Acta Phytopathologica et Entomologica Hungarica
Volume/Issue:
Volume 37: Issue 1-3
Characterization of parental traits in somatic fusion progeny of Phytophthora infestans
Authors: J. Bakonyi 1 , M. Láday 2 , and T. Érsek 3
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  • 1 Plant Protection Institute, Hungarian Academy of Sciences, H-1525 Budapest, P.O. Box 102, Hungary
  • 2 Plant Protection Institute, Hungarian Academy of Sciences, H-1525 Budapest, P.O. Box 102, Hungary
  • 3 Plant Protection Institute, Hungarian Academy of Sciences, H-1525 Budapest, P.O. Box 102, Hungary
DOI:
https://doi.org/10.1556/aphyt.37.2002.1-3.5
Page Count:
33–46
Publication Date:
01 Jun 2002
Online Publication Date:
22 Jul 2005
Article Category:
Research Article
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Species hybrids were created via fusion of zoospores of two morpho­logically distinct species, P. infestans and P. nicotianae. Sixteen putative hybrid isolates were recovered that expressed differential drug resistance of each parent. Repetitive DNA of P. nicotiane was detected readily in all of these isolates by hybridization with the species-specific DNA probe, pPP33A. DNA of P. infestans was detected in only two putative hybrid isolates using PCR and primer pair ITS3 and PINF2. The two true hybrids were more similar to P. nicotianae than to P. infestans on the basis of pathogenic, morphological and molecular evidence. Additionally, hybrids expressed modified host ranges compared to parental species. Fusion of zoospores or hyphae may contribute to formation of such hybrids, particularly in the case of heterothallic species in which the joint occurrence of compatible mating types is rare. Zoospore fusion may prove useful as a tool to study hybridization, pathogenesis, and sources of natural diversity of species.

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Cover Acta Phytopathologica et Entomologica Hungarica
Acta Phytopathologica et Entomologica Hungarica
Print ISSN:
0238-1249
Online ISSN:
1588-2691
Keywords:
phytophthora spp.; phytophthora spp.; interspecific hybrids; zoospore fusion

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