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Somatic incompatibility of Rosellinia necatrix on avocado plants in southern Spain

Published online by Cambridge University Press:  09 May 2002

Rosa M. PÉREZ JIMÉNEZ ,
Rafael M. JIMÉNEZ DÍAZ  and
Carlos J. LÓPEZ HERRERA
Rosa M. PÉREZ JIMÉNEZ
Affiliation:
Centro de Investigación y Formación Agraria, Consejería de Agricultura y Pesca, Junta de Andalucía, 29140 Churriana (Málaga), Spain.
Rafael M. JIMÉNEZ DÍAZ
Affiliation:
Instituto de Agricultura Sostenible, Consejo Superior de Investigaciones Científicas (CSIC), Av. Alameda del Obispo s/n, Apartado 4084, 14080, Córdoba, Spain. Escuela Técnica Superior de Ingenieros Agrónomos y Montes, Universidad de Córdoba, Apartado 3048, 14080 Córdoba, Spain.
Carlos J. LÓPEZ HERRERA
Affiliation:
Instituto de Agricultura Sostenible, Consejo Superior de Investigaciones Científicas (CSIC), Av. Alameda del Obispo s/n, Apartado 4084, 14080, Córdoba, Spain.
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Abstract

A somatic incompatibility system was demonstrated in Rosellinia necatrix (anamorph Dematophora necatrix) through barrage formation in pairings among mass fungal isolates from infected avocado trees in commercial orchards in southern Spain, as well as among single ascospore isolates derived from perithecia formed in infected roots. Results revealed the occurrence of high diversity in somatic incompatibility in the R. necatrix population in the study. The occurrence of R. necatrix perithecia in naturally infected avocado roots in the field suggests that such a diversity might originate from sexual reproduction. However, the possibility that other parasexual mechanisms demonstrated in this fungus may contribute to the genetic diversity can not be discounted.

Type
Research Article
Information
Mycological Research , Volume 106 , Issue 2 , February 2002 , pp. 239 - 244
Copyright
© The British Mycological Society 2002

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