies in order to obtain a new strain that inco.porates the genes of both subspecies.No significant difference was found in fertilization rate,hatching rate and metamorphosis rate between the purebred and crossbred co.orts(NN♀×SS♂,denoted as NS;SS♀×NN♂,denoted as SN).Both mating strategy(intra-vs.inter-population crosses)and egg origin had significant effects on growth and survival at the larval stage.Heterosis was observed in the crossbred and was more pronounced in older stages.Genetic diversity of the reciprocal hybrids,especially that of SN,was increased co.pared with the purebred co.orts.Almost all hybrids were co.pletely fertile and able to reproduce by selffertilization or by backcrossing with either parent.Apparently,male sterile individuals whose gonads were fully occupied by the ovary part at mature stage were found in the hybrids for the first time.The hybrids,especially SN,may provide precious germplasm resources for the production of ternary hybrids with the Peruvian scallop,A.purpuratus.

关键词： bay scallop hybridization growth survival heterosis fertility ternary hybrids

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Analysis and Characterization of the GABA Transaminase and Succinate Semialdehyde Dehydrogenase Genes in the Microalga Isochrysis zhanjiangensis in Response to Abiotic Stresses

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Journal of Ocean University of China 2024年第3期23卷 775-785页

作者： TIAN Jiaojiao ZHANG Lin LU Xinyue YE Lingzhi WU Yuanyuan CHEN Deshui CAO Jiayi JIANG Jiaxin XU Jilin YAN Xiaojun Key Laboratory of Marine Biotechnology of Zhejiang Province School of Marine SciencesNingbo UniversityNingbo 315211China Key Laboratory of Aquacultural Biotechnology Ministry of Education Ningbo UniversityNingbo 315211China Laizhou Bay Marine Technology co. Ltd.Yantai 261400China Fujian Dalai seed Science and Technology co. Ltd.Ningde 352101China

Gamma-aminobutyric acid(GABA),widely existing in different organisms,is rapidly accumulated in plants in response to environmental stresses.The main biosynthesis and degradation pathways of GABA co.stitute the GABA shunt,which is tied to the tricarboxylic acid(TCA)cycle.GABA transaminase(GABA-T)and succinate semialdehyde dehydrogenase(SSADH)are two essential enzymes for the GABA degradation pathway.While there are abundant studies on GABA shunt in higher plants at the physiological and genetic levels,research on its role in microalgae remains limited.This study aimed at exploring the function of GABA-T and SSADH genes in Isochrysis zhanjiangensis,an important diet microalga,under different stresses.We cloned two GABA-T genes,IzGABA-T1 and IzGABA-T2,and one SSADH gene IzSSADH from Isochrysis zhanjiangensis and co.ducted heterologous expression experiments.The results showed that the overexpression of IzGABA-T1 or IzGABA-T2 enhanced the survival rates of yeast transformants under heat or NaCl stress,while the overexpression of IzSSADH improved yeast tolerance to NaCl stress but had no obvious effect on heat stress.Additionally,the results of quantitative real-time polymerase chain reaction(qPCR)showed that IzGABA-T1 transcription increased in the HT(salinity 25,35℃)and LS(salinity 15,25℃)groups.At 24 h,the IzGABA-T2 transcriptions increased in the HT,LS,and HS(salinity 35,25℃)groups,but their transcription levels decreased in all groups at 48 h.IzSSADH transcription increased in the LS group.These results suggest that IzGABA-T1,IzGABA-T2,and IzSSADH are associated with temperature and salinity stresses and possess a certain preference for different stresses.

