2008
DOI: 10.1673/031.008.6601
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Abstract: The thistle-infesting fruit fly Tephritis conura Loew (Diptera: Tephritidae) forms host races on the melancholy thistle, Cirsium hetewphyllum (L.) Hill (Asterales: Asteraceae) and the cabbage thistle, Cirsium olemceum (L.). Scop. Previous research indicates that the host shift occurred from C. hetewphyllum to C. oleraceum. In this paper we address whether the host shift involved physiological adaptations by studying oviposition acceptance and survival of the two host races on the derived host C. oleraceum. Per… Show more

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Cited by 9 publications
(30 citation statements)
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“…]) support the presence of discrete genetic host races. Moreover, the flies also have poor performance on the alternate host plant (Diegisser et al, 2008). In light of this, the moderate host race divergence in morphology was unexpected, but this result is in line with the observation that parallelism in fitness is typically higher than for both phenotypic divergence and genetic divergence (Bolnick et al, 2018).…”
Section: Discussionsupporting
confidence: 60%
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“…]) support the presence of discrete genetic host races. Moreover, the flies also have poor performance on the alternate host plant (Diegisser et al, 2008). In light of this, the moderate host race divergence in morphology was unexpected, but this result is in line with the observation that parallelism in fitness is typically higher than for both phenotypic divergence and genetic divergence (Bolnick et al, 2018).…”
Section: Discussionsupporting
confidence: 60%
“…Potentially, the other traits measured are not important enough for host plant adaptation to result in strongly parallel divergence. Traits that have been shown to differ strongly between host races include female ovipositor length (Diegisser et al, 2007) and the larval ability to survive on the different host plant species (Diegisser et al, 2008), and these traits are more likely to show parallel divergence.…”
Section: Discussionmentioning
confidence: 99%
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“…A marine snail, Littorina saxatilis, developed from genetically distinct morphs (Conde-Padín et al 2007) as well as several species of dipterans (Feder et al 2003;Diegisser et al 2007;Simard et al 2009) While the literature in Table 2 illustrates how sympatrically cladogenic polymorphisms develop, it does not demonstrate which mode of development more quickly leads to speciation. As a result of several factors, the dynamics of the transition from resource polymorphisms to daughter species will largely be system-dependent, with some genetic systems moving faster than some plastic systems and vice versa.…”
Section: !mentioning
confidence: 99%