检索结果-南通市图书馆

Novel QTLs from wild rice Oryza longistaminata Confer Strong Tolerance to High Temperature at Seedling Stage

在线全文

学校读者我要写书评

暂无评论

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

Identification of quantitative trait loci and candidate genes associated with ABA sensitivity in common wild rice (Oryza rufipogon Griff,)

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2017年第11期16卷 2375-2385页

作者： CAI Wen-yang TAN Lu-bin LIU Feng-xia SUN Chuan-qing National Center for Evaluation of Agricultural wild Plants (rice)/Beijing Key Laboratory of Crop Genetic Improvement/Departmentof Plant Genetics and Breeding China Agricultural University Beijing 100193 P.R. China

Abscisic acid （ABA）, as one of the foremost signaling molecules in plants, is an important hormone which plays versatile functions in regulating developmental process and adaptive stress process. A set of introgression lines were previously generated via a backcrossing program using an elite indica cultivar rice Teqing （O. sativa L.） as recipient and an accession of Yuanjiang common wild rice （O. rufipogon Griff.） as donor. In this study, the previously developed introgression lines were evaluated for ABA sensitivity. Here we reported that a total of 14 quantitative trait loci （QTLs） associated with ABA sensitivity were identified. An ABA sensitive introgression line, YIL53, was identified and characterized. Physiological characterization, including chlorophyll content, malondialdehyde content, soluble sugar content, and stomata movement, demonstrated that YIL53 exhibited the characteristics associated with ABA sensitivity. Genotypic analysis revealed that YIL53 harbored one QTL related to ABA sensitivity, qASS1-2, which was located on chromosome 1 within one introgressed segment derived from the Yuanjiang common wild rice. Furthermore, the qASS1-2 was finally narrowed down to a 441-kb region between simple sequence repeats （SSR） marker RM212 and single nucleotide polymorphism （SNP） marker M3 using the segregation population derived from the cross between Teqing and YIL53, and three candidate genes associated with ABA sensitivity were identified using a strategy combined gene expression analysis with QTL mapping. Identification of the QTLs related to ABA sensitivity and characterization of the ABA sensitive line YIL53 would provide a helpful basis for isolating novel genes related to ABA sensitivity.

关键词： wild rice introgression lines ABA sensitivity quantitative trait locus candidate gene

The Taxonomy and the SEM Observation on Tubercles on Lemma of Yihuang wild rice

在线全文

学校读者我要写书评

暂无评论

Agricultural Sciences in China 2006年第7期5卷 491-497页

作者： HE Xiao-peng HE Hao-hua PENG Xiao-song FU Jun-ru LIU Yi-bai WU Qiang HUA Yu-jian XU Bo-gan WANG Xiang-kun College of Agronomy Jiangxi Agricultural University/Key Laboratory of Crop Physiology Ecology and Genetic Breeding of Jiangxi Province Nanchang 330045 P.R.China Fuzhou Agricultural Research Institute Fuzhou 344000 P.R.China Forest Workstation of Zhongfan Town of Yihuang County in Jiangxi Province Yihuang 344400 P.R.China College of Agronomy and Biotechnology China Agricultural University Beijing 100094 P.R.China

To distinguish the taxonomy of Yihuang wild rice found in Yihuang County, Jiangxi Province, China in 1999, the botanical characteristics of Yihuang wild rice were retrieved by genus, and species; at the same time, the tubercle characters on lemma in Yihuang wild rice, O. rufipogon, 0. officinalis, 0. meyeriana, and O. granulata, were also observed by scanning electron microscopy. The retrieval result by genus showed that Yihuang wild rice is Leersia Soland. Ex Swartz., not Oryza L., Hygroryza Nees and Chikusichloa Koidz. The retrieval result by species showed that Yihuang wild rice is L. sayanuka Ohwi, not L. hexandra Swartz., L. japonica （Makino） Honda and L. oryzoides （L.） Swartz. The results of the SEM observation on tubercles on lemma showed that the tubercle characters on lemma of Yihuang wild rice belongs to ＂inlaid- silica-peak＂ type, which is different from the three types of wild rice existing in China, O. rufipogon, O. officinalis, O. Meyeriana, and also O. granulata, but is similar to L. tisseranti, thereby gives a proof of the above retrieval results. It could be concluded that Yihuang wild rice does not belong to Oryza L., but to Leersia sayanuka Ohwi of Leersia Soland. Ex Swartz.

