scholarly journals Particle-bombardment-mediated co-transformation of elite Chinese rice cultivars with genes conferring resistance to bacterial blight and sap-sucking insect pests

Planta ◽  
1999 ◽  
Vol 208 (4) ◽  
pp. 552-563 ◽  
Author(s):  
Kexuan Tang ◽  
Porntip Tinjuangjun ◽  
Yanan Xu ◽  
Xiaofen Sun ◽  
John A. Gatehouse ◽  
...  
Keyword(s):  
Particle Bombardment ◽  
Bacterial Blight ◽  
Insect Pests ◽  
Rice Cultivars

Improvement of Bacterial Blight Resistance in Rice Cultivars Jyothi and IR50 via Marker-Assisted Backcross Breeding

2008 ◽  
Vol 21 (1) ◽  
pp. 101-116 ◽  
Author(s):  
S. Bharathkumar ◽  
R. S. David Paulraj ◽  
P. V. Brindha ◽  
S. Kavitha ◽  
S. S. Gnanamanickam
Keyword(s):  
Bacterial Blight ◽  
Blight Resistance ◽  
Rice Cultivars ◽  
Bacterial Blight Resistance ◽  
Backcross Breeding ◽  
Marker Assisted Backcross Breeding

Relationships of brown planthopper resistance to tungro virus and grain characteristics in rice

1987 ◽  
Vol 109 (3) ◽  
pp. 609-610 ◽  
Author(s):  
G. S. V. Prasad ◽  
M. V. S. Sastry ◽  
J. R. K. Rao ◽  
A. Ghosh ◽  
Y. Kondala Rao
Keyword(s):  
Oryza Sativa ◽  
Insect Pests ◽  
Effective Means ◽  
Brown Planthopper ◽  
Nilaparvata Lugens ◽  
Rice Cultivars ◽  
Genetics Of Resistance ◽  
Green Leafhopper ◽  
Resistant Varieties ◽  
Brown Planthopper Resistance

Brown planthopper, Nilaparvata lugens (Stal), is one of the most serious insect pests of rice (Oryza sativa L.) throughout Asia. Introduction of resistant varieties could be an effective means of minimizing losses from the pest. Several hundred rice cultivars resistant to the pest have been identified and the genetics of resistance has been analysed. Studies have shown that the genes for resistance to brown planthopper, bph-4, and to green leafhopper, Glh-3, are linked (Sidhu & Khush, 1979). Ideka & Kaneda (1983) reported that bph-2 for brown planthopper resistance was linked with the gene d2 for dwarfness. The present study sought to ascertain relationships between resistance to brown planthopper and tungro virus and grain characteristics.

scholarly journals Effects of elevated CO2 on resistant and susceptible rice cultivar and its primary host, brown plant hopper (BPH), Nilaparvata lugens (Stal)

2020 ◽  
Author(s):  
Sengottayan Senthil-Nathan
Keyword(s):  
Elevated Co2 ◽  
Insect Pests ◽  
Rice Cultivar ◽  
Nilaparvata Lugens ◽  
Carbon Accumulation ◽  
Rice Cultivars ◽  
Ambient Conditions ◽  
Primary Host ◽  
Nilaparvata Lugens Stål ◽  
Brown Plant Hopper

Abstract Elevated CO2 has positive response on plant growth and negative response on insect pests. As a contemplation, the feeding pattern of the brown plant hopper, Nilaparvata lugens Stål on susceptible and resistant rice cultivars and their growth rates exposed to elevated CO2 conditions were analyzed. The elevated CO2 treatment showed significant differences in percentage of emergence and rice biomass that were consistent across the rice cultivars, when compared to the ambient conditions. Similarly, increase in carbon and nitrogen ratio of leaves and alterations in defensive peroxidase enzyme levels were observed, but was non-linear among the cultivars tested. Lower survivorship and nutritional indices of N. lugens were observed in conditions of elevated CO2 levels over ambient conditions. Results were nonlinear in manner. We conclude that the plant carbon accumulation increased due to elevated CO2, causing physiological changes that decreased nitrogen content. Similarly, elevated CO2 increased insect feeding, but did not alter other variables such as their biology or reproduction.

scholarly journals Use of Partial Host Resistance in the Management of Bacterial Blight of Rice

Plant Disease ◽  
1999 ◽  
Vol 83 (10) ◽  
pp. 896-901 ◽  
Author(s):  
Tika B. Adhikari ◽  
Anil Shrestha ◽  
Ram Chandra Basnyat ◽  
T. W. Mew
Keyword(s):  
Partial Resistance ◽  
Bacterial Blight ◽  
Yield Loss ◽  
Severe Disease ◽  
Rice Production ◽  
Lowland Rice ◽  
Rice Cultivars ◽  
Production Environment ◽  
Pooled Data ◽  
Progress Curve

