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Agricultural Biotechnology 2017年第2期6卷 15-18页

作者： Changquan ZHANG Fei CHEN Ran HONG Qianfeng LI Minghong GU Qiaoquan LIU College of Agronomy Yangzhou University

In the present study, a japonica rice （ Oryza sativa L. ） variety Nipponbare, an indica variety 9311 and a set of chromosome segment substitution lines （CSSLs） which were generated using Nipponbare as the recipient parent and 9311 as the donor parent were used as the experimental materials. The CSSLs were grown in 2012 （normal temperature condition） and 2013 （high temperature condition） in Yangzhou, Jiangsu, and were used to map the quantitative trait loci （QTLs） for heat tolerance, based on the heat tolerance index [ （The seed setting rate under normal temperature condition -The seed setting rate under high temper- ature condition） / The seed setting rate under normal temperature condition]. As a result, three QTLs related to heat tolerance in rice were mapped on chromo- somes 2, 4 and 12, respectively. They had LOD （logarithm of rntds） scores of 2.56, 4.02 and 2.79, and contributian rates of 4.95%, 7.99% and 5.44%. Among them, qHT12.1 showed positive effect, while qHT2.1 and qHT4. t showed negative effect on heat tolerance. The results lay a foundation for the fine mapping and cloning of the QTLs and genes related to heat tolerance, and for the breeding of heat-tolerant rice varieties.

关键词： Rice (Oryza sativa L. ) Chromosome segment substitution lines (CSSLs) Quantitative trait loci (QTLs) heat tolerance

ZmHSP16.9,a cytosolic classⅠsmall heat shock protein in maize(Zea mays),confers heat tolerance in transgenic tobacco

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ZmHSP16.9,a cytosolic classⅠsmall heat shock protein in mai...

Mapping QTL for heat-tolerance at Grain Filling Stage in Rice

山东植物生理学会第七次代表大会暨植物生物学与现代农业研讨会

作者： Liping Sun Yang Liu Xiangpei Kong Dan Zhang Jiaowen Pan Yan Zhou Li Wang Dequan Li Xinghong Yang State Key Laboratory of Crop Biology Shandong Key Laboratory of Crop BiologyCollege of Life SciencesShandong Agricultural University Taishan Medical University

Various organisms produce HSPs in response to high temperature and other *** function of heat shock proteins,including small heat-shock protein(sHSP),in stress tolerance is not fully *** improve our understanding of sHSPs,we isolated ZmHSP16.9 from *** alignments and phylogenetic analysis reveal this to be a cytosolic classⅠ***16.9 expressed in root,leaf and stem tissues under 40℃treatment,and was up-regulated by heat stress and exogenous HO. Overexpression of ZmHSP16.9 in transgenic tobacco conferred tolerance to heat and oxidative stresses by increased seed germination rate,root length,and antioxidant enzyme activities compared with WT plants. These results support the positive role of ZmHSP16.9 in response to heat stress in plant.

关键词： heat stress small heat-shock protein maize heat tolerance

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Rice science 2005年第1期12卷 33-38页

作者： ZHUChang-lan XIAOYing-hui WANGChun-ming JIANGLing ZHAIHu-qu WANJian-min StateKeyLaboratoryofCropGeneticsandGermplasmEnhancement JiangsuPlantGeneEngineeringCenterNanjingAgriculturalUniversityNanjing210095China ChineseAcademyofAgriculturalSciences Beijing100081China

