scholarly journals Physiological, Ecological and Genetic Interactions of Rice with Harmful Microbes

2021 ◽  
Author(s):  
Yulin Jia ◽  
Melissa H. Jia
Keyword(s):  
Innate Immunity ◽  
Resistance Genes ◽  
Host Resistance ◽  
Wild Rice ◽  
Rice Blast ◽  
Life Sciences ◽  
Genetic Interactions ◽  
Ecological Aspects ◽  
Weedy Species ◽  
Rice Pathogens

Rice is one of the most important food crops for mankind and suffers significant crop loss annually due to rice diseases. Availability of genome sequences of rice has served as a springboard to utilize its innate immunity to prevent rice diseases. Knowledge on interactions of rice and rice pathogens has rapidly accumulated. Effective resistance genes have been identified from cultivated, weedy species of rice, and wild rice relatives and their roles in plant innate immunity have been uncovered. Presently, rice diseases are being managed using host resistance genes and pesticides in diverse culture systems around the globe. This chapter presents a simple review of interactions of rice with harmful microbes causing the two major damaging diseases, rice blast and sheath blight. The review is written to target new readers in life sciences. Knowledge and critical literatures on physiological, genetic, and ecological aspects of host-pathogen interactions are presented to gain insights leading to sustainable disease management systems.

scholarly journals Dissection of broad-spectrum resistance of the Thai rice variety Jao Hom Nin conferred by two resistance genes against rice blast

Rice ◽  
2017 ◽  
Vol 10 (1) ◽  
Author(s):  
Chaivarakun Chaipanya ◽  
Mary Jeanie Telebanco-Yanoria ◽  
Berlaine Quime ◽  
Apinya Longya ◽  
Siripar Korinsak ◽  
...  
Keyword(s):  
Resistance Genes ◽  
Broad Spectrum ◽  
Rice Blast ◽  
Rice Variety ◽  
Broad Spectrum Resistance

Expression-based genotyping of the rice blast resistance genes in the elite maintainer line Yixiang1B

2017 ◽  
Vol 148 (4) ◽  
pp. 955-965 ◽  
Author(s):  
Li Wang ◽  
Xiao-Hong Hu ◽  
Gang Lin ◽  
De-Ming Zhao ◽  
Jun Shi ◽  
...  
Keyword(s):  
Resistance Genes ◽  
Rice Blast ◽  
Blast Resistance ◽  
Maintainer Line ◽  
Rice Blast Resistance ◽  
Blast Resistance Genes

scholarly journals Resistance spectra of six elite breeding lines of upland rice to Pyricularia grisea

2003 ◽  
Vol 38 (2) ◽  
pp. 203-210 ◽  
Author(s):  
Anne Sitarama Prabhu ◽  
Emílio da Maia de Castro ◽  
Leila Garcês de Araújo ◽  
Rodrigo Fascin Berni
Keyword(s):  
Resistance Genes ◽  
Rice Blast ◽  
Grain Quality ◽  
Upland Rice ◽  
Pyricularia Grisea ◽  
Rice Cultivars ◽  
Breeding Lines ◽  
Differential Reaction ◽  
Progress Curve ◽  
Elite Breeding Lines

The objective of this work was to evaluate the resistance spectra of six elite breeding lines of rice, developed for improved yield and grain quality, in inoculation tests in the greenhouse and in the field. Forty-six isolates of Pyricularia grisea collected from the cultivar Primavera, 31 from the cultivar Maravilha and 19 from six elite breeding lines, totaling 96 were utilized for inoculations. Out of 11 international and 15 Brazilian pathotypes, IC-1, IB-9, and BD-16, respectively, were identified as most frequent isolates collected from the cultivar Primavera. The isolates retrieved from Maravilha belong to four international and 11 Brazilian pathotypes, the predominant ones being IB-9 and IB-49 and BB-1 and BB-21, respectively. Lines CNAs 8711 and CNAs 8983 showed resistant reaction to all test isolates from Maravilha, while CNAs 8983 was susceptible to three isolates of Primavera pertaining to the pathotype IC-1. A majority of isolates exhibiting compatible reaction to Primavera were incompatible to Maravilha and vice-versa.Field assessment of rice blast utilizing the area under disease progress curve as a criterion for measuring disease severity showed significant differences among the six breeding lines. The isolates of P. grisea exhibiting differential reaction on breeding lines can be utilized in pyramiding resistance genes in new upland rice cultivars.

