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Titolo:
Temperature effects and genotype-by-environment interactions in hybrids: Haldane's rule in flour beetles
Autore:
Wade, MJ; Johnson, NA; Toquenaga, Y;
Indirizzi:
Indiana Univ, Dept Biol, Bloomington, IN 47405 USA Indiana Univ Bloomington IN USA 47405 ept Biol, Bloomington, IN 47405 USA Univ Massachusetts, Dept Entomol, Amherst, MA 01003 USA Univ Massachusetts Amherst MA USA 01003 pt Entomol, Amherst, MA 01003 USA Univ Tsukuba, Inst Biol Sci, Tsukuba, Ibaraki 305, Japan Univ Tsukuba Tsukuba Ibaraki Japan 305 l Sci, Tsukuba, Ibaraki 305, Japan
Titolo Testata:
EVOLUTION
fascicolo: 3, volume: 53, anno: 1999,
pagine: 855 - 865
SICI:
0014-3820(199906)53:3<855:TEAGII>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
DROSOPHILA-SIMULANS CLADE; TRIBOLIUM-CASTANEUM; REPRODUCTIVE ISOLATION; NATURAL-POPULATIONS; INTERSPECIFIC HYBRIDS; GENETIC-VARIATION; MALE-STERILITY; D-MAURITIANA; RESCUE ZHR; T-FREEMANI;
Keywords:
flour beetles; genotype-by-environment interaction; Haldane's rule; hybrid inviability; morphology; norms of reaction; speciation; temperature; Tribolium;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
87
Recensione:
Indirizzi per estratti:
Indirizzo: Wade, MJ Indiana Univ, Dept Biol, Jordan Hall, Bloomington, IN 47405 USA Indiana Univ Jordan Hall Bloomington IN USA 47405 n, IN 47405 USA
Citazione:
M.J. Wade et al., "Temperature effects and genotype-by-environment interactions in hybrids: Haldane's rule in flour beetles", EVOLUTION, 53(3), 1999, pp. 855-865

Abstract

When males of the flour beetle, Tribolium castaneum, are crossed to females of its close relative T. freemani, the sex ratio of the hybrids is femalebiased, owing in part to hybrid male mortality. Morphological abnormalities are also frequent in the surviving hybrid males, but not in the hybrid females. The finding that the heterogametic sex (male) is more adversely affected in interspecific crosses than the homogametic sex is consistent with Haldane's rule, which predicts that hybrid dysfunction should emerge as an indirect byproduct of divergent adaptation to differing environments. If so,environmental effects and genotype-by-environment interactions (GEI) should characterize the expression of Haldane's rule and interspecific hybrid traits in general. We used two wild-collected populations of T. castaneum (from Infantes, Spain, and Madagascar) to investigate the effects of environmental variation on the expression of Haldane's rule. Males from each population were mated to several T. freemani females and the half-sibling hybrid progenies were reared across a series of temperature regimes. For both populations, we found that hybrids raised at higher temperatures exhibited a more extreme expression of Haldane's rule: The hybrid sex ratios were more biased toward females and hybrid males had a much higher incidence of morphological abnormalities. The average response to temperature, the norm of reaction for Haldane's rule, varied between the two populations, and we found considerable and significant GEI for both hybrid traits within both populations. The evolutionary implications of these findings are discussed in the context of speciation arising as an indirect effect of local adaptation.

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Documento generato il 08/07/20 alle ore 07:17:55