Gel-electrophoretic description of European populations ofTerellia virens (Loew) (Diptera, Tephritidae); implications for its use as an agent for the biological control ofCentaurea spp. (Asteraceae) in North America

Müller‐Schärer, Heinz; Lehr, Claudia; Klein, Michael D.; Marquardt, K.

doi:10.1007/bf01922473

Cited by 1 publication

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“…Our study stresses the importance of population studies on a broad regional scale before selecting populations for screening or releasing in biocontrol projects or concentrating on questions about species-host specialization. This was claimed some years ago by Gonzales et al (1979), but a populations genetics perspective is still lacking from most projects (Miiller-Scharer et al, 1991).…”

Section: Discussionmentioning

confidence: 99%

Geographic differentiation between populations of Rhinocyllus conicus Frölich (Coleoptera: Curculionidae): concordance of allozyme and morphometric analysis

Klein

Seitz

1994

Zoological Journal of the Linnean Society

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The weevil Rhinocyllu conicus develops only in the flowerheads of thistles {Asteracea; Carduineae) and therefore it is used as a biocontrol agent against thistle weed species. Populations out of 14 regions within its natural distribution area (from the Atlantic coast in the west to Israel in the east) were analysed by means of allozymes and morphometries. In both analyses the 14 populations were grouped into two concordant units. Based on nine scored loci (six of them polymorphic), mean Nei's genetic distance between the two groups was 0.073. In a reclassification test following DFA of morphometric data, 93.2% of all individuals were grouped back into the correct group. The two groups were considered to belong to a temperate and a Mediterranean subspecies respectively, the latter probably identical to the formerly described Rhinocyllus oblongus.

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Section: Discussionmentioning

confidence: 99%