Mating-type loci segregate aberrantly in Phytophthora infestans but normally in Phytophthora parasitica: implications for models of mating-type determination

1997 ◽  
Vol 32 (1) ◽  
pp. 60-65 ◽  
Author(s):  
Anna-Liisa Fabritius ◽  
H. S. Judelson
Keyword(s):  
Phytophthora Infestans ◽  
Mating Type ◽  
Phytophthora Parasitica

GENETIC VARIABILITY STUDY OF Phytophthora infestans ISOLATES BASED ON MATING TYPE MOLECULAR MARKERS AND METALAXYL RESISTANCE

2012 ◽  
Vol 3 (3) ◽  
pp. 227-238
Author(s):  
Mona Ragab ◽  
M. Mostafa ◽  
S. Abdel-Momen ◽  
Marwa Ismail
Keyword(s):  
Molecular Markers ◽  
Genetic Variability ◽  
Phytophthora Infestans ◽  
Mating Type ◽  
Metalaxyl Resistance ◽  
Variability Study

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

Chemical Regulation of Mating Type in Phytophthora parasitica

Mycologia ◽  
1986 ◽  
Vol 78 (1) ◽  
pp. 134 ◽  
Author(s):  
W. H. Ko ◽  
C. J. Lee ◽  
H. J. Su
Keyword(s):  
Mating Type ◽  
Phytophthora Parasitica ◽  
Chemical Regulation

scholarly journals Phytophthora infestans Mating Types on Tomato (Solanum lycopersicum) in Southern Spain

Plant Disease ◽  
2007 ◽  
Vol 91 (1) ◽  
pp. 109-109 ◽  
Author(s):  
J. M. Segura ◽  
M. de Cara ◽  
M. Santos ◽  
J. Tello
Keyword(s):  
Phytophthora Infestans ◽  
Mating Type ◽  
Agar Medium ◽  
The Other ◽  
Southern Spain ◽  
White Mold ◽  
Mating Types ◽  
Tomato Plants ◽  
Cornell University ◽  
Tomato Seeds

During 2004, an unusual spread of Phytophthora infestans on tomato plants in greenhouses located in Almería and Granada provinces, southern Spain, was observed. Infected plants had water-soaked, brown spots on leaves and stems and necrotic areas with white mold on the surface of fruits. Three isolates were obtained by plating diseased tissue on V8 juice agar medium and maintained on rye agar at 18°C. These isolates were analyzed for the mating type. Crosses were carried out using V8 juice agar and rye agar. The two parental isolates US1 (A1) and US8 (A2) were both provided by W. E. Fry, Cornell University, Ithaca, NY. Two of the Spanish isolates were homothallic and the other isolate belonged to the uncommon mating type A1A2. To confirm the occurrence of the two mating types, 43 single-sporangium progeny were produced and analyzed from the A1A2 mating type. Thirty eight isolates were A1, two were A2, one was A1A2 mating type, and two were sterile. Assessment of five single-sporangium progeny from the homothallic type resulted in two A1, two homothallic, and one sterile isolate. A1A2 isolates produced oospores when crossed with either A1 or A2, but not when self-crossed. Previously, the A1A2 mating type has been found in Israel in the field and was obtained from oospores produced on tomato seeds (2,3). Since 2003, mating types of P. infestans isolates recovered from potato (60) and tomato (8) in southern Spain have been characterized. Seventy-five percent of the isolates recovered from potato were A1 and 25% were A2 mating types. Isolates recovered from tomato were 50% A1 and 50% A2 (1). To our knowledge, this is the first report of the occurrence of the A1A2 mating type and homothallic P. infestans isolates on tomato in Spain. References: (1) E. Andujar et al. Congr. Sociedad Española de Fitopatol. 12:244, 2004. (2) E. Rubin and Y. Cohen. Phytoparasitica 32:237, 2004. (3) E. Rubin and Y. Cohen. Plant Dis. 90:741, 2006.

Strains of Phytophthora infestans from Switzerland with A2 mating type behaviour

1984 ◽  
Vol 83 (3) ◽  
pp. 529-530 ◽  
Author(s):  
Hans R. Hohl ◽  
Katja Iselin
Keyword(s):  
Phytophthora Infestans ◽  
Mating Type

Phytophthora infestans mating type A2. [Distribution map].

