PMID: 11327161May 1, 2001Paper

The endocrine-genetic basis of life-history variation: the relationship between the ecdysteroid titer and morph-specific reproduction in the wing-polymorphic cricket Gryllus firmus

Evolution; International Journal of Organic Evolution
Anthony J Zera, J Bottsford

Abstract

The hormonal basis of variation in life-history traits is a poorly studied topic in life-history evolution. An important step in identifying the endocrine-genetic causes of life-history variation is documenting statistical and functional associations between hormone titers and genotypes/phenotypes that vary in life-history traits. To this end, we compared the blood ecdysteroid titer and the mass of the ovaries during the first week of adulthood among a flight-capable morph and two flightless morphs of the wing-polymorphic cricket Gryllus firmus. Ecdysteroids are a group of structurally related hormones that regulate many important aspects of reproduction in insects. Both the ecdysteroid titer and ovarian mass were significantly higher in each of two flightless morphs compared with the flight-capable morph throughout the first week of adulthood. Genetically based differences in the ecdysteroid titer and ovarian mass between morphs from different selected lines were similar to phenotypically based differences among morphs from the same control (unselected) lines. By day 7 of adulthood, ovaries were typically 200-400% larger and the ecdysteroid titer was 60-300% higher in flightless versus the flight-capable morph. In addition, hi...Continue Reading

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Citations

Mar 22, 2007·BioEssays : News and Reviews in Molecular, Cellular and Developmental Biology·Robert E Page, Gro V Amdam
Sep 21, 2011·Biological Reviews of the Cambridge Philosophical Society·Dries BonteJustin M J Travis
Feb 13, 2010·Annual Review of Physiology·Martin E FederAnthony J Zera
Nov 12, 2005·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Colin BrentEd Vargo
Sep 2, 2017·Integrative and Comparative Biology·Elizabeth A AddisAnne M Bronikowski
Jul 28, 2004·Proceedings of the National Academy of Sciences of the United States of America·Gro V AmdamRobert E Page
Oct 7, 2014·Oecologia·Stuart R DennisAndrew P Beckerman
Mar 28, 2006·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Anthony J Zera
Oct 24, 2006·Trends in Ecology & Evolution·Lawrence G Harshman, Anthony J Zera

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