Genetic structure of <Emphasis Type="Italic">Varroa destructor</Emphasis> populations infesting <Emphasis Type="Italic">Apis mellifera</Emphasis> colonies in Argentina |
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Authors: | M Maggi S Medici S Quintana S Ruffinengo J Marcángeli P Gimenez Martinez S Fuselli M Eguaras |
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Institution: | 1.Laboratorio de Artrópodos, Facultad de Ciencias Exactas y Naturales,Universidad Nacional de Mar del Plata,Mar del Plata,Argentina;2.CONICET, Consejo Nacional de Investigaciones Científicas y Técnicas,Buenos Aires,Argentina;3.Fares Taie Instituto de Análisis,Mar del Plata,Argentina;4.Facultad de Ciencias Agrarias,Universidad Nacional de Mar del Plata,Balcarce,Argentina;5.Comisión de Investigaciones Científicas (CIC),La Plata, Buenos Aires,Argentina |
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Abstract: | Although mitochondrial DNA mapping of Varroa destructor revealed the presence of several haplotypes, only two of them (Korean and Japanese haplotypes) were capable to infest Apis mellifera populations. Even though the Korean haplotype is the only one that has been reported in Argentina, these conclusions were
based on mites sampled in apiaries from a specific geographical place (Buenos Aires province). To study mites from several
sites of Argentina could reveal the presence of the Japanese genotype, especially considering sites near to Brazil, where
Japanese haplotype was already detected. The aim of this work was to study the genetic structure of V. destructor populations from apiaries located in various provinces of Argentina, in order to determine the presence of different haplotypes.
The study was carried out between January 2006 and December 2009. Phoretic adult Varroa mites were collected from honey bee workers sampled from colonies of A. mellifera located in Entre Ríos, Buenos Aires, Corrientes, Río Negro, Santa Cruz and Neuquén provinces. Twenty female mites from each
sampling site were used to carry out the genetic analysis. For DNA extraction a nondestructive method was used. DNA sequences
were compared to Korean haplotype (AF106899) and Japanese haplotype (AF106897). All DNA sequences obtained from mite populations
sampled in Argentina, share 98% of similitude with Korean Haplotype (AF106899). Taking into account these results, we are
able to conclude that Korean haplotype is cosmopolite in Argentina. |
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