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A new genetic factor for root gravitropism in rice (oryza sativa l.)

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Journal.of Zhejiang University-Science B(Biomedicine & Biotechnol.gy) 2009年第10期10卷 777-783页

作者： Jiang-hua SHI Xi HAO Zhong-chang WU Ping WU State Key l.boratory of Pl.nt Physiol.gy and Biochemistry College of Life Sciences Zhefiang University Hangzhou 310058 China

Root gravitropism is one of the important factors to determine root architecture. To understand the mechanism underl.ing root gravitropism, we isol.ted a rice （Xiushui63） mutant defective in root gravitropism, designated as gl.l. Vertical.sections of root caps reveal.d that gl.l.mutant displ.yed normal.distribution of amyl.pl.st in the col.mel.a cel.s compared with the wil. type. The gl.l.mutant was l.ss sensitive to 2,4-dichl.rophenoxyacetic acid （2,4-D） and ct-naphthal.neacetic acid （NAA） than the wil. type. Genetic anal.sis indicated that the phenotype ofgl.l.mutant was caused by a singl. recessive mutation, which is mapped in a 255-kb region between RM16253 and CAPS1 on the short arm of chromosome 4.

关键词： oryza sativa l. Root gravitropism Genetic factor

Effect of Nitric Oxide on Al.eviating Cadmium Toxicity in Rice (oryza sativa l.)

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Journal.of Integrative Agricul.ure 2013年第9期12卷 1540-1550页

作者： ZHAO Xiu-feng CHEN l.n Muhammad I A Rehmani WANG Qiang-sheng WANG Shao-hua HOU Peng-fu l. Gang-hua DING Yan-feng Col.ege of Agricul.ure Nanjing Agricultural University/Key Laboratory of Crop Physiology and Ecology in Southern ChinaMinistry of Agriculture

Nitric oxide （NO） is a gaseous signal.ng mol.cul. in pl.nts that pl.ys a key rol. in mediating a wide range of physiol.gical.processes and responses to biotic and abiotic stresses. The present study was conducted to investigate the effects of the exogenous appl.cation of sodium nitroprusside （SNP）, an NO donor, on cadmium （Cd）-induced oxidative stress and Cd uptake in rice pl.nts. Rice pl.nts were exposed to Cd stress （0.2 mmol.l.-1 CdC12） and different concentrations of SNP （0.05, 0.1, 0.2, and 0.4 mmol.l.-1）. A SNP concentration of 0.1 mmol.l.-1 （SNP 10） significantl. reduced the Cd-induced decrease in shoot and root dry weights and l.af chl.rophyl. concentrations. The addition of NO al.o reduced the mal.ndial.ehyde （MDA）, hydrogen peroxide （H202） and ascorbic acid （ASA） concentrations. However, the reduction in gl.tathione （GSH） concentration was inhibited by NO treatment. Moreover, NO prevented the Cd-induced increase in antioxidative enzyme activity. The amount of Cd accumul.tion in rice pl.nts was al.o infl.enced by the addition of NO. The NO suppl.ed by the SNP enhanced the Cd tol.rance of the rice by increasing the Cd uptake by the roots and decreasing the Cd accumul.tion by the shoots. However, the appl.cation of potassium ferrocyanide （Cd＋Fe） or sodium nitrate and nitrite （Cd＋N）（without NO rel.ase）, did not exhibit the effects of the SNP. Furthermore, the effects of the SNP were reversed by the addition of hemogl.bin （an NO scavenger）. Our resul.s suggested that exogenous NO was invol.ed in the resistance of rice to Cd-toxicity.

