Genetic diversity and inoculum exchange of Botrytis cinerea between tomato greenhouses in northern Algeria

Ahmed Adjebli (1) , Christel Leyronas (2) , Kamel Aissat (1) , Philippe C. Nicot (2)

1 Laboratoire d’écologie Microbienne
2 PV - Unité de Pathologie Végétale

To estimate the genetic diversity for a better understanding of the spread of Botrytis cinerea, we genotyped with nine microsatellite markers 174 isolates collected from four greenhouses during three growing seasons in the region of Bejaia. Four of these isolates were detected as Botrytis pseudocinerea according to the allele size at locus Bc6. For all other isolates further studied, all loci were polymorphic, with the mean number of alleles per locus ranging from 2.77 to 5.22. Considerable genetic variability was detected in all subpopulations (D*>0.87; Hnb>0.40). Based on the standardized index of association analysis, significant but low levels of clonality occurred, not excluding the possibility of recombination (rD= 0.07, P<0.001). A total of 109 haplotypes were characterized among the isolates, few of which were shared between subpopulations. This, together with moderate genetic differentiation among subpopulations according to the geographical origin (0.080

Mots clés: tomato; genêtic variation

Mots clés: botritis cinerea; tomate; pathologie végétale; diversité génétique; Algérie; inoculum aérien; épidémiologie végétale; culture légumière de plein champ; structure génétique des populations; gestion des maladies

Domaines: Phytopathologie et phytopharmacie; Mycologie; Sciences agricoles

Ahmed Adjebli, Christel Leyronas, Kamel Aissat, Philippe C. Nicot. Genetic diversity and inoculum exchange of Botrytis cinerea between tomato greenhouses in northern Algeria. 17. International Botrytis Symposium, Oct 2016, Santa Cruz, Chile. , 2016, Abstract book XVII International Botrytis symposium, 23 - 28 October 2016, Santa cruz - Chile. ⟨hal-01594881⟩