Circadian rhythm and time of mating in Bactrocera cucurbitae (Diptera: Tephritidae) selected for age at reproduction

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Abstract

Chrono-biological traits were changed by selecting for life-history traits via a genetic linkage controlling both time-related behavioural and life-history traits. Behavioural traits were compared between lines selected for young (Y-lines) and old (O-lines) age at reproduction in the melon fly, Bactrocera cucurbitae (Coquillett). Adults from O-lines, which survive longer than flies from Y-lines, mated later in the day and had a longer period of circadian rhythm in the locomotor activity than those from Y-lines. Flies from F1 reciprocal crosses had an intermediate time of mating and periods of circadian rhythm between that of the parents, indicating a genetic basis to these traits. The presence of these behavioural differences across the selection lines indicates that chrono-biological traits exhibit correlated responses to selection on age at reproduction. The correlated responses in the behavioural traits to selection for life-history traits are discussed from two points of view: pleiotropy and inadvertent selection.

Original languageEnglish
Pages (from-to)302-306
Number of pages5
JournalHeredity
Volume88
Issue number4
DOIs
Publication statusPublished - Jan 1 2002

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Keywords

  • Correlated response
  • Free-running period
  • Life-history
  • Longevity
  • Mating behaviour
  • Melon fly

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)

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