Evidence of natural hybridization between two sympatric sibling species of Bactrocera dorsalis complex based on pheromone analysis

Wee Suk Ling, Keng Hong Tan

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Bactrocera carambolae and B. papayae are major fruit fly pests and sympatric sibling species of the B. dorsalis complex. They possess distinct differences in male pheromonal components. In the 1990's, wild Bactrocera fruit flies with morphological traits intermediate between those of B. carambolae and B. papayae were often captured in traps baited with methyl eugenol (ME). Chemical analyses of rectal glands of ME-fed males revealed that the laboratory F1, F2, and backcross hybrids possessed ME-derived sex pheromonal components ranging from that typical of B. papayae to that of B. carambolae without any specific trend, which included a combination of pheromonal components from both parental species within an individual hybrid. ME-fed hybrids without any ME-derived pheromonal components were also detected. Further chemical analysis of rectal glands from wild Bactrocera males, after ME feeding in the laboratory, showed a combination of pheromonal components similar to that found in the ME-fed, laboratory-bred hybrids. These findings present circumstantial evidence for the occurrence of a natural hybrid of the two Bactrocera species.

Original languageEnglish
Pages (from-to)845-858
Number of pages14
JournalJournal of Chemical Ecology
Volume31
Issue number4
DOIs
Publication statusPublished - Apr 2005
Externally publishedYes

Fingerprint

methyleugenol
Tephritidae
Sympatry
methyl eugenol
Bactrocera dorsalis
Pheromones
sibling species
pheromone
pheromones
hybridization
Bactrocera carambolae
Bactrocera
Bactrocera papayae
Salt Gland
fruit
fruit flies
Fruits
Diptera
Fruit
chemical analysis

Keywords

  • (E)-coniferyl alcohol
  • 2-allyl-4,5-dimethoxyphenol
  • 6-oxo-1-nonanol
  • B. papayae (=B. dorsalis)
  • Bactrocera carambolae
  • Hybrid
  • Male pheromone
  • Methyl eugenol
  • Rectal gland

ASJC Scopus subject areas

  • Ecology
  • Biochemistry, Genetics and Molecular Biology(all)
  • Biochemistry

Cite this

Evidence of natural hybridization between two sympatric sibling species of Bactrocera dorsalis complex based on pheromone analysis. / Suk Ling, Wee; Tan, Keng Hong.

In: Journal of Chemical Ecology, Vol. 31, No. 4, 04.2005, p. 845-858.

Research output: Contribution to journalArticle

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abstract = "Bactrocera carambolae and B. papayae are major fruit fly pests and sympatric sibling species of the B. dorsalis complex. They possess distinct differences in male pheromonal components. In the 1990's, wild Bactrocera fruit flies with morphological traits intermediate between those of B. carambolae and B. papayae were often captured in traps baited with methyl eugenol (ME). Chemical analyses of rectal glands of ME-fed males revealed that the laboratory F1, F2, and backcross hybrids possessed ME-derived sex pheromonal components ranging from that typical of B. papayae to that of B. carambolae without any specific trend, which included a combination of pheromonal components from both parental species within an individual hybrid. ME-fed hybrids without any ME-derived pheromonal components were also detected. Further chemical analysis of rectal glands from wild Bactrocera males, after ME feeding in the laboratory, showed a combination of pheromonal components similar to that found in the ME-fed, laboratory-bred hybrids. These findings present circumstantial evidence for the occurrence of a natural hybrid of the two Bactrocera species.",
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