关键词： Yihuang wild rice taxonomy tubercle characters on lemma wild rice Leersia L. sayanuka Ohwi

Cloning and Sequence Analysis of Disease Resistance Gene Analogues from Three wild rice Species in Yunnan

在线全文

学校读者我要写书评

暂无评论

Agricultural Sciences in China 2003年第3期2卷 265-272页

作者： LIUJ－i－mei YANGMing－zhi 等 BiotechnologyResearchInstitute YunnanAcademyofAgriculturalSciencesKunming650223P.R.China BiotechnologyDepartment YunnanUniversityKunming650091P.R.China

Two sets of degenerate oligonucleotide primers were designed according to amino acid conserved regions of reported plant disease resistance genes which encode proteins that contain nucleotide-binding site and leucine-rich repeats(NBS-LRR), and the plant disease resistance genes which encode serine/threonine protein kinase(STK). By polymerase chain reaction(PCR), disease resistance gene analogues have been amplified from three wild rice species in Yunnan Province, China. The DIN A fragments from amplification have been cloned into the pGEM-T vector respectively. Sequencing of the DNA fragments indicated that 7 classes, 2 classes and 6 classes NBS-LRR disease resistance gene analogues from Oryza rufipogon Griff. , Oryza officinalis Wall. , and Oryza meyeriana Baill. were obtained respectively. The two representative fragments of TO12 from Oryza officinalis Wall, and TR19 from Oryza rufipogon Griff, belong to the same class and homology of their sequences are 100%. The result shows that the sequences of the same class disease resistance gene analogues have no difference among different species of wild rice. 5 classes STK disease resistance gene analogues were also obtained among which 4 classes from Oryza rufipogon Griff. , 1 class from Oryza officinalis Wall. By comparison analysis of amino acid sequences. we found that the obtained disease resistance gene analogues have very low identity(low to 25%) with the reported disease resistance gene L6, N, Bs2, Prf, Pto, Lr10 and Xa21 etc. The finding suggests that the obtained disease resistance gene analogues are analogues of putative disease resistance genes that have not been isolated so far.

关键词： wild rice Disease-resistance gene Nucleotide-binding site ( NBS) Leucine-rich repeat (LRR) Serine/threonine protein kinase(STK) Analogues

Discovery and Significance of the Grain of wild rice in Ancient-Woods Layer in Zhujiajian Island of Zhejiang Province, China

在线全文

学校读者我要写书评

暂无评论

rice science 2004年第3期11卷 147-149页

作者： SHENXian-sheng LIShu-mei YANGJie-pin SUNHao SchoolofLifeSciences UniversityofScienceandTechnologyofChinaHefei230027China

A large number of plant remains were discovered in the ancient-woods layer of Zhujiajian Island, Zhejiang Province. There were some thick trunks, complete laminas, fruit, seeds and so on. According to radiocarbon tests conducted for plant remains, the ancient-woods layer has been dated back to about 8750 - 6200 years, and the vegetation was a subtropical evergreen and deciduous broad-leaved mixed forests on the island in the past. In the middle of the ancient-woods layer, two grains of wild rice were explored accidentally, which are Oryza rufipogon, along with the fruit and seeds of some water plants, such as Ceratophyllum demersum, C. oryzetorum, Euryale ferox, Trapa incisa var. quadricaudata , Scirpus yagara and so on. There might be marshy soil and a pond in ancient forest vegetation from where the grains of wild rice and hydrophytic fruit were found. It is of tremendous importance to study the origin of wild rice in China.

关键词： ancient-woods layer wild rice agricultural archaeology

Discovery and Utilization of Small Brown Planthopper Resistance Gene in wild rice

在线全文

学校读者我要写书评

暂无评论

Discovery and Utilization of Small Brown Planthopper Resista...

