scholarly journals Gene pyramiding for elite tomato genotypes against ToLCV (Begomovirus spp.), late blight (Phytophthora infestans) and RKN (Meloidogyne spp.) for northern India farmers

2019 ◽  
Vol 25 (5) ◽  
pp. 1197-1209 ◽  
Author(s):  
Ashish Kumar ◽  
Salesh Kumar Jindal ◽  
Major Singh Dhaliwal ◽  
Abhishek Sharma ◽  
Sukhjeet Kaur ◽  
...  
Keyword(s):  
Late Blight ◽  
Phytophthora Infestans ◽  
Gene Pyramiding ◽  
Northern India ◽  
Meloidogyne Spp ◽  
Tomato Genotypes

scholarly journals Pathogenic Fitness of Oosporic Progeny Isolates of Phytophthora infestans on Late-Blight-Resistant Tomato Lines

Plant Disease ◽  
2009 ◽  
Vol 93 (9) ◽  
pp. 947-953 ◽  
Author(s):  
Shiri Klarfeld ◽  
Avia (Evgenia) Rubin ◽  
Yigal Cohen
Keyword(s):  
Late Blight ◽  
Phytophthora Infestans ◽  
Field Isolate ◽  
Late Blight Resistance ◽  
The Other ◽  
Host Genotype ◽  
Unit Leaf ◽  
Tomato Genotype ◽  
Different Levels ◽  
Tomato Genotypes

Four A1 field isolates and one A2 field isolate of Phytophthora infestans were crossed to produce oospores in tomato leaves. The oospores were extracted and mixed with perlite and water, and healthy tomato leaves were used as bait for oospore-progeny infection. Twenty-nine lesions were obtained from the four crosses and 283 single-sporangium isolates were recovered and tested on four tomato differential lines carrying different major genes (Ph-0, Ph-1, Ph-2, and 3707) for late blight resistance. The pathogenic fitness (number of sporangia per unit leaf area) of parental and progeny isolates was strongly dependent on the host genotype; it decreased in the order Ph-0 > Ph-1 > Ph-2 > 3707. The A2 parent had a higher pathogenic fitness than the A1 parents on Ph-0 and Ph-1 but similar, lower fitness on Ph-2. Different levels of pathogenic fitness were observed across all isolates on Ph-0, although Ph-0 lacks resistance genes. Pathogenic fitness on one tomato genotype was not related to the pathogenic fitness on the other tomato genotypes. Some isolates exhibited reduced pathogenic fitness relative to the respective A1 parent, whereas others demonstrated a higher pathogenic fitness compared with the A2 parent. The tomato genotype Solanum pimpinellifolium L3707/5 was resistant to all five parental isolates of P. infestans. However, 37 of the 283 progeny isolates from 11 different lesions had compatible reactions with this line, producing up to 31 × 103 sporangia/cm2. Overall, reduced fitness was more frequent among the progeny isolates than increased fitness.

scholarly journals Response of An R Gene Pyramided Potato Genotype to Infection With Phytophthora Infestans

2011 ◽  
Vol 68 (1) ◽  
Author(s):  
Abdelmoumen TAOUTAOU ◽  
Carmen SOCACIU ◽  
Doru PAMFIL ◽  
Erika BALAZS ◽  
Constantin BOTEZ
Keyword(s):  
Late Blight ◽  
Phytophthora Infestans ◽  
Gene Pyramiding ◽  
Resistance Breeding ◽  
R Gene ◽  
Potato Disease ◽  
Suitable Solution ◽  
Potato Genotype ◽  
Late Blight Disease ◽  
Blight Disease

Phytophthora infestans is the most important potato disease. It is a hemibiotrophic pathogen, with a high evolution capacity. Resistance breeding is thought to be the most suitable solution. Gene pyramiding is advanced as a solution for late blight disease.

Discerning strains of Phytophthora infestans the causative agent of potato late blight by SSCP analysis of virulence genes

2018 ◽  
Vol 34 (6) ◽  
pp. 4-11
Author(s):  
V.K. Chizhik ◽  
◽  
E.A. Sokolova ◽  
V.V. Martynov ◽  
M.A. Kuznetsova ◽  
...  
Keyword(s):  
Late Blight ◽  
Phytophthora Infestans ◽  
Causative Agent ◽  
Virulence Genes ◽  
Potato Late Blight ◽  
Sscp Analysis

Spatial modeling increases accuracy of selection for Phytophthora infestans resistant tomato genotypes

Crop Science ◽  
2021 ◽  
Author(s):  
Mariane Gonçalves Ferreira Copati ◽  
Felipe de Oliveira Dias ◽  
João Romero Amaral Santos de Carval Rocha ◽  
Herika Paula Pessoa ◽  
Gabriella Queiroz Almeida
Keyword(s):  
Phytophthora Infestans ◽  
Spatial Modeling ◽  
Selection For ◽  
Tomato Genotypes

Evaluation of bio-agents and neem based products against late blight disease (Phytophthora infestans) of potato

2021 ◽  
Vol 74 (1) ◽  
pp. 181-187
Author(s):  
Mehi Lal ◽  
Sorabh Chaudhary ◽  
Sanjay Rawal ◽  
Sanjeev Sharma ◽  
Manoj Kumar ◽  
...  
Keyword(s):  
Late Blight ◽  
Phytophthora Infestans ◽  
Late Blight Disease ◽  
Blight Disease

scholarly journals Identification of the Dominant Genotypes of Phytophthora infestans in Canada Using Real-Time PCR with ASO-PCR Assays