A mapping population of 98 lines (backcross inbred lines, BILs) derived from a backcross of Nipponbare/Kasalath// Nipponbare was planted at two experimental sites, Nanjing and Nanchang, and treated with high and optimal temperature during grain filling, respectively. The grain weight heat susceptibility index [GWHSI= (grain weight at optimum temperature-grain weight at high temperature) / grain weight at optimum temperature × 100] was employed to evaluate the tolerance of rice to heat stress. A genetic linkage map with 245 RFLP markers and a mixed linear-model approach was used to detect quantitative trait loci (QTLs) and their main effects, epistatic interactions and QTL× environment interactions (Q×E). The threshold of LOD score=2.0 was used to detect the significance of association between marker and trait. A total of 3 QTLs controlling heat tolerance during grain filling were detected, on chromosomes 1, 4 and 7, with LOD scores of 8.16, 11.08 and 12.86, respectively, and they explained the phenotypic variance of 8.94, 17.25 and 13.50 %, correspondingly. The QTL located in the C1100-R1783 region of chromosome 4 showed no QTL× environment interaction and epistatic effect, suggesting that it could be stably expressed in different environments and genetic backgrounds, and thus it would be valuable in rice breeding for heat tolerance improvement. This QTL allele, derived from Kasalath reduced 3.31% of the grain weight loss under heat stress. One located between R1613-C970 on chromosome 1 and the other between C1226-R1440 on chromosome 7, with additive effect 2.38 and 2.92%, respectively. The tolerance alleles of both these QTLs were derived from Nipponbare. Both of these QTLs had significant QTL× environment interactions, and the latter was involved in epistatic interaction also. Eight pairs of epistatic effect QTLs were detected, one pair each on chromosomes 1,2,3, 5, 7, 8, 10 and 12. The results could be useful for elucidating the genetic mechanism of heat-toleranc

关键词： rice grain filling heat tolerance quantitative trait locus

Research Progress of heat-tolerance of Brassica campestris ssp. Chinensis

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Agricultural Science & Technology 2013年第2期14卷 248-253页

作者：赵晓东张景云范淑英缪南生江西农业大学农学院江西南昌330045 江西省农业科学院蔬菜花卉研究所江西南昌330200

Brassica campestris ssp. chinensis, also known as non-heading Chinese cabbage, is an important vegetable widely distributed in southern China. High temperature is the most common adversity factor in vegetable production, because Brassica campestris ssp. chinensis is a thermophilic vegetable, which can＇t well grow at high temperature. In summer and autumn, high temperature stress would prevent Brassica campestris ssp. chinensis from growing and result in poor quality of its seedlings, seriously influencing yield and quality of the vegetable in later period. In this paper, present situation and latest advances in heat resistance research of Brassica campestris ssp. chinensis in recent years were reviewed at home and abroad. The research tendency in Bassica campestris ssp. chinensis was also described, providing reference for breeding of heat-resistant Brassica campestris ssp. chinensis.

关键词： Brassica campestris ssp. chinensis High temperature stress Morphological index Physiological and biochemical indexes heat tolerance

Novel QTLs from Wild Rice Oryza longistaminata Confer Strong tolerance to High Temperature at Seedling Stage

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Rice science 2023年第6期30卷 577-586页

作者： FAN Fengfeng CAI Meng LUO Xiong LIU Manman YUAN Huanran CHENG Mingxing Ayaz AHMAD LI Nengwu LI Shaoqing State Key Laboratory of Hybrid Rice Key Laboratory for Research and Utilization of Heterosis in Indica Rice of Ministry of Agriculture and Rural AffairsEngineering Research Center for Plant Biotechnology and Germplasm Utilization of Ministry of EducationCollege of Life ScienceWuhan UniversityWuhan 430072China Hubei Hongshan Laboratory Wuhan 430072China

Global warming poses a threat to rice *** heat-tolerant rice is an effective and economical approach to address this *** rice is a valuable genetic resource for developing heat-tolerant crops due to its intricate mechanism for adapting to high *** longistaminata,a widely distributed wild rice species in Africa,may harbor an even richer gene pool for heat tolerance,which remains *** this study,we identified three heat tolerance QTLs from *** at the seedling stage,including novel heat tolerance loci qTT4 and *** findings demonstrated that the *** alleles for these two QTLs can enhance the heat tolerance of rice ***,qTT5 was mapped to a region spanning approximately 287.2 kb,which contains 46 expressing *** the analysis of Gene Ontology and expression differences under heat induction,we identified four candidate *** results lay the foundation for discovering heat tolerance genes underlying *** and developing new genetic resources for heat-tolerant rice breeding.