1996 ◽  
Author(s):  
Keyword(s):  
North Carolina ◽  
Northern Ireland ◽  
Phytophthora Infestans ◽  
Mating Type ◽  
West Bengal ◽  
Russian Far East ◽  
Far East ◽  
Distribution Map ◽  
East Siberia ◽  
New Distribution

Abstract A new distribution map is provided for Phytophthora infestans (Mont.) de Bary mating type A2. Hosts: Potato (Solanum tuberosum), tomato (Lycopersicon esculentum) and others. Information is given on the geographical distribution in Canada, British Columbia, Egypt, Estonia, France, Mainland France, Germany, India, Himachal Pradesh, Meghalaya, West Bengal, Indonesia, Ireland, Israel, Japan, Korea Republic, Mexico, Netherlands, Poland, Russia, Russia (European), Russian Far East, Siberia, Switzerland, UK, England and Wales, Northern Ireland, Scotland, USA, Florida, North Carolina, Pennsylvania, Texas, Washington.

Genetic mapping and non-Mendelian segregation of mating type loci in the oomycete, Phytophthora infestans.

Genetics ◽  
1995 ◽  
Vol 141 (2) ◽  
pp. 503-512 ◽  
Author(s):  
H S Judelson ◽  
L J Spielman ◽  
R C Shattock
Keyword(s):  
Phytophthora Infestans ◽  
Mating Type ◽  
Dna Markers ◽  
Bulked Segregant Analysis ◽  
Random Amplified Polymorphic Dna ◽  
Mating Types ◽  
Mendelian Segregation ◽  
Range Restriction ◽  
Type Locus ◽  
Mating Type Locus

Abstract DNA markers linked to the determinants of mating type in the oomycete, Phytophthora infestans, were identified and used to address the genetic basis of heterothallism in the normally diploid fungus. Thirteen loci linked to the A1 and A2 mating types were initially identified by bulked segregant analysis using random amplified polymorphic DNA markers (RAPDs) and subsequently scored in three crosses polymorphisms (SSCP), cleaved amplified polymorphisms (CAPS), or allele-specific polymerase chain reaction markers (AS-PCR). All DNA markers mapped to a single region, consistent with a single locus determining both mating types. Long-range restriction mapping also demonstrated the linkage of the markers to one region and delimited the mating type locus to a 100-kb region. The interval containing the mating type locus displayed non-Mendelian segregation as only two of the four expected genotypes were detected in progeny. This is consistent with a system of balance lethal loci near the mating type locus. A model for mating type determination is presented in which the balanced lethals exclude form progeny those with potentially conflicting combinations of mating type alleles, such as those simultaneously expressing A1 and A2 functions.

scholarly journals Analysis of the lineage of Phytophthora infestans isolates using mating type assay, traditional markers, and next generation sequencing technologies

PLoS ONE ◽  
2020 ◽  
Vol 15 (1) ◽  
pp. e0221604
Author(s):  
Ramadan A. Arafa ◽  
Said M. Kamel ◽  
Mohamed T. Rakha ◽  
Nour Elden K. Soliman ◽  
Olfat M. Moussa ◽  
...  
Keyword(s):  
Next Generation Sequencing ◽  
Phytophthora Infestans ◽  
Mating Type ◽  
Next Generation ◽  
Sequencing Technologies ◽  
Generation Sequencing

scholarly journals Occurrence and distribution of mating types A1 and A2 of Phytophthora infestans (Mont.) de Bary in the Czech Republic

2010 ◽  
Vol 42 (No. 2) ◽  
pp. 41-48 ◽  
Author(s):  
J. Mazáková ◽  
V. Táborský ◽  
M. Zouhar ◽  
P. Ryšánek ◽  
E. Hausvater ◽  
...  
Keyword(s):  
Czech Republic ◽  
Phytophthora Infestans ◽  
Mating Type ◽  
Mating Types ◽  
Pcr Markers ◽  
The Czech Republic ◽  
First Report

A total of 199 <i>Phytophthora infestans</i> isolates were obtained from leaves, tubers and fruits of infected crops of potato and tomato in different regions of the Czech Republic in 2003, 2004 and 2005. They were analysed for mating type using the conventional pairing assay and PCR markers; 107 isolates were of A1 and 92 of A2 mating type. No self-fertile isolate was found. Our study is the first report of the presence and distribution of the A2 mating type of <i>P. infestans</i> in the Czech Republic. The co-existence of the two mating types may enable the pathogen to reproduce sexually, thus enhancing the diversity of its population countrywide.

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