Antagonistic pleiotropy and the evolution of wing dimorphism in the sand cricket, Gryllus firmus
نویسندگان
چکیده
منابع مشابه
Juvenile hormone titer and morph-specific reproduction in the wing-polymorphic cricket, Gryllus firmus.
Juvenile hormone titers and reproductive characteristics were measured in adult wing and flight-muscle morphs of the wing-polymorphic cricket, Gryllus firmus, during the first week of adulthood. This species has three morphs: one flight capable morph with fully-developed wings and fully-developed flight muscles [LW(F)], one flightless morph with fully-developed wings and histolyzed (non-functio...
متن کاملEvolutionary Endocrinology of Juvenile Hormone Esterase: Functional Relationship with Wing Polymorphism in the Cricket, Gryllus Firmus.
The existence, nature, and physiological consequences of genetic variation for juvenile hormone esterase (JHE) activity was studied in the wing-polymorphic cricket, Gryllus firmus. Hemolymph (blood) JHE activity was sixfold lower in nascent short-winged (SW) females, relative to nascent long-winged (LW) females during the last juvenile stadium (stage). Morph-associated genetic variation for JHE...
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Directional selection produces a change in the population mean of a phenotype, but this shift will only be translated into a phenotypic difference between generations if the trait is heritable, in the sense that there is additive genetic variance in the trait. Thus any study of evolutionary change must concern itself both with the factors causing phenotypic change and the genetic architecture o...
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Cytoplasmic NADP-isocitrate dehydrogenase (NADP-IDH) has been purified and characterized, and its gene sequenced in many animal, plant, and yeast species. However, much less information is available on this enzyme-gene in insects. As a first step in investigating the biochemical and molecular mechanisms by which NADP-IDH contributes to adaptations for flight vs. reproduction in insects, the enz...
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ژورنال
عنوان ژورنال: Heredity
سال: 1990
ISSN: 0018-067X,1365-2540
DOI: 10.1038/hdy.1990.85