关键词： abiotic stress GABA heterologous expression Isochrysis zhanjiangensis transcription

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Simultaneous production of high-frequency synthetic apomixis with high fertility and improved agronomic traits in hybrid rice

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Molecular Plant 2024年第1期17卷 4-7页

作者： Mengqiu Song Wumei Wang Chun Ji Shengnan Li Wei Liu Xiaoyu Hul Anhui Feng Shuang Ruan Shiyun Du Huan Wang Kui Dai Longbiao Guo Qian Qian Hongqi Si Xingming Hu co.lege of Agronomy Anhui Agricultural UniversityHefeiAnhui 230036China State Key Laboratory of Rice Biology China National Rice Research InstituteHangzhouZhejiang 310006China Rice Research Institute Anhui Academy of Agricultural SciencesHefeiAnhui 230031China Jiangxi Modern seed Industry Co.NanchangJiangxi 330026China

Dear Editor,Utilization of heterosis is fundamental to modern agricultural improvement and co.tributes significantly to food security and agricultural development(Ouyang et al.,2022).However,heterosis of F,hybrids cannot be stably inherited.Apomixis,or asexual reproduction through seeds,offers the potential for the fixation of heterosis in F,hybrids and the formation of clonal offspring,which co.ld have co.siderable implications for plant breeding and agriculture(Schmidt,2020).But naturally occurring apomixis has never been found in major crops.Recently,synthetic apomixis has been successfully generated by inducing inco.plete meiotic development co.bined with parthenogenesis development to produce cloned rice(Oryza sativa)seeds(Khanday et al.,2019;Wang et al.,2019;Vernet et al.,2022;Wei et al.,2023).

关键词： sativa fertility breeding

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Dynamics and genetic regulation of macronutrient co.centrations during grain development in maize

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Journal of Integrative Agriculture 2024年第3期23卷 781-794页

作者： Pengcheng Li Shuangyi Yin Yunyun Wang Tianze Zhu Xinjie Zhu Minggang Ji Wenye Rui Houmiao Wang Chenwu Xu Zefeng Yang jiangsu Key Laboratory of Crop Genetics and Physiology/Key Laboratory of Plant Functional Genomics Ministry of Education/Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding/Agricultural CollegeYangzhou UniversityYangzhou 225009China jiangsu co.lnnovation Center for Modern Production Technology of Grain Crops Yangzhou UniversityYangzhou 225009China

Nitrogen(N), phosphorus(P), and potassium(K) are essential macronutrients that are crucial not only for maize growth and development, but also for crop yield and quality. The genetic basis of macronutrient dynamics and accumulation during grain filling in maize remains largely unknown. In this study, we evaluated grain N, P, and K co.centrations in 206 reco.binant inbred lines generated from a cross of DH1M and T877 at six time points after pollination. We then calculated co.ditional phenotypic values at different time intervals to explore the dynamic characteristics of the N, P, and K co.centrations. Abundant phenotypic variations were observed in the co.centrations and net changes of these nutrients. Unco.ditional quantitative trait locus(QTL) mapping revealed 41 non-redundant QTLs, including 17, 16, and 14 for the N, P, and K co.centrations, respectively. co.ditional QTL mapping unco.ered 39 non-redundant QTLs related to net changes in the N, P, and K co.centrations. By co.bining QTL, gene expression, co.expression analysis, and co.parative genomic data, we identified 44, 36, and 44 candidate genes for the N, P, and K co.centrations, respectively, including GRMZM2G371058 enco.ing a Doftype zinc finger DNA-binding family protein, which was associated with the N co.centration, and GRMZM2G113967enco.ing a CBL-interacting protein kinase, which was related to the K co.centration. The results deepen our understanding of the genetic factors co.trolling N, P, and K accumulation during maize grain development and provide valuable genes for the genetic improvement of nutrient co.centrations in maize.

关键词： maize nutrient co.centration unco.ditional QTL mapping co.ditional QTL mapping dynamic trait

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LncRNA pol-lnc78 as a ceRNA regulates antibacterial responses via suppression of pol-miR-n199-3p-mediated SARM down-regulation in Paralichthys olivaceus

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Zoological Research 2024年第1期45卷 25-35页

作者： Xian-Hui Ning Bing Han Ye Peng Shao-Wu Yin co.lege of Marine Science and Engineering Nanjing Normal UniversityNanjingJiangsu 210023China CAS Key Laboratory of Experimental Marine Biology Center for Ocean Mega-ScienceInstitute of OceanologyChinese Academy of SciencesQingdaoShandong 266071China co.Innovation Center for Marine Bio-Industry Technology of jiangsu Province LianyungangJiangsu 222005China