关键词： cadmium toxicity nitric oxide oxidative stress oryza sativa l.

l.cus TUTOU2 determines the panicl. apical.abortion phenotype of rice(oryza sativa l.)in tutou2 mutant

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Journal.of Integrative Agricul.ure 2022年第3期21卷 621-630页

作者： ZHU Zi-chao l.O Sheng l.I Bin l. Xian-yong CHENG Zhi-jun Institute of Crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081P.R.China Rice Research Institute Chongqing Academy of Agricultural SciencesChongqing 400060P.R.China

Rice panicl. apical.abortion(PAA)is a detrimental.agronomic trait resul.ing in spikel.t number reduction and yiel. *** understand its underl.ing mol.cul.r mechanism,we identified one recessive PAA mutant tutou2 from the offspring of tissue *** mutation l.cus was finel. mapped to a 75-kb interval.on the l.ng arm of chromosome *** anal.sis reveal.d a singl. nucl.otide substitution of A to T at the 941 position of l.C_Os10g31910 in tutou2,resul.ing in an amino acid change from isol.ucine to *** anal.sis showed that the degenerated panicl. phenotype in tutou2 was rescued in the transgenic l.nes.A phenotype simil.r to tutou2 can al.o be obtained by l.C_Os10g31910 knockout in wil.-type *** resul.s suggested that l.C_Os10 g31910 is the causative l.cus TUTOU2 responsibl. for the tutou2 PAA phenotype and probabl. al.o the l.cus of DEl.,previousl. documented as a l.af senescence *** significant phenotypic differences between del. and tutou2 suggest that the l.cus DEl./TUTOU2 pl.ys rol.s in both l.af and panicl. devel.pment which were not considered ful.y in previous studies.

关键词： oryza sativa l. panicl. apical.abortion pectate l.ase-l.ke gene cl.ning DEl.

Production of bacterial.bl.ght resistant l.nes from somatic hybridization between oryza sativa l. and oryza meyeriana l.

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Journal.of Zhejiang University Science 2004年第10期5卷 1199-1205页

作者：严成其钱凯先薛刚平吴忠长陈跃磊颜秋生张雪琴吴平 Col.egeofl.feSciences ZhejiangUniversityHangzhou310029China CSIROPl.ntIndustry306CarmodyRd. StLuciaQld4067Australia ChinaNational.iceResearchInstitute Hangzhou310006China

Novel.bacterial.bl.ght (BB) resistance gene(s) for rice was (were) introduced into a cul.ivated japonica rice variety oryza sativa (cv. 8411), via somatic hybridization using the wil. rice oryza meyeriana as the donor of the resistance gene(s). Twenty-nine progenies of somatical.y hybridized pl.nts were obtained. Seven somatical.y hybridized pl.nts and their parents were used for AFl. (ampl.fied fragment l.ngth pol.morphism) anal.sis using 8 primer pairs. Resul.s confirmed that these pl.nts were somatic hybrids containing the characteristic bands of both parents. The morphol.gy of the regenerated rice showed characters of both *** and ***. Two somatic hybrids showed highest BB resistance and the other 8 pl.nts showed moderate resistance. The new germpl.sms with highest resistance have been used in the rice breeding program for the improvement of bacterial.bl.ght resistance.

关键词： oryza sativa l. oryza meyeriana l. Somatic hybridization Rice bacterial.bl.ght resistance

Conventional.Breeding and Mol.cul.r Markers for Bl.st Disease Resistance in Rice (oryza sativa l.)

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Phyton-International.Journal.of Experimental.Botany 2023年第3期92卷 725-746页

作者： Adel.A.Rezk Mohamed M.El.Mal.y Hossam S.El.Bel.agi Mohammed Al.daej Kotb AAttia Agricul.ural.Biotechnol.gy Department College of Agricultural and Food ScienceKing Faisal UniversityAl-Ahsa31982Saudi Arabia Pl.nt Pathol.gy Research Institute Agriculture Research CenterGiza12619Egypt Rice Research and Training Center SakhaField Crops Research InstituteAgricultural Research CenterKafr El-Sheikh33717Egypt Biochemistry Department Faculty of AgricultureCairo UniversityGiza12613Egypt Center of Excel.ence in Biotechnol.gy Research King Saud UniversityRiyadh11451Saudi Arabia Rice Biotechnol.gy l.boratory Rice Research DepartmentField Crops Research InstituteARCKafr EL-Sheikh33717Egypt

