University of Worcester Worcester Research and Publications
 
  USER PANEL:
  ABOUT THE COLLECTION:
  CONTACT DETAILS:

Phenotypic and Genotypic Variation in the Interaction between Arabidopsls thaliana and Albugo candida

Holub, E.B. and Brose, E and Tör, M and Clay, C and Crute, I and Beynon, J (1995) Phenotypic and Genotypic Variation in the Interaction between Arabidopsls thaliana and Albugo candida. Molecular Plant-Microbe Interactions, 8. pp. 214-222. ISSN 0894-0282

Full text not available from this repository. (Request a copy)

Abstract

Two biotrophic parasites of the wild crucifer Arabidopsis thaliana (L.) Heynh. are being used to explore the molecular basis and evolution of genotype-specific recognition and host defense. Genes for recognition of Peronospora parasitica (downy mildew) are numerous in A. thaliana and located on four of the five chromosomes as described previously. Genes for recognition of the closely related parasite Albugo Candida (white blister) are described here. In contrast to the former parasite, less than 15% of the host accessions tested were capable of recognizing either of two isolates of A. Candida. The geographic regions represented by these accessions included countries in eastern and western Europe, Asia, North America and Africa. Extensive collections from England and Germany were required to identify examples of incompatible interactions. Phenotypic variation among incompatible interactions included reduced blister formation or complete lack of asexual reproduction by the parasite. Variation in the extent of the host response was also observed. Three host genes for recognition of A. Candida (RAC), each associated with different interaction phenotypes, were identified through inheritance studies with three accessions. One of these genes at locus RACI appeared to be completely dominant, whereas the other two genes were only partially dominant or recessive under certain conditions, possibly including the effect of genetic background. One of the latter two genes defined a second locus RAC2. RACI was mapped to the top arm of chromosome 1 in the 1 cM interval between RFLP markers M254 and M253.

Item Type: Article
Additional Information:

This is an Open Access article. The full-text can be accessed via the Official URL.

Uncontrolled Keywords: incomplete dominance, Peronosporales, gene-for-gene, genotypic variation
Subjects: Q Science > QK Botany
Q Science > QH Natural history > QH301 Biology
Q Science > QH Natural history > QH426 Genetics
Q Science > QR Microbiology
Divisions: Academic Departments > Institute of Science and the Environment
Research Centres > National Pollen and Aerobiology Research Unit
Depositing User: Janet Davidson
Date Deposited: 19 Jan 2011 20:05
Last Modified: 24 Jul 2012 11:53
URI: https://eprints.worc.ac.uk/id/eprint/1179

Actions (login required)

View Item View Item
 
     
Worcester Research and Publications is powered by EPrints 3 which is developed by the School of Electronics and Computer Science at the University of Southampton. More information and software credits.