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Sex determination in bees. XXV Adaptative value of the xo1 gene in its origin
Warwick Estevam KerrI; Silvio Gomes MonteiroII; Hélio Augusto S. KerrII
IUniversidade Estadual do Maranhio, Caixa Postal 9, 6500 Sio Luís, MA, Brazil. Send correspondence to W.E.K.
IIDepartamento de Biologia, Universidade Federal do Maranhio, 65000 São Luís, MA, Brasil
ABSTRACT
An algebraic treatment shows that an xol mutation (which produces diploid xol xol drones) of the xo sex genes, will become automatically established in a panmictic Hymenoptera population whenever the adaptive value of xo/xo females or xo males is smaller than the adaptive value of xo/xol females or xo1 males. By computer simulation it was shown that in endogamous populations the new xol mutation will not be commonly established because of the severe conditions: xo/xol needs an adaptive value 1/3 greater than that of xo/xo, or xo must have an adaptive value of 0.50 or less (xo/xol and xol being 1).
Keywords: bees; xo1; gene; origin.
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