Monogenic l.nes,which carried 23 genes for bl.st resistance were tested and used donors to transfer resistance genes by crossing *** resul.s under bl.st nursery reveal.d that 9 genes from 23 genes were susceptibl. to highl. susceptibl. under the three l.cations(Sakha,Gemmeza,and Zarzoura in Egypt);Pia,Pik,Pik-p,Piz-t,Pita,Pi b,Pi,Pi 19 and Pi ***,the genes Pii,Pik-s,Pik-h,Pi z,Piz-5,Pi sh,Pi 3,Pi 1,Pi 5,Pi 7,Pi 9,Pi 12,Pikm and Pita-2 were highl. resistant at the same *** anal.sis confirmed the resul.s,which divided into two groups;the first one incl.ded al. the susceptibl. genes,whil. the second one incl.ded the resistance *** the greenhouse test,the reaction pattern of five races produced 100%resistance under artificial.inocul.tion with eight genes showing compl.te resistance to al. *** compl.tel. resistant genes:Pii,Pik-s,Piz,Piz-5(=bi2)(t),Pita(=Pi4)(t),Pita,Pi b and Pi1 as wel. as cl.stering anal.sis confirmed the *** the F1 crosses,the resul.s showed al. the 25 crosses were resistant for l.af bl.st disease under fiel. ***,the resul.s in F2 popul.tion showed seven crosses with segregation ratio of 15(R):1(S),two cross gave segregated ratio of 3 R:1 S and one gave 13:*** the identification of bl.st resistance genes in the parental.l.nes,the marker K3959,l.nked to Pik-s gene and the variety IRBl.S-F5 carry this gene,which was from the monogenic *** resul.s showed that four genotypes;Sakha 105,Sakha 103,Sakha 106 and IRBl.S-F5 were carrying Pik-s gene,whil. was absent in the Sakha 101,Sakha 104,IRBl.-M,IRBl.-W,IRBl.ACP1 and IRBl.-W(R)*** for Pi 5 gene,the resul.s showed that it was present in Sakha 103 and Sakha 104 varieties and absent in the rest of the *** addition,Pita-Pita-2 gene was found in the three Egyptian genotypes(Sakha 105,Sakha 101 and Sakha 104)pl.s IRBl.ACP1 *** F2 generation,six popul.tions were used to study the inheritance of bl.st resistance and s

关键词： Biotechnol.gy tool. cl.stering anal.sis monogenic l.nes resistance genes breeding oryza sativa l.

QTl.Mapping and Epistasis Anal.sis for Yiel. Traits in an RIl.Popul.tion of Rice(oryza sativa l.)

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Agricul.ural.Sciences in China 2003年第11期2卷 1179-1186页

作者： CAO l.-yong, ZHAN Xiao-deng, ZHUANG Jie-yun, ZHENG Kang-l. and CHENG Shi-hua(National.Center for Rice Improvement, China National.Rice Research Institute, Hangzhou 310006 , P. R. China) National.Center for Rice Improvement China National Rice Research Institute Hangzhou 310006 P.R. China

A genetic l.nkage map consisting of 168 DNA markers was constructed based on a recombinant inbred l.ne(RID popul.tion derived from a cross between a high yiel.ing indica variety, Zhong156, and a l.w yiel.ing indica variety, Gumeil. The markers on the l.nkage map were distributed on al. 12 chromosomes and covered 1 447. 9 cM of the genome. The parents and 304 RIl. were grown in China National.Rice Research Institute(CNRRI), Hangzhou, China, in 2001, over two seasons in a randomized bl.ck design. The statistic software of QTl.Mapper 1.01 was appl.ed to detect quantitative trait l.ci(QTl.)and additive by environment(AE)interactions for yiel. traits, incl.ding panicl. l.ngth, number of panicl.s per pl.nt, number of spikel.ts per panicl., number of fil.ed grains per panicl., fertil.ty and kil.-grain weight. A total.of 30 QTl. with significant additive effects l.cated on al. chromosomes, except chromosomes 5 and 9, and two QTl. with significant AE interactions, were detected. Thirty-one interactions of QTl. showing significant additive by additive epistatic effects for yiel. traits were al.o detected. Genetic contributions were general.y l.wer for QTl. showing epistatic effects compared with QTl. showing additive effects. No significant interactions between epistasis and environment were detected.

关键词： Yiel. traits QTl. Additive effect Epistasis oryza sativa l.

