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中国植物病理学会2016年学术年会

作者： LIU Shu-fang DONG Li-ying LI Xun-dong YANG Qin-zhong Institute of Agricultural Environment ＆ Resources Yunnan Academy of Agricultural Sciences

Rice blast,caused by Magnaporthe oryzae is one of the most destructive disease of rice worldwide,and the use of resistant cultivars is the most economic,effective and environment-friendly *** the pathogenicity of *** population to known resistant genes will facilitate the effectively selection of resistant genes in rice breeding *** present study,total of 153 *** strains collected from Borikhamxay,Vientiane,Saravane,Savanaket provinces of Laos were pathotyped on 24 monogenic lines（MLs） with the genetic background of Lijiangxingtuanheigu（Oryza sativa ***）,which have been developed by *** results showed that no strains were found to be virulent on MLs carrying Pi9 and Pik-h,respectively,indicating that these two genes could be very important resources for rice breeding to improve modern cultivars for resistance to rice *** genes,***1,Pik-m,Pik,Pi7 and Pik-p with lower susceptible frequency of less than 6%to the *** strains used in this study,could also be useful resources for disease-resistant breeding;The susceptible frequency of Piz,Pita,Pi2 and Pi5 genes to 153 blast strains are 9.8%,10.46 and13.1%,respectively,indicating that these genes could be rationally employed in rice *** other genes,such as Pish,Pi12,Pita-2 and Pi20 etc.,could not used as resistant donors alone in rice breeding programs for blast,but could be pyramided with other genes showing the overlapping of resistant spectrum with them into cultivars to broaden their resistant spectrum to *** addition,pathotyping of the blast strains on MLs would provide important information for us to select strains virulent to a certain resistant gene to analyze the mechanism of loss function of Avirulent gene in *** corresponding to the resistant gene in rice.

关键词： Magnaporthe oryzae Pathogenicity analysis monogenic lines Rice

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Conventional Breeding and Molecular Markers for Blast 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-Malky Hossam S.El-Beltagi Mohammed Al-daej Kotb AAttia Agricultural Biotechnology Department College of Agricultural and Food ScienceKing Faisal UniversityAl-Ahsa31982Saudi Arabia Plant Pathology 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 Excellence in Biotechnology Research King Saud UniversityRiyadh11451Saudi Arabia Rice Biotechnology Laboratory Rice Research DepartmentField Crops Research InstituteARCKafr EL-Sheikh33717Egypt

monogenic lines,which carried 23 genes for blast resistance were tested and used donors to transfer resistance genes by crossing *** results under blast nursery revealed that 9 genes from 23 genes were susceptible to highly susceptible under the three locations(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 highly resistant at the same *** analysis confirmed the results,which divided into two groups;the first one included all the susceptible genes,while the second one included the resistance *** the greenhouse test,the reaction pattern of five races produced 100%resistance under artificial inoculation with eight genes showing complete resistance to all *** completely resistant genes:Pii,Pik-s,Piz,Piz-5(=bi2)(t),Pita(=Pi4)(t),Pita,Pi b and Pi1 as well as clustering analysis confirmed the *** the F1 crosses,the results showed all the 25 crosses were resistant for leaf blast disease under field ***,the results in F2 population 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 blast resistance genes in the parental lines,the marker K3959,linked to Pik-s gene and the variety IRBLKS-F5 carry this gene,which was from the monogenic *** results showed that four genotypes;Sakha 105,Sakha 103,Sakha 106 and IRBLKS-F5 were carrying Pik-s gene,while was absent in the Sakha 101,Sakha 104,IRBL5-M,IRBL9-W,IRBLTACP1 and IRBL9-W(R)*** for Pi 5 gene,the results 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)plus IRBLTACP1 *** F2 generation,six populations were used to study the inheritance of blast resistance and s

关键词： Biotechnology tools clustering analysis monogenic lines resistance genes breeding Oryza sativa L.

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