Journal ArticleDOI
A new gene for resistance to green leafhopperNephotettix virescens (Distant) in rice
M. U. Ghani,Gurdev S. Khush +1 more
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TLDR
The mode of inheritance of resistance to green leafhopper in 12 cultivars of riceOryza saliva L. was studied, revealing that single dominant genes confer resistance in six varieties, two independent dominant genes in four varieties, and single recessive genes in two varieties.Abstract:
The mode of inheritance of resistance to green leafhopper in 12 cultivars of riceOryza saliva L. was studied. Seedlings of parent and hybrid populations were artificially infested with second- and third-instar virus-free green leafhopper nymphs. Seedling reaction was scored when TNI, the susceptible check, was completely killed. The results revealed that single dominant genes confer resistance in six varieties, two independent dominant genes in four varieties, and single recessive genes in two varieties. The single dominant genes in Sri Gaya, ARC 7320, and T23 and one of the two genes in Aswina and Bhura Rata 2 are allelic toGlh-1; while Bhawalia hasGlh-5 gene. The second gene of Bhura Rata 2 is allelic to IR28 gene. Resistance in Chamar is controlled by two independent genes one of which is allelic toGlh-5 and the other allelic to IR28 gene. Bazal hasGlh-2 andGlh-5. The single recessive gene in ARC 7012 is allelic toglh-4 but the single recessive gene in DV85 is nonallelic to and independent ofglh-4. This new recessive gene is designated asglh-8. The single dominant genes of Dumai, Gadur, and the second gene of Aswina are nonallelic to all the known genes for resistance.read more
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Journal ArticleDOI
Rice Resistance to Planthoppers and Leafhoppers
TL;DR: The review calls for a greater diversity of phenotyping methods to enhance the durability of resistant varieties developed using marker-aided selection and emphasizes a need to anticipate the development of virulent hopper populations in response to the field deployment of genes.
Journal ArticleDOI
The Biology, Epidemiology, and Management of Rice Tungro Disease in Asia
Osmat Azzam,T.C.B. Chancellor +1 more
TL;DR: Rice tungro disease is the most important of the 14 rice viral diseases in South and Southeast Asia and was first recognized as a leafhopper-transmitted virus disease in 1963.
Book ChapterDOI
Genetics Of Resistance To Insects In Crop Plants
Gurdev S. Khush,Darshan S. Brar +1 more
TL;DR: This chapter reviews the genetics of resistance to insects in crop plants and presents several cases, such as rice variety IR36, which is resistant to brown planthopper, green leafhopper, yellow stem borers, striped stem borer, and gall midge.
Breeding for resistance to planthoppers in rice
TL;DR: There is a need to develop gene-based markers, particularly single nucleotide polymorphism markers, to accelerate the transfer of genes into different genetic backgrounds and for breeding varieties resistant to hoppers, particularly in the context of climatic change.
Journal ArticleDOI
Current understanding of the genomic, genetic, and molecular control of insect resistance in rice
TL;DR: These ongoing functional genomic studies provide insights into the molecular basis of rice–insect interactions and facilitate the development of novel insect-resistant rice varieties, improving long-term control of insect pests in this crucial crop.
References
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Book
Genetic evaluation for insect resistance in rice
TL;DR: Genetic evaluation for insect resistance in rice shows positive results for maize with high resistance to E.coli, while in rice with low resistance, the results are negative for other crops.
Book ChapterDOI
Disease and insect resistance in rice.
TL;DR: This chapter discusses the nature of the disease or insect, its distribution, genetic variability of the pathogen, host resistance, genetics of resistance, and breeding for resistance in developing rice that is resistant to diseases and insects.
Journal ArticleDOI
Genetics of Resistance to Brown Planthoppers and Green Leafhoppers in Oryza sativa L.1
TL;DR: The genetics of resistance of several rice cultivars to the brown planthopper, Nilaparvata o lugens, and to the green leafhopper, Nephotettix impicticeps, was studied in the greenhouse to determine the mode of inheritance of insect resistance and to identify genes for resistance that might be incorporated into future varieties.
Journal ArticleDOI
Resistance to Nephotettix impicticeps and Nilaparvata lugens in Varieties of Rice
TL;DR: Of the many insect pests of rice, the rice green leafhopper, Nephotettix impicticeps, and the brown planthopper, Nilaparvata lugens, are particularly damaging.
Breeding rice for resistance to insects
TL;DR: The author reviews the present status of varietal resistance in rice to the principal insect pests of the crop and discusses the levels of resistance to individual pest species, the distribution of resistant varieties, different biotypes and the inheritance of resistance.