The progress of bacterial blight epidemics, caused by Xanthomonas oryzae pv. oryzae, varies with environment. The irrigated lowland rice production environment in central Terai (plain) is less conducive to the disease than the irrigated lowland rice production environment in eastern Terai in Nepal. The effect of partial resistance on bacterial blight was studied in central Terai during the wet seasons of 1994, 1995, and 1996. Three partially resistant rice cultivars, Sabitri, Laxmi, and IR54 (possessing the Xa4 gene), and susceptible check IR24 were included in this study. Analysis of pooled data from the 3 years of experiments indicated that rice cultivars differed in resistance based on three epidemiological parameters: disease severity (DS), area under the disease progress curve (AUDPC), and rate of disease increase (r). Estimates of DS, AUDPC, and r were reduced and yield loss was negligible in the partially resistant cultivar Laxmi compared with the susceptible check IR24. IR54, which has partial resistance to X. oryzae pv. oryzae, also showed low DS, AUDPC, and r, which prevented yield loss due to bacterial blight. The locally adapted cultivar Sabitri showed intermediate estimates of DS, AUDPC, r, and yield loss. Earlier and more severe disease developed in the susceptible check IR24, resulting in a yield loss of 22%. Yield losses were mainly due to reductions in number of tillers, number of grains per panicle, and 1,000-grain weight. These data indicate that the use of rice cultivars with high levels of partial resistance will be an effective tool for the management of bacterial blight in central Terai and similar environments in Nepal.

scholarly journals Genotypic and phenotypic dissection of Xanthomonas oryzae pv. oryzae on Indica rice cultivars for bacterial blight resistance

2021 ◽  
Vol 42 (6) ◽  
pp. 1578-1590
Author(s):  
J. Kumar ◽  
◽  
A. Hussain ◽  
P. Singh ◽  
S.K.Y. Baksh ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Bacterial Blight ◽  
Indica Rice ◽  
R Gene ◽  
Rice Cultivars ◽  
Eastern India ◽  
Gene Combination ◽  
North Eastern ◽  
North Eastern India ◽  
Blight Disease

Aim: To evaluate the level of virulence of different Xoo isolates/ pathotypes of Eastern and North-eastern India and to identify the suitable donors in rice cultivars having various R-gene combination against virulent Xoo races of Bacterial Blight disease of rice. Methodology: Thirty six Xoo isolates were collected from different places of Eastern and North-eastern India and genetic diversity/ similarity was examined by genotyping of pathotypes using JEL1/JEL2 markers. The 34 Indica rice cultivars carrying different R-gene combination were selected and grown in net house and inoculated artificially with Xoo inoculants from these races/ isolates bacterial of blight disease. Results: The selected 36 Xoo isolates of Eastern and North-eastern India were grouped into seven different isolates/ races based on their genetic diversity using JEL1/JEL2 markers. Among 34 Indica rice cultivars, three or more R-gene combination (xa5 + xa13 + Xa21 and/or Xa4 + xa5 + xa13 + Xa21) cultivars exhibited highly resistant as compared to cultivars with single and double gene combination cultivars against most of the Xoo isolates/ races. Interpretation: The cultivars may determine different level of resistance due to complementary effect of inheritance of suitable R-gene combination. Identified donors may be used for rice resistance breeding programme for Eastern and North-eastern India.

scholarly journals Genetic Analysis of Myanmer Rice Cultivars for Resistance to Bacterial Blight.

1992 ◽  
Vol 42 (2) ◽  
pp. 341-352
Author(s):  
Noboru ENDO ◽  
Tsugufumi OGAWA ◽  
Gurdev. S. KHUSH
Keyword(s):  
Genetic Analysis ◽  
Bacterial Blight ◽  
Rice Cultivars

scholarly journals Grouping of Rice Cultivars based on Reaction Pattern to Philippine Races of Bacterial Blight Pathogen (Xanthomonas campestris pv. oryzae)

1991 ◽  
Vol 41 (1) ◽  
pp. 109-119 ◽  
Author(s):  
Tsugufumi OGAWA ◽  
George A. BUSTO ◽  
Jr.Rodante E. TABIEN ◽  
Gabriel.O. ROMERO ◽  
Noboru ENDO ◽  
...  
Keyword(s):  
Bacterial Blight ◽  
Xanthomonas Campestris ◽  
Reaction Pattern ◽  
Rice Cultivars ◽  
Bacterial Blight Pathogen
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