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Genetic heterogeneity, reproductive isolation and host preferences in mealy aphids of the Hyalopterus pruni complex (Homoptera, Aphidoidea)
Author(s) -
Mosco M. C.,
Arduino P.,
Bullini L.,
Barbagallo S.
Publication year - 1997
Publication title -
molecular ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.619
H-Index - 225
eISSN - 1365-294X
pISSN - 0962-1083
DOI - 10.1046/j.1365-294x.1997.00234.x
Subject(s) - biology , sympatric speciation , reproductive isolation , host (biology) , genetic algorithm , homoptera , hybrid , botany , ecology , population , pest analysis , demography , sociology
Three taxa were detected by allozyme markers within the mealy aphids of the Hyalopterus pruni complex, having different cultivated Prunus species as main primary hosts. The genetically closer H. pruni and H. amygdali A ( D Nei = 0.10) never share primary hosts, whereas H. amygdali A and B ( D Nei = 0.32) may occasionally share them, producing few F 1 hybrids. The three species proved reproductively isolated in the field, with no gene exchange. Their speciation seem to have occurred long before the agricultural revolution, crop colonization representing a host range expansion rather than a host shift, as in sympatric speciation.