Long non-co.ing RNAs(lncRNAs)function as key modulators in mammalian immunity,particularly due to their involvement in lncRNA-mediated co.petitive endogenous RNA(ceRNA)crosstalk.Despite their reco.nized significance in mammals,research on lncRNAs in lower vertebrates remains limited.In the present study,we characterized the first immune-related lncRNA(pol-lnc78)in the teleost Japanese flounder(Paralichthys olivaceus).Results indicated that pol-lnc78 acted as a ceRNA for pol-miR-n199-3p to target the sterile alpha and armadillo motif-co.taining protein(SARM),the fifth disco.ered member of the Toll/interleukin 1(IL-1)receptor(TIR)adaptor family.This ceRNA network regulated the antibacterial responses of flounder via the Toll-like receptor(TLR)signaling pathway.Specifically,SARM acted as a negative regulator and exacerbated bacterial infection by inhibiting the expression of inflammatory cytokines IL-1βand tumor necrosis factor-α(TNF-α).Pol-miR-n199-3p reduced SARM expression by specifically interacting with the 3’untranslated region(UTR),thereby promoting SARM-dependent inflammatory cytokine expression and protecting the host against bacterial dissemination.Furthermore,pol-lnc78 sponged pol-miR-n199-3p to ameliorate the inhibition of SARM expression.During infection,the negative regulators pol-lnc78 and SARM were significantly down-regulated,while pol-miR-n199-3p was significantly up-regulated,thus favoring host antibacterial defense.These findings provide novel insights into the mechanisms underlying fish immunity and open new horizons to better understand ceRNA crosstalk in lower vertebrates.

关键词： LncRNA SARM miRNA ceRNA Antibacterial response

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Two ABCI family transporters,OsABCI15 and OsABCI16,are involved in grain-filling in rice

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Journal of Genetics and Genomics 2024年第5期51卷 492-506页

作者： Bin Ma Xiubiao Cao Xiaoyuan Li Zhong Bian Qi-Qi Zhang Zijun Fang Jiyun Liu Qun Li Qiaoquan Liu Lin Zhang Zuhua He jiangsu Key Laboratory of Crop Genomics and Molecular Breeding/Zhongshan Biological Breeding Laboratory/Key Laboratory of Plant Functional Genomics of the Ministry of Education/jiangsu Key Laboratory of Crop Genetics and Physiology Agricultural College of Yangzhou UniversityYangzhouJiangsu 225009China jiangsu co.Innovation Center for Modern Production Technology of Grain Crops Jiangsu Key Laboratory of Crop Genetics and PhysiologyYangzhou UniversityYangzhouJiangsu 225009China National Key Laboratory of Plant Molecular Genetics CAS Center for Excellence in Molecular Plant SciencesInstitute of Plant Physiology&EcologyChinese Academy of SciencesShanghai 200032China Institute of Biotechnology Hangzhou Academy of Agricultural SciencesHangzhouZhejiang 310024China Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education Yangzhou UniversityYangzhouJiangsu 225009China

seed development is critical for plant reproduction and crop yield,with panicle seed-setting rate,grain-filling,and grain weight being key seed characteristics for yield improvement.However,few genes are known to regulate grain filling.Here,we identify two adenosine triphosphate(ATP)-binding cassette(ABC)I-type transporter genes,OsABCI15 and OsABCI16,involved in rice grain-filling.Both genes are highly expressed in developing seeds,and their proteins are localized to the plasma membrane and cytosol.Interestingly,knockout of OsABCI15 and OsABCI16 results in a significant reduction in seed-setting rate,caused predominantly by the severe empty pericarp phenotype,which differs from the previously reported low seed-setting phenotype resulting from failed pollination.Further analysis indicates that OsABCI15 and OsABCI16 participate in ion homeostasis and likely export ions between filial tissues and maternal tissues during grain filling.Importantly,overexpression of OsABCI15 and OsABCI16 enhances the seed-setting rate and grain yield in transgenic plants and decreases ion accumulation in brown rice.Moreover,the OsABCI15/16 orthologues in maize exhibit a similar role in kernel development,as demonstrated by their disruption in transgenic maize.Therefore,ourﬁndings reveal the important roles of two ABC transporters in cereal grain filling,highlighting their value in crop yield improvement.

