genetic structure of nest aggregations and drone congregations of the southeast asian stingless bee trigona stingless bees, sex is determined by a single complementary sex-determining locus. this method of sex determination imposes a severe cost of inbreeding because an egg fertilized by sperm carrying the same sex allele as the egg results in a sterile diploid male. to explore how reproductive strategies may be used to avoid inbreeding in stingless bees, we studied the genetic structure of a population of 27 colonies and three drone congregations of trigona collina in chanthaburi, thailand. the co ...200415245407
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