关键词： wild rice Oryza longistaminata heat tolerance QTL

Effects of heat Stress at Vegetative and Reproductive Stages on Spikelet Fertility

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Rice science 2018年第4期25卷 218-226页

作者： Sulaiman CHEABU Peerapon MOUNG-NGAM Siwaret ARIKIT Apichart VANAVICHIT Chanate MALUMPONG Department of Agronomy Faculty of Agriculture at Kamphaeng Saen Kasetsart University Rice Science Center & Rice Gene Discovery Unit Kamphaeng Sean Campus Kasetsart University

Seed-setting rate, yield components and grain quality traits of 169 accessions from an exotic rice germplasm were tested under high temperatures from 40 oC to 45 oC for 6 h during the daytime at the vegetative and reproductive stages, respectively. The results showed that heat stress significantly decreased the seed-setting rate of all the accessions, but the heat stress effects varied among accessions. Based on the decreases in seed-setting rate at high temperatures, N22 was the most tolerant, followed by AUS17, M9962, SONALEE and AUS16. Moreover, the reductions in seed-setting rate and yield under heat stress were more serious at the vegetative stage （45 d before heading） than at the booting stage （15 d before heading）. In addition, heat stress also affected grain quality, especially by conferring chalkiness to most of the accessions, but SONALEE did not change much. The heat-tolerant accessions identified here and the phenotype protocols developed could be used in future genetic studies and breeding programmes focused on heat tolerance.

关键词： heat tolerance high temperature rice germplasm spikelet fertility seed-setting rate

Development of heat Tolerant Two-Line Hybrid Rice Restorer Line Carrying Dominant Locus of OsHTAS

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Rice science 2021年第1期28卷 99-108页

作者： Mehmood Jan Gulmeena Shah Huang Yuqing Liu Xuejiao Zheng Peng Du Hao Chen Hao Tu Jumin Zhejiang Key Laboratory of Crop Germplasm Resources Institute of Crop ScienceZhejiang UniversityHangzhou 310058ZhejiangChina

In order to create novel germplasm resources for breeding heat tolerant variety,we transferred a dominant allele OsHTAS,previously characterized and cloned from a high-temperature tolerant local variety HT54,which was collected from the rice production area of southern China,into a high-temperature sensitive intermediate breeding line HT13 through six rounds of successive backcross by using marker-assisted *** molecular analysis showed that the recovery of genetic background of a resultant near isogenic line(NIL),MHT13,was around 99.8%.The OsHTAS gene introduced in the MHT13 expressed normally in the HT13 genetic background,mediating heat tolerance and phenotype similar to those of the donor parent *** major agronomic traits of MHT13 resembled those of the recurrent parent ***,MHT13 had high general combining ability and its rice quality reached the grade 3 standard of edible high-quality rice issued by Ministry of Agriculture of the People’s Republic of China,which greatly improved its application value in rice production.

关键词： rice heat tolerance high temperature yield near isogenic line marker-assisted selection grain quality OsHAT gene

heat sensitivity of eggs attributes to the reduction in Agasicles hygrophila population

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Insect Science 2020年第1期27卷 159-169页

作者： Dong Jia Xiao-Fang Yuan Yan-Hong Liu Chao-Qian Xu Yuan-Xin Wang Ling-Ling Gao Rui-Yan Ma College of Agriculture Shanxi Agricultural UniversityTaiguShanxiChina College o f Life Science Shanxi Agricultural UniversityTaiguShanxiChina CSIRO Agriculture and Food Centre for Environment and Life SciencesWembleyWestern AustraliaAustralia

Agasicles hygrophila has been introduced worldwide as a control agent for the invasive weed Alternanthera ***,global warming has potential impact on its controlling *** aim of this research was to explore the primary factors responsible for the greatly reduced *** population in hot *** imitate the temperature conditions in summers,different developmental stages of hygrophila were treated with high temperatures from 32.5℃ to 45℃ for 1-5 *** on the survival rate,the heat tolerance of each developmental stage was ranked from lowest to highest as follows:egg,1st,2nd,3rd instar larva,adult and *** showed the lowest heat tolerance with 37.5℃ as the critical temperature affecting larval *** treatment of the *** eggs at 37.5℃ for 1 h decreased the hatch rate to 24%.Our results indicated that when compared with the control at 25℃,1 h treatment at 37.5℃ prolonged the duration of the egg stage,shortened the duration of oviposition and total longevity,and changed the reproductive pattern of *** net reproductive rate,intrinsic rate and finite rate were all significantly *** results suggest that low heat tolerance of the eggs was the major factor responsible for the reduction of *** populations,and the key temperature was 37.5°***,appropriate measures should be taken to protect eggs in order to maintain the efficacy of *** in the biological control of *** in hot summers.

