Jaenike John
Department of Biology, University of Rochester, Rochester, NY, 14627.
Evolution. 1985 Mar;39(2):362-369. doi: 10.1111/j.1558-5646.1985.tb05673.x.
Mark-release-recapture field experiments involving two isofemale strains of Drosophila tripunctata revealed that strain identity strongly and consistently affected the preferences of both males and females for mushrooms versus tomatoes. Females, but not males, showed an augmented preference for the type of food on which they had been kept prior to release. The behavior of F2 flies from reciprocal crosses between the two strains demonstrated that genetic variation for food preference is autosomal and largely additive. Because mating often occurs in the vicinity of food in the wild, positive assortative mating with respect to genes for food preference may lead to greater phenotypic variance in preference, which could increase the variety of food resources used by a population.
涉及两种三斑果蝇同雌系菌株的标记重捕野外实验表明，菌株身份强烈且持续地影响着雄性和雌性对蘑菇与番茄的偏好。雌性（而非雄性）对释放前饲养所用食物类型表现出更强的偏好。来自这两种菌株相互杂交的F2代果蝇的行为表明，食物偏好的遗传变异是常染色体的，且很大程度上是累加性的。由于在野外交配通常发生在食物附近，就食物偏好基因而言的正向选型交配可能导致偏好方面更大的表型变异，这可能会增加种群所利用食物资源的多样性。