Plant Disease ◽  
2016 ◽  
Vol 100 (7) ◽  
pp. 1482-1491 ◽  
Author(s):  
Marie-Claude Gagnon ◽  
Lawrence Kawchuk ◽  
D. Mathieu Tremblay ◽  
Odile Carisse ◽  
Giovanna Danies ◽  
...  
Keyword(s):  
Late Blight ◽  
Phytophthora Infestans ◽  
Rapid Assessment ◽  
Nucleotide Polymorphisms ◽  
Blind Test ◽  
Phytophthora Spp ◽  
Allele Specific ◽  
Flanking Sequences ◽  
Pcr Assays ◽  
And Control

Phytophthora infestans, a pathogenic oomycete that is the causal agent of potato and tomato late blight, has devastating effects worldwide. The genetic composition of P. infestans populations in Canada has changed considerably over the last few years, with the appearance of several new genotypes showing different mating types and sensitivity to the fungicide metalaxyl. Genetic markers allowing for a rapid assessment of genotypes from small amounts of biological material would be beneficial for the early detection and control of this pathogen throughout Canada. Mining of the P. infestans genome revealed several regions containing single-nucleotide polymorphisms (SNP) within both nuclear genes and flanking sequences of microsatellite loci. Allele-specific oligonucleotide polymerase chain reaction (ASO-PCR) assays were developed from 14 of the 50 SNP found by sequencing. Nine optimized ASO-PCR assays were validated using a blind test comprising P. infestans and other Phytophthora spp. The assays revealed diagnostic profiles unique to each of the five dominant genotypes present in Canada. The markers developed in this study can be used with environmental samples such as infected leaves, and will contribute to the genomic toolbox available to assess the genetic diversity of P. infestans at the intraspecific level. For late blight management, early warning about P. infestans genotypes present in potato and tomato fields will help growers select the most appropriate fungicides and application strategies.

scholarly journals Modeling of Yield Losses Caused by Potato Late Blight on Eight Cultivars with Different Levels of Resistance to Phytophthora infestans

Plant Disease ◽  
2012 ◽  
Vol 96 (7) ◽  
pp. 935-942 ◽  
Author(s):  
Toky Rakotonindraina ◽  
Jean-Éric Chauvin ◽  
Roland Pellé ◽  
Robert Faivre ◽  
Catherine Chatot ◽  
...  
Keyword(s):  
Late Blight ◽  
Phytophthora Infestans ◽  
Relative Yield ◽  
Weather Conditions ◽  
Potato Late Blight ◽  
Yield Losses ◽  
Predictive Quality ◽  
Wide Range ◽  
Cultivar Susceptibility

The Shtienberg model for predicting yield loss caused by Phytophthora infestans in potato was developed and parameterized in the 1990s in North America. The predictive quality of this model was evaluated in France for a wide range of epidemics under different soil and weather conditions and on cultivars different than those used to estimate its parameters. A field experiment was carried out in 2006, 2007, 2008, and 2009 in Brittany, western France to assess late blight severity and yield losses. The dynamics of late blight were monitored on eight cultivars with varying types and levels of resistance. The model correctly predicted relative yield losses (efficiency = 0.80, root mean square error of prediction = 13.25%, and bias = –0.36%) as a function of weather and the observed disease dynamics for a wide range of late blight epidemics. In addition to the evaluation of the predictive quality of the model, this article provides a dataset that describes the development of various late blight epidemics on potato as a function of weather conditions, fungicide regimes, and cultivar susceptibility. Following this evaluation, the Shtienberg model can be used with confidence in research and development programs to better manage potato late blight in France.

Performance of Dimethomorph + Mancozeb Applied to Seed Potatoes in Early Management of Late Blight (Phytophthora infestans)

2007 ◽  
Vol 50 (1) ◽  
pp. 59-70 ◽  
Author(s):  
D. O. Caldiz ◽  
D. A. Rolon ◽  
J. Di Rico ◽  
A. B. Andreu
Keyword(s):  
Late Blight ◽  
Phytophthora Infestans ◽  
Early Management ◽  
Seed Potatoes

scholarly journals Complete mitogenome mapping of potato late blight pathogen, Phytophthora infestans A2 mating type

2017 ◽  
Vol 2 (1) ◽  
pp. 90-91
Author(s):  
Virupaksh U. Patil ◽  
G. Vanishree ◽  
Debasis Pattanayak ◽  
Sanjeev Sharma ◽  
Vinay Bhardwaj ◽  
...  
Keyword(s):  
Late Blight ◽  
Phytophthora Infestans ◽  
Mating Type ◽  
Potato Late Blight ◽  
Complete Mitogenome ◽  
Late Blight Pathogen

scholarly journals The 2009 Late Blight Pandemic in the Eastern United States – Causes and Results

Plant Disease ◽  
2013 ◽  
Vol 97 (3) ◽  
pp. 296-306 ◽  
Author(s):  
W. E. Fry ◽  
M. T. McGrath ◽  
A. Seaman ◽  
T. A. Zitter ◽  
A. McLeod ◽  
...  
Keyword(s):  
United States ◽  
Late Blight ◽  
Phytophthora Infestans ◽  
Current Situation ◽  
Causal Agent ◽  
Community Supported Agriculture ◽  
Eastern United States ◽  
Tomato Crop ◽  
History Of ◽  
Mainstream Press

The tomato late blight pandemic of 2009 made late blight into a household term in much of the eastern United States. Many home gardeners and many organic producers lost most if not all of their tomato crop, and their experiences were reported in the mainstream press. Some CSAs (Community Supported Agriculture) could not provide tomatoes to their members. In response, many questions emerged: How did it happen? What was unusual about this event compared to previous late blight epidemics? What is the current situation in 2012 and what can be done? It's easiest to answer these questions, and to understand the recent epidemics of late blight, if one knows a bit of the history of the disease and the biology of the causal agent, Phytophthora infestans.

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