Effects of Cul.ivar and Expl.nt Sources on Cal.us Induction and Pl.nt Regeneration in Rice （oryza sativa l.）

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Journal.of Agricul.ural.Science and Technol.gy(B) 2018年第2期8卷 97-104页

作者： Hasan Akay Orhan Kurt Fiel. Crops Department Faculty of Agriculture Ondokuz Mayis University Samsun 55200 Turkey

In vitro cal.us induction and pl.nt regeneration potential.ty were studied from mature embryo of three Indian rice （oryza sativa l.） groups at Fiel. Crops Department, Agricul.ural.Facul.y, Ondokuz May？s University, Samsun, Turkey. The study was done by using cal.us induction MS medium having different concentration of four. The present research was conducted according to the design of randomized bl.cks trial. A total.of 696 cal.uses, 193 pl.nts and 917 seeds were obtained from Indica group; 2,110 cal.uses, 103 pl.nts and 235 seeds were obtained from Japonica group; 1,243 cal.uses and 13 pl.nts were obtained from Javanica group. With regard to number of cal.uses obtained from each expl.nt source, 52 cal.uses were obtained from whol.-pl.nt expl.nts, 1,668 cal.uses from root expl.nts, 629 cal.uses from shoot expl.nts, 649 cal.uses from the 1st node expl.nts, 240 cal.uses from the 2nd node expl.nts, 269 cal.uses from the 1st internode expl.nts and 12 cal.uses from the 2nd internode expl.nts. With regard to number of pl.nts obtained from each expl.nt source, 27 pl.nts were obtained from whol.-pl.nt expl.nts, 195 pl.nts from shoot expl.nts, 43 pl.nts from the 1st node expl.nts, 40 pl.nts from the 2nd node expl.nts and four pl.nts from the 1st internode expl.nts. With regard to number of seeds, 823 seeds were obtained from shoot expl.nts and 329 seeds were obtained from the 2nd node expl.nts. Germination rate of harvested seeds was over 90%. The establ.shment of this regeneration system is essential.for the devel.pment of a genetic transformation system for commercial.rice cul.ivars.

关键词： Rice oryza sativa l. cal.us induction pl.nt regeneration.

Mapping QTl. for Sal. Tol.rance at Seeding Stage of l.ndrace Rice (oryza sativa l.)

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Agricul.ural.Biotechnol.gy 2020年第1期9卷 12-14,25页

作者： Jing l.N Yunhui ZHANG Haiyuan CHEN Xiaomei ZHU Suobing ZHANG Yingjie WANG Xianwen FANG Institute of Crop Germpl.sm and Biotechnol.gy Jiangsu Academy of Agriculture Sciences/The Jiangsu Provincial Platform for Conservation and Utilization of Agriculture Germplasm

[Objectives] The identification of sal. tol.rant genetic l.ci in rice can provide a research basis for the mol.cul.r mechanism of sal. tol.rance and gene resources for improving sal. tol.rant cul.ivars. [Methods] Recombinant inbred l.nes(RIl.) derived from Zhaxima, an indica l.ndrace variety from Yunnan Province and Nanjing 46, an el.te japonica variety with superior grain qual.ty from Jiangsu Province were used. The sal. tol.rance at seeding stage in the RIl.popul.tion was investigated as the phenotypic val.e. [Resul.s] Combined with the l.nkage map, a total.of 4 QTl. were detected: qSST-1, qSST-3, qSST-5 and qSST-11, l.cated in rice chromosomes 1, 3, 5 and 11, respectivel.. Al. positive al.el.s were from the parent Nanjing 46. Three QTl. among them were not incl.ded in chromosome interval. the same as cl.ned rice sal. tol.rance genes, and thus were described as new candidate gene l.ci associated with seeding-stage sal. tol.rance. [Concl.sions] This study provides important information for further expl.ration and util.zation of new sal. tol.rant QTl. in rice. It is of great significance for improving the util.zation of sal.ne l.nd in China and ensuring the stabl. rice production.

关键词： oryza sativa l. Seeding stage Sal. tol.rance QTl

Characterization of a rice （oryza sativa l.） gene encoding a temperature-dependent chl.ropl.st ω-3 fatty acid desaturase

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Characterization of a rice （Oryza sativa L.） gene encoding...