Free Access
Volume 30, Number 1, 1999
Page(s) 31 - 36
Apidologie 30 (1999) 31-36
DOI: 10.1051/apido:19990104

Occurrence of two genotypes of Varroa jacobsoni Oud. in North America

Lilia I. de Guzman, Thomas E. Rinderer and J. Anthony Stelzer

USDA/ARS, Honey-Bee Breeding, Genetics and Physiology Laboratory, 1157 Ben Hur Road, Baton Rouge, LA 70820, USA

Abstract - Both the Russian and Japanese genotypes of Varroa jacobsoni were present in the United States and Canada. Only the Russian genotype was found in Mexico. Our results suggest that North America, and especially the United States has had more than one introduction of Varroa jacobsoni. Differences in virulence among strains of V. jacobsoni may be the basis for reports of regional variation in honey bee resistance to Varroa. Thus, further studies on the interaction between Varroa and honey bee genotypes are needed to fully resolve the issue. © Inra/DIB/AGIB/Elsevier, Paris

Key words: Varroa jacobsoni / genotype / RAPD / North America / USA / Canada / Mexico / Russia / Europe

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