scholarly journals Screening of the Dominant Rice Blast Resistance Genes with PCR-based SNP and CAPS Marker in Aromatic Rice Germplasm

2011 ◽  
Vol 56 (4) ◽  
pp. 329-341 ◽  
Author(s):  
Jeong-Soon Kim ◽  
Sang-Nag Ahn ◽  
Sung-Jun Hong ◽  
Jin-Hyeuk Kwon ◽  
Yeong-Ki Kim ◽  
...  
Keyword(s):  
Resistance Genes ◽  
Rice Blast ◽  
Blast Resistance ◽  
Aromatic Rice ◽  
Caps Marker ◽  
Rice Blast Resistance ◽  
Rice Germplasm ◽  
Blast Resistance Genes

scholarly journals Innate Immunity and Inflammation in Sepsis: Mechanisms of Suppressed Host Resistance in Mice Treated with Ethanol in a Binge-Drinking Model

2010 ◽  
Vol 117 (2) ◽  
pp. 314-324 ◽  
Author(s):  
Stephen B. Pruett ◽  
Ruping Fan ◽  
Bing Cheng ◽  
Mitzi Glover ◽  
Wei Tan ◽  
...  
Keyword(s):  
Innate Immunity ◽  
Binge Drinking ◽  
Host Resistance

scholarly journals Identification of rice blast (Pyricularia) resistance genes in the breeding samples of rice

2020 ◽  
Vol 175 ◽  
pp. 01008
Author(s):  
Nataliya Vozhzhova ◽  
Elena Krasnova ◽  
Elena Ionova
Keyword(s):  
Resistance Genes ◽  
Rice Blast ◽  
Agricultural Research ◽  
Blast Resistance ◽  
Genetic Material ◽  
Climatic Conditions ◽  
Rice Blast Resistance ◽  
Rice Samples ◽  
Functional Alleles ◽  
Blast Resistance Genes

The current paper has considered the challenge of breeding of rice lines adapted to the climatic conditions of the Southern Federal District of Russia by pyramiding a complex of Pi-1, Pi-2, Pi-33, Pi-ta and Pi-b rice blast resistance genes which is efficient in the southern part of Russia. The control of the resistance genes present in the breeding material was carried out using a marker-associated selection (MAS). The purpose of the current study was to identify the Pi-1, Pi-2, Pi-33, Pi-ta, and Pi-b rice blast resistance genes in the rice samples developed in the laboratory of rice breeding and seed production of the FSBSI “Agricultural Research Center “Donskoy” to identify valuable genotypes. The screening of 689 breeding samples of rice resulted in identification of the allelic state of the Pi-1, Pi-2, Pi-33, Pi-ta and Pi-b rice blast resistance genes, and the genotypes with functional alleles of these genes and their combinations. There were identified 19 breeding samples of rice possessing a combination of 4 functional alleles of rice blast resistance genes in various combinations. The identified rice samples are valuable genetic material and are recommended to use as the sources of rice blast resistance in the breeding process.

Dynamics of the rice blast fungal population in the field after deployment of an improved rice variety containing known resistance genes

Plant Disease ◽  
2020 ◽  
Author(s):  
Wenjuan Wang ◽  
Jing Su ◽  
Kailing Chen ◽  
Jianyuan Yang ◽  
Shen Chen ◽  
...  
Keyword(s):  
Disease Resistance ◽  
Resistance Genes ◽  
Rice Blast ◽  
Rice Variety ◽  
Field Population ◽  
Pcr Analysis ◽  
Resistant Variety ◽  
Pathogenicity Test ◽  
Line Field ◽  
Isogenic Lines

