Life history phenology differences between southern and northern populations of the apple maggot fly, Rhagoletis pomonella

Sheila Lyons-Sobaski, Stewart H. Berlocher

Research output: Contribution to journalArticlepeer-review

Abstract

The textbook version of sympatric host race formation in Rhagoletis pomonella (Walsh) (Diptera: Tephritidae) features an ancestral hawthorn-infesting race and a derived apple race differing in life-history timing and response to host fruit odor. However, previous research has focused largely on northeastern North America. To investigate life-history timing in poorly studied southeastern North American populations with very diverse hosts, we performed common garden experiments on emergence time on six southern R. pomonella populations and four other R. pomonella species-group populations. Findings were: (1) the diverse adult emergence times of southern populations resulted largely from genetic differences; (2) some southern populations had bimodal emergence curves; (3) correlations of allozyme markers and emergence times were uncommon in southern populations; and (4) mean emergence times from common garden rearings and dates of field collection of the populations were strongly correlated.

Original languageEnglish (US)
Pages (from-to)149-159
Number of pages11
JournalEntomologia Experimentalis et Applicata
Volume130
Issue number2
DOIs
StatePublished - Feb 2009

Keywords

  • Bimodal emergence
  • Biogeography
  • Diptera
  • Evolution
  • Host race
  • Life history evolution
  • Sympatric speciation
  • Tephritidae

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Insect Science

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