Abstract:
:Chemical signals in insects have been documented to play an important role in mate recognition, and divergence in chemical signals can often cause sexual isolation between closely related species or populations within species. We investigated the role of cuticular hydrocarbons (CHCs), short distance chemical signals, in male mate recognition between the two sympatric elm leaf beetles, Pyrrhalta maculicollis and Pyrrhaltaaenescens. Mating experiments demonstrated that strong sexual isolation between the two species was driven by CHCs divergence. Males preferred to mate with conspecific females with intact conspecific CHCs or conspecific CHCs reapplied after removal. Males also preferred heterospecific females that were treated with conspecific CHCs. Chemical analysis showed that the CHC profiles differ significantly between species. In P. maculicollis dimethyl-branched alkanes between C29 and C35 account for the majority of the saturated alkanes while the CHC profile of P. aenescens mostly consisted of monomethyl-branched alkanes between C22 and C29. Additionally, some compounds, such as 12,18-diMeC32, 12,18-diMeC34, are unique to P. maculicollis.
journal_name
J Insect Physioljournal_title
Journal of insect physiologyauthors
Zhang B,Xue HJ,Song KQ,Liu J,Li WZ,Nie RE,Yang XKdoi
10.1016/j.jinsphys.2014.08.006subject
Has Abstractpub_date
2014-11-01 00:00:00pages
15-21eissn
0022-1910issn
1879-1611pii
S0022-1910(14)00162-0journal_volume
70pub_type
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