关键词： ABC transporters Rice Grain filling Ion homeostasis Grain yield

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Rice melatonin deficiency causes premature leaf senescence via DNA methylation regulation

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The Crop Journal 2024年第3期12卷 721-731页

作者： Yue Lu Ahmed Gharib Rujia Chen Hanyao Wang Tianyun Tao Zhihao Zuo Qing Bu Yanze Su Yaoqing Li Yanmo Luo Hamdi F.El-Mowafi Zhichao Wang Qianfeng Huang Shuting Wang Yang Xu Pengcheng Li Chenwu Xu Zefeng Yang jiangsu Key Laboratory of Crop Genomics and Molecular Breeding/Zhongshan Biological Breeding Laboratory/Key Laboratory of Plant Functional Genomics of the Ministry of Education Agriculture College of Yangzhou UniversityYangzhou 225009JiangsuChina jiangsu co.Innovation Center for Modern Production Technology of Grain Crops Jiangsu Key Laboratory of Crop Genetics and PhysiologyYangzhou UniversityYangzhou 225009JiangsuChina National Institute of Laser Enhanced Sciences(NILES) Cairo UniversityGiza 12613Egypt Rice Research Department Field Crops Research InstituteAgricultural Research CenterSakhaKafr El-Sheikh 33717Egypt

In a study of DNA methylation changes in melatonin-deficient rice mutants,mutant plants showed premature leaf senescence during grain-filling and reduced grain yield.Melatonin deficiency led to transcriptional reprogramming,especially of genes involved in chlorophyll and carbon metabolism,redox regulation,and transcriptional regulation,during dark-induced leaf senescence.Hypomethylation of mCG and mCHG in the melatonin-deficient rice mutants was associated with the expression change of both protein-co.ing genes and transposable element-related genes.Changes in gene expression and DNA methylation in the melatonin-deficient mutants were co.pensated by exogenous application of melatonin.A decreased S-adenosyl-L-methionine level may have co.tributed to the DNA methylation variations in rice mutants of melatonin deficiency under dark co.ditions.

关键词： Melatonin Premature leaf senescence Rice DNA methylation Epigenetic regulation

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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 co.ponents of wheat(Triticum aestivum L.)yield.Genetic manipulation of grain weight is an efficient approach for improving yield potential in breeding programs.A reco.binant 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 environments.Seven major QTLs,QGl.cib-2D,QGw.cib-2D,QGw.cib-3B,QGw.cib-4B.1,QGlw.cib-2D.1,QTgw.cib-2D.1 and QTgw.cib-3B.1,were co.sistently 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 variance.Significant interactions were detected between the two major TGW QTLs and three major GW loci.In addition,QTgw.cib-3B.1 and QGw.cib-3B were co.located,and the improved TGW at this locus was co.tributed by GW.Unlike other loci,QTgw.cib-3B.1/QGw.cib-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 co.parison analysis indicated that QTgw.cib-3B.1/QGw.cib-3B is likely a novel locus.Six haplotypes were identified in the region of this QTL and their distribution frequencies varied between the landraces and cultivars.Acco.ding to gene annotation,spatial expression patterns,ortholog analysis and sequence variation,the candidate gene of QTgw.cib-3B.1/QGw.cib-3B was predicted.co.lectively,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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Knockout of miR396 genes increases seed size and yield in soybean

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Journal of Integrative Plant Biology 2024年第6期66卷 1148-1157页

作者： Hongtao Xie Fei Su Qingfeng Niu Leping Geng Xuesong Cao Minglei Song Jinsong Dong Zai Zheng Rui Guo Yang Zhang Yuanwei Deng Zhanbo Ji Kang Pang Jian-Kang Zhu Jianhua Zhu School of Life Sciences Anhui Agricultural University Research Center for Biological Breeding Technology Research Institute of Frontier Science Anhui Agricultural University Bellagen Biotechnology co.Ltd Institute of Crop Sciences/National Nanfan Research Institute Chinese Academy of Agricultural Sciences Key Laboratory of Gene Editing Technologies (Hainan) Ministry of Agriculture and Rural Affairs Southern University of Science and Technology Hainan Yazhou Bay seed Laboratory

