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Assessing host specialization of B otrytis cinerea on lettuce and tomato by genotypic and phenotypic characterization
Author(s) -
Leyronas C.,
Bryone F.,
Duffaud M.,
Troulet C.,
Nicot P. C.
Publication year - 2015
Publication title -
plant pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.928
H-Index - 85
eISSN - 1365-3059
pISSN - 0032-0862
DOI - 10.1111/ppa.12234
Subject(s) - biology , host (biology) , inoculation , genotype , phenotype , strain (injury) , genetic diversity , botany , horticulture , cultivar , allele , gene , genetics , population , demography , sociology , anatomy
This study tested the hypothesis that B otyrtis cinerea shows host specialization on tomato and lettuce, using phenotypic and genotypic tools. Strains were isolated from tomato and lettuce grown together in the same greenhouse. Forty‐four lettuce strains and 42 tomato strains were investigated for their genetic diversity and their aggressiveness. Both gene diversity and allelic richness were significantly higher in lettuce strains than in tomato strains ( P = 0·01). Cluster analysis revealed a clear division of the strains under study into two clusters. However, this structure did not separate the strains according to their host of origin. Tomato strains were significantly more aggressive than lettuce strains when inoculated on tomatoes ( P = 0·001), but no significant differences in aggressiveness were observed when the strains were inoculated on lettuce ( P = 0·17) or on apple ( P = 0·87). The results suggest an absence of clear host specialization of B . cinerea on tomato and lettuce.