关键词： age-stage two-sex life table alligator weed flea beetle heat tolerance population dynamics

Pig pangenome graph reveals functional features of non‑reference sequences

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Journal of Animal Science and Biotechnology 2024年第3期15卷 956-970页

作者： Jian Miao Xingyu Wei Caiyun Cao Jiabao Sun Yuejin Xu Zhe Zhang Qishan Wang Yuchun Pan Zhen Wang College of Animal Sciences Zhejiang UniversityHangzhou 310058ZhejiangChina Yazhou Bay Science and Technology City Hainan Institute of Zhejiang UniversityYazhou DistrictBuilding 11Yongyou Industrial ParkSanya 572025HainanChina

Background The reliance on a solitary linear reference genome has imposed a significant constraint on our compre-hensive understanding of genetic variation in *** constraint is particularly pronounced for non-reference sequences(NRSs),which have not been extensively *** In this study,we constructed a pig pangenome graph using 21 pig assemblies and identified 23,831 NRSs with a total length of 105 *** findings revealed that NRSs were more prevalent in breeds exhibiting greater genetic divergence from the reference ***,we observed that NRSs were rarely found within coding sequences,while NRS insertions were enriched in immune-related Gene Ontology ***,our investigation also unveiled a close association between novel genes and the immune capacity of *** observed substantial differences in terms of frequencies of NRSs between Eastern and Western pigs,and the heat-resistant pigs exhibited a substantial number of NRS insertions in an 11.6 Mb interval on chromosome ***,we discovered a 665 bp insertion in the fourth intron of the TNFRSF19 gene that may be associated with the ability of heat tolerance in South-ern Chinese *** Our findings demonstrate the potential of a graph genome approach to reveal important functional features of NRSs in pig populations.

关键词： heat tolerance Immune ability Non-reference sequences Pig pangenome

Identification of natural allelic variation in TTL1 controlling thermotolerance and grain size by a rice super pan-genome∞

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Journal of Integrative Plant Biology 2023年第12期65卷 2541-2551页

作者： Yarong Lin Yiwang Zhu Yuchao Cui Hongge Qian Qiaoling Yuan Rui Chen Yan Lin Jianmin Chen Xishi Zhou Chuanlin Shi Huiying He Taijiao Hu Chenbo Gu Xiaoman Yu Xiying Zhu Yuexing Wang Qian Qian Cuijun Zhang Feng Wang Lianguang Shang Institute of Biotechnology Fujian Academy of Agricultural Sciences/Fujian Provincial Key Laboratory of Genetic Engineering for AgricultureFuzhou 350003China Shenzhen Branch Guangdong Laboratory of Lingnan Modern AgricultureGenome Analysis Laboratory of the Ministry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518124China Xiamen Key Laboratory for Plant Genetics School of Life SciencesXiamen UniversityXiamen 361102China College of Bioscience and Biotechnology Hunan Agricultural UniversityChangsha 410128China State Key Laboratory of Rice Biology China National Rice Research InstituteHangzhou 311401China Yazhouwan National Laboratory Sanya City 572024China

Continuously increasing global temperatures present great challenges to food *** size,one of the critical components determining grain yield in rice(Oryza sativa L.),is a prime target for genetic ***,there is an immediate need for genetic improvement in rice to maintain grain yield under heat ***,quantitative trait loci(QTLs)endowing heat stress tolerance and grain size in rice are extremely ***,we identified a novel negative regulator with pleiotropic effects,Thermo‐tolerance and grain Length 1(TTL1),from the super pan‐genomic and transcriptomic ***‐of‐function mutations in TTL1 enhanced heat tolerance,and caused an increase in grain size by coordinating cell expansion and ***1 was shown to function as a transcriptional regulator and localized to the nucleus and cell ***,haplotype analysis showed that hapL and hapS of TTL1 were obviously correlated with variations of thermotolerance and grain size in a core collection of *** evolution analysis of available rice germplasms suggested that TTL1 was selected during domestication of the indica and japonica rice subspecies,but still had much breeding potential for increasing grain length and *** findings provide insights into TTL1 as a novel potential target for the development of high‐yield and thermotolerant rice varieties.

关键词： domestication grain size heat tolerance pan‐genome natural variation