Yield improvement has long been an important task for soybean breeding in the world in order to meet the increasing demand for food and animal feed. mi R396 genes have been shown to negatively regulate grain size in rice,but whether mi R396 family members may function in a similar manner in soybean is unknown. Here, we generated eight soybean mutants harboring different co.binations of homozygous mutations in the six soybean mi R396genes through genome editing with clustered regularly interspaced palindromic repeats(CRISPR)/CRISPR-associated nuclease(Cas)12SF01 in the elite soybean cultivar Zhonghuang 302(ZH302). Four triple mutants (mir396aci, mir396acd, mir396adf, and mir396cdf), two quadruple mutants(mir396-abcd and mir396acfi), and two quintuple mutants(mir396abcdf and mir396bcdfi) were characterized. We found that plants of all the mir396 mutants produced larger seeds co.pared to ZH302 plants. Field tests showed that mir396adf and mir396cdf plants have significantly increased yield in growth zones with relatively high latitude which are suited for ZH302 and moderately increased yield in lower latitude. In co.trast, mir396abcdf and mir396bcdfiplants have increased plant height and decreased yield in growth zones with relatively high latitude due to lodging issues, but they are suited for low latitude growth zones with increased yield without lodging problems.Taken together, our study demonstrated that loss-of-function of mi R396 genes leads to significantly enlarged seed size and increased yield in soybean, providing valuable germplasms for breeding high-yield soybean.

关键词： Cas12SF01 CRISPR/Cas miR396 seed size soybean yield

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Telomere-to-telomere genome of the allotetraploid legume Sesbania cannabina reveals transposon-driven subgenome divergence and mechanisms of alkaline stress tolerance

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Science China(Life Sciences) 2024年第1期67卷 149-160页

作者： Haofei Luo Xiaofei Wang Changqing You Xuedan Wu Duofeng Pan Zhiyao Lv Tong Li Dongmei Zhang Zhongbao Shen Xiaodong Zhang Guodao Liu Kaixuan He Qingtong Ye Yajun Jia Qinghua Zhao Xian Deng Xiaofeng Cao Xianwei Song Gai Huang State Key Laboratory of Plant Genomics and National Center for Plant Gene Research Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China Hainan Yazhou Bay seed Lab Sanya 572025China University of Chinese Academy of Sciences Beijing 100049China Institute of Forage and Grassland Sciences Heilongjiang Academy of Agricultural SciencesHarbin 150086China Shandong Academy of Agricultural Sciences Jinan 250100China National Center of Technology Innovation for co.prehensive Utilization of Saline-Alkali Land Dongying 257345China Shandong Green Manure Eco.ogical Technology co. LtdDongying 257345China State Key Laboratory of Tropical Crop Breeding Chinese Academy of Tropical Agricultural SciencesHaikou 571101China

Alkaline soils pose an increasing problem for agriculture worldwide,but using stress-tolerant plants as green manure can improve marginal land.Here,we show that the legume Sesbania cannabina is very tolerant to alkaline co.ditions and,when used as a green manure,substantially improves alkaline soil.To understand genome evolution and the mechanisms of stress tolerance in this allotetraploid legume,we generated the first telomere-to-telomere genome assembly of S.cannabina spanning~2,087 Mb.The assembly included all centromeric regions,which co.tain centromeric satellite repeats,and co.plete chromosome ends with telomeric characteristics.Further genome analysis distinguished A and B subgenomes,which diverged approximately 7.9 million years ago.co.parative genomic analysis revealed that the chromosome homoeologs underwent large-scale inversion events(>10 Mb)and a significant,transposon-driven size expansion of the chromosome 5A homoeolog.We further identified four specific alkali-induced phosphate transporter genes in S.cannabina;these may function in alkali tolerance by relieving the deficiency in available phosphorus in alkaline soil.Our work highlights the significance of S.cannabina as a green tool to improve marginal lands and sheds light on subgenome evolution and adaptation to alkaline soils.

关键词： Sesbania cannabina alkaline stress telomere-to-telomere genome legume green manure phosphate transporter allotetraploid

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