Free access
Volume 25, Number 6, 1994
Page(s) 557 - 565
Apidologie 25 (1994) 557-565
DOI: 10.1051/apido:19940606

Introgression between Apis mellifera capensis Escholtz and Apis mellifera scutellata Lepeletier: the sting pheromones

H.R. Hepburna, G.E. Jonesa and R. Kirbyb

a  Department of Zoology and Entomology, Rhodes University, Grahamstown, 6140 South Africa
b  Department of Biochemistry and Microbiology, Rhodes University, Grahamstown, 6140 South Africa

Abstract - The 8 principal components of the alarm pheromone from the stings of guard bees from natural populations of Apis mellifera capensis and A m scutellata and areas of hybridization were analysed by gas chromatography. A m scutellata produces significantly more secretion than A m capensis. Autocorrelation analyses of intercolonical variance indicates regions of significant variation in these traits. This introgression coincides with hybridization zones previously defined by other variables. Introgression intensity is related to relative honeybee population density and reveals a probable cyclical bottleneck in 1 area generated by climatic oscillations.

Key words: Apis mellifera capensis / Apis mellifera scutellata / hybridization / sting pheromone