Rice blast, caused by the fungus Magnaporthe oryzae, is one of the most destructive diseases of rice worldwide. Management through the deployment of host resistance genes would be facilitated by understanding the dynamics of the pathogen’s population in the field. Here, to investigate the mechanism underlying the breakdown of disease resistance, we conducted a six-year field experiment to monitor the evolution of M. oryzae populations in Qujiang from Guangdong. The new variety of XYZ carrying R genes Pi50 and Pib was developed using the susceptible elite variety, MBYZ, as the recurrent line. Field trails of disease resistance assessment revealed that the disease indices of XYZ in 2012, 2013, 2016, and 2017 were 0.19, 0.39, 0.70, and 0.90, respectively, indicating that XYZ displayed a very rapid increase of disease severity in the field. To investigate the mechanism underlying the quick erosion of resistance of XYZ, we collected isolates from both XYZ and MBYZ for pathogenicity test against 6 different isogenic lines. The isolates collected from XYZ showed a similar virulence spectrum across 4 different years whereas those from MBYZ showed increasing virulence to the Pi50 and Pib isogenic lines from 2012 to 2017. Molecular analysis of AvrPib in the isolates from MBYZ identified four different AvrPib haplotypes, i.e., AvrPib-AP1-1, AvrPib-AP1-2, avrPib-AP2, and avrPib-AP3, verified by sequencing. AvrPib-AP1-1 and AvrPib-AP1-2 are avirulent to Pib whereas avrPib-AP2 and avrPib-AP3 are virulent. Insertions of a Pot3 and an Mg-SINE were identified in avrPib-AP2 and avrPib-AP3, respectively. Two major lineages based on rep-PCR analysis were further deduced in the field population, implying that the field population is composed of genetically related isolates. Our data suggest that clonal propagation and quick dominancy of virulent isolates against the previously resistant variety could be the major genetic events contributing to the loss of varietal resistance against rice blast in the field.

scholarly journals Diversity and Distribution of Rice Blast (Pyricularia oryzae Cavara) Races in Vietnam

Plant Disease ◽  
2020 ◽  
Vol 104 (2) ◽  
pp. 381-387 ◽  
Author(s):  
Nguyen T. M. Nguyet ◽  
Hoang H. Long ◽  
Nguyen B. Ngoc ◽  
Nguyen T Nhai ◽  
Nguyen T. T. Thuy ◽  
...  
Keyword(s):  
Resistance Genes ◽  
Rice Blast ◽  
Pyricularia Oryzae ◽  
Red River ◽  
Red River Delta ◽  
North Central ◽  
South Central ◽  
Central Vietnam ◽  
Differential Varieties ◽  
Reaction Patterns

A total of 239 isolates of blast (Pyricularia oryzae Cavara) collected from northern and central Vietnam showed a wide variation in pathogenicity based on the reaction patterns to 25 differential varieties (DVs) harboring 23 resistance genes and susceptible cultivar Lijiangxintuanheigu (LTH). The frequencies of isolates virulent toward DVs for Pish, Pik-m, Pi1, Pik-h, Pik, Pik-p, Pi7(t), Pi9(t), Piz-5, Pita-2, and Pita were low, but they were high for DVs for Pib, Pit, Pia, Pii, Pi3, Pi5(t), Pik-s, Piz, Piz-t, Pi12(t), Pi19(t), and Pi20(t). Isolates were classified into three cluster groups Ia, Ib, and II based on reaction patterns to DVs and LTH. The frequencies of isolates virulent toward 11 DVs for Pik-m, Pi1, Pik-h, Pik, Pik-p, Pi7(t), Pi9(t), Piz, Piz-5, Pita-2, and Pita in cluster II and DV for Piz-t were higher and lower than those of Ia and Ib, respectively. The frequencies to DVs for Pii, Pi3, Pi5(t), and Piz-t were different between clusters Ia and Ib. Clusters Ia and Ib were distributed with similar frequencies in the northeast, north central, and south central coast regions, but the frequencies among three cluster groups in the Red River Delta and northwest regions were different. This means that the blast races in these two regions were different from the others. Overall, the blast isolates were categorized into 153 races. Among them, 26 were selected as a set of standard differential blast isolates for characterizing 23 resistance genes and developing a differential system in Vietnam.

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