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The Journal of Heredity 2000:91(6)
© 2000 The American Genetic Association 91:474-479

Genetic dissection of honeybee (Apis mellifera L.) foraging behavior

RE Page, Jr1,*, MK Fondrk2, GJ Hunt2, E Guzmán-Novoa2, MA Humphries2, K Nguyen2, and AS Greene2

1Department of Entomology, University of California, Davis, CA 95616, USA 2Department of Entomology, Purdue University, West Lafayette, Indiana, USA *Corresponding author E-mail: repage@ucdavis.edu

We demonstrate the effects of a new quantitative trait locus (QTL), designated pln3, that was mapped in a backcross population derived from strains of bees selected for the amount of pollen they store in combs. We independently confirmed pln3 by demonstrating its effects on individual foraging behavior, as we did previously for QTLs pln1 and pln2 (Hunt et al. 1995). QTL pln2 is very robust in its effects on foraging behavior. In this study, pln2 was again shown to affect individual foraging behavior of workers derived from a hybrid backcross of the selected strains. In addition, pln2 was shown to affect the amount of pollen stored in combs of colonies derived from a wide cross of European and Africanized honeybees. This is noteworthy because it demonstrates that we can map QTLs for behavior in interstrain crosses derived from selective breeding and study their effects in unselected, natural populations. The results we present also demonstrate the repeatability of finding QTLs with measurable effects, even after outcrossing selected strains, suggesting that there is a relatively small subset of QTLs with major effects segregating in the population from which we selected our founding breeding populations. The different QTLs, pln1, pln2, and pln3, appear to have different effects, revealing the complex genetic architecture of honeybee foraging behavior.


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