Journal of Phytopathology (2007) 155, 549-556

I. Gell, I. Larena and P. Melgarejo (2007)
Genetic diversity in Monilinia laxa populations in peach orchards in Spain
Journal of Phytopathology 155 (9), 549-556
Abstract: One-hundred and forty-four random amplified polymorphic DNA markers, of which 59 were polymorphic and 85 monomorphic, were used to assess the genetic diversity and to study the structure of Monilinia laxa populations in Spain. Twenty-one isolates collected from several orchards (subpopulations), in various years and in various hosts, were used. The analysis of population structure revealed that genetic diversity within orchards (HS) accounted for 97% of the total genetic diversity (HT), while genetic diversity among the orchards represented only 3%. The relative magnitude of gene differentiation between subpopulations (GST) and the estimate of the number of migrants per generation (Nm) averaged 0.032 and 15.1 respectively. The results obtained in dendrograms were in accordance with the gene diversity analysis. Grouping of isolates in the dendrogram was independent of whether they came from the same or different orchards. There was no relationship between clustering among isolates from distinct years and hosts. The relative importance of several evolutionary forces in populations of M. laxa is discussed, together with implications for the management of brown rot.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Paloma Melgarejo

Research topic(s) for pests/diseases/weeds:
molecular biology - genes

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Monilinia laxa/Monilia laxa	Peach/nectarine (Prunus persica)	Spain (continental)