Fine mapping of the qLOP2 and qPSR2-1 loci associated with cold tolerance of wild rice seedlings

中国植物病理学会2012年学术年会

作者： ZHANG Wei-Lin YAN Cheng-Qi CHEN Jian-Ping (Institute of Virology and Biotechnology MO A and Zhejiang Provincial Key Laboratory for Plant Virology,Zhejiang academy of Agricultural Sciences)

＜正＞rice（Oryza sativa L.） is a primary staple food for more than 50%of the world population. Insect pests are major biotic constraints in rice production and *** small brown planthopper -SBPH（Laodelphax striatellus Fallen） is an economically important pest in *** not only causes direct damage by sucking plant sap,but also transmits several viral diseases such as rice stripe virus （RSV） and rice black-streaked dwarf virus,which often cause major yield losses. Protection against the SBPH greatly depended on insecticides,which has brought about enhanced resistance of SBPH to chemicals,environmental pollution and natural enemy death and in turn resulted in the pest ***-plant resistance has been recognized as one of the most economic and effective measures in controlling the SBPH and RSV because of prevention of transmission of *** to date, some resistant varieties were identified and 31 SBPH-resistance genes were mapped on the chromosome. Not the same germplasm resources for resistance to the SBPH as that previously reported,discovery and utilization of the SBPH-resistance gene in wild rice was performed by our *** rice species possess the nature resistance to the *** using asymmetric somatic hybridization with wild rice as the donor species and ***（02428） as the recipient species,from the progeny lines,we obtained Pf9279-4,which confers high resistance to the *** resistance heredity and breeding for resistance varieties is *** some resistant varieties were identified and 31 SBPH-resistance genes were mapped on the chromosome,up to date,none of resistance genes was cloned,so screening and cloning the resistant genes from the wild rice connected with breeding are nice pathway for rice production and security.

关键词： small brown planthopper wild rice resistant genes

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Fine mapping of the qLOP2 and qPSR2-1 loci associated with c...

Study on Young Panicle Culture in vitro From wild rice of Different Genomes

江苏省遗传学会2014年学术研讨会

作者： Weinan Huang Ning Xiao Yong Gao Zhengyuan Dai Jianmin Chen Yangzhou University

Cold tolerance at the seedling stage(CTS) is an important trait affecting rice production in temperate climates and high-altitude *** identify quantitative trait loci(QTLs) associated with CTS,a preliminary mapping group consisting of 151 BC2 F1 plants was constructed with cold-tolerant Dongxiang wild rice(Oryza rufipogon Griff.) as a donor parent and cold-sensitive indica as a recurrent *** 130 codominant polymorphic simple sequence repeat markers,two major QTLs associated with leaf osmotic potential(LOP) and plant survival rate(PSR) were detected together near RM318 on the long arm of chromosome 2 by composite interval *** two QTLs,qLOP2(LOD = 3.79) and qPSR2-1(LOD = 3.3),accounted for 10.1% and 12.3%,respectively,of the phenotypic *** fine-map these QTLs,a large segregating population of 11,326 BCF backcross introgression lines was *** on phenotypes/genotypes of the advanced backcross progenies,qLOP2 and qPSR2-1 were dissected as a single QTL factor and fine-mapped to a 39.3-kb candidate region defined by markers RM221 and *** and sequence analysis results confirmed Os02 g0677300 as a cold inducible gene for *** belongs to CBF/DREB *** the plant transgenic technology,rice cold resistant phenotype received a significant *** study provides novel alleles that improve rice cold tolerance by marker-assisted selection and contributes to the understanding of molecular mechanisms related to cold tolerance in rice.

关键词： Cold tolerance wild rice QTL seedlings stage CBF/DREB1s

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Wuhan University Journal of Natural Sciences 2000年第1期5卷 119-122页

作者： SHU Li-hui YIN Xiao-hui REN Xiang HE Guang-cun (College of Life Sciences, Wuhan University, Wuhan 430072,China) College of Life Sciences Wuhan University Wuhan 430072China

Researches have been made on young panicle culturein vitro from wild rice of different genomes. Main results are as follows: 1. The induction frequencies of young panicle culturedin vitro from wild rice varied largely a relation to its genome. The optimal induction period of callus is the stamen and pistil differentiation stage of young panicle development. 2. Plantlets were regenerated through two ways: first, culture method, the induced calli were transferred onto differentiation medium; second, regenerate plantlets directly from young panicles of wild rice that were cultured on the differentiation medium. 3. The regeneration rate of green plantlets that obtained through cryopreservated calli inO. meyeriana was 10 times higher than that of control.

关键词： wild rice young panicle Induction frequency plant regeneration

Sympatric Speciation in Action:a Case Study in Two wild rice Species

在线全文

学校读者我要写书评

暂无评论

Sympatric Speciation in Action:a Case Study in Two Wild Rice...