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Male Reproductive Parasitism: A Factor In The Africanization Of European Honey-Bee Populations, Thomas E. Rinderer, Richard L. Hellmich Ii, Anita M. Collins, Robert G. Danka
Male Reproductive Parasitism: A Factor In The Africanization Of European Honey-Bee Populations, Thomas E. Rinderer, Richard L. Hellmich Ii, Anita M. Collins, Robert G. Danka
Richard L Hellmich
Africanized drone honey bees (Apis mellifera) migrate into European honey-bee colonies in large numbers, but Africanized colonies only rarely host drones from other colonies. This migration leads to a strong mating advantage for Africanized bees since it both inhibits European drone production and enhances Africanized drone production
Selection For High And Low Pollenhoarding Honey Bees, Richard L. Hellmich Ii, Jovan M. Kulincevic, Walter C. Rothenbuhler
Selection For High And Low Pollenhoarding Honey Bees, Richard L. Hellmich Ii, Jovan M. Kulincevic, Walter C. Rothenbuhler
Richard L Hellmich
Pollen hoarding by the honey bee can be modified by selection. Two-way selection for honey bees that hoarded high and low levels of pollen in nucleus colonies was made for four generations. Two different lines of bees were produced in which high-line colonies hoarded significantly more pollen than low-line colonies. Rapid separation exhibited by the two lines suggests that the heritability of this trait is high (divergence h2 = 49.5 percent ± 20.3 percent). Genetic gains of the lines were asymmetrical in which substantial progress was made during high-line selection, while little, if any progress was made during low-line selection. …