Can Preference for Oviposition Sites Initiate Reproductive Isolation in Callosobruchus maculatus?

Rova, Emma; Björklund, Mats

doi:10.1371/journal.pone.0014628

Cited by 20 publications

(14 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…). However, trade‐offs involving other unmeasured components of fitness, such as fecundity or mate acquisition, could have occurred and would not have been detected (Rova and Björklund ; Anderson et al. ).…”

Section: Discussionmentioning

confidence: 99%

Genomic evidence that resource-based trade-offs limit host-range expansion in a seed beetle

2016

View full text Add to dashboard Cite

Trade-offs have often been invoked to explain the evolution of ecological specialization. Phytophagous insects have been especially well studied, but there has been little evidence that resource-based trade-offs contribute to the evolution of host specialization in this group. Here, we combine experimental evolution and partial genome resequencing of replicate seed beetle selection lines to test the trade-off hypothesis and measure the repeatability of evolution. Bayesian estimates of selection coefficients suggest that rapid adaptation to a poor host (lentil) was mediated by standing genetic variation at multiple genetic loci and involved many of the same variants in replicate lines. Sublines that were then switched back to the ancestral host (mung bean) showed a more gradual and variable (less repeatable) loss of adaptation to lentil. We were able to obtain estimates of variance effective population sizes from genome-wide differences in allele frequencies within and between lines. These estimates were relatively large, which suggests that the contribution of genetic drift to the loss of adaptation following reversion was small. Instead, we find that some alleles that were favored on lentil were selected against during reversion on mung bean, consistent with the genetic trade-off hypothesis.

show abstract

Section: Discussionmentioning

confidence: 99%

Genomic evidence that resource-based trade-offs limit host-range expansion in a seed beetle

2016

View full text Add to dashboard Cite

show abstract

“…In this regard, the role of ecology in speciation has been systematically evaluated [2], [3], [4] and a recent metanalysis involving groups of angiosperms, fishes, frogs, birds, pigeons, butterflies and fruit flies revealed a link between ecological divergence and reproductive isolation [5], [6]. Changes in habitat/diet were shown to be positively associated with reproductive isolation in insects [5], [7] supporting the notion that ecological consequences of host plant shifts may be responsible for the remarkable diversity of phytophagous groups.…”

Section: Introductionmentioning

confidence: 99%

Differences in Tolerance to Host Cactus Alkaloids in Drosophila koepferae and D. buzzatii

et al. 2014

View full text Add to dashboard Cite

The evolution of cactophily in the genus Drosophila was a major ecological transition involving over a hundred species in the Americas that acquired the capacity to cope with a variety of toxic metabolites evolved as feeding deterrents in Cactaceae. D. buzzatii and D. koepferae are sibling cactophilic species in the D. repleta group. The former is mainly associated with the relatively toxic-free habitat offered by prickly pears (Opuntia sulphurea) and the latter has evolved the ability to use columnar cacti of the genera Trichocereus and Cereus that contain an array of alkaloid secondary compounds. We assessed the effects of cactus alkaloids on fitness-related traits and evaluated the ability of D. buzzatii and D. koepferae to exploit an artificial novel toxic host. Larvae of both species were raised in laboratory culture media to which we added increasing doses of an alkaloid fraction extracted from the columnar cactus T. terschekii. In addition, we evaluated performance on an artificial novel host by rearing larvae in a seminatural medium that combined the nutritional quality of O. sulphurea plus amounts of alkaloids found in fresh T. terschekii. Performance scores in each rearing treatment were calculated using an index that took into account viability, developmental time, and adult body size. Only D. buzzatii suffered the effects of increasing doses of alkaloids and the artificial host impaired viability in D. koepferae, but did not affect performance in D. buzzatii. These results provide the first direct evidence that alkaloids are key determinants of host plant use in these species. However, the results regarding the artificial novel host suggest that the effects of alkaloids on performance are not straightforward as D. koepferae was heavily affected. We discuss these results in the light of patterns of host plan evolution in the Drosophila repleta group.

show abstract

“…Differential host performance between different populations may be a first step towards reproductive isolation [38]–[41], as shown recently for the bruchid Callosobruchus maculatus [42]. It is therein discussed that host-preference and assortative mating can coevolve in the absence of local adaptation, but in order to maintain assortative mating after secondary contact, fitness differences and local adaptation appear to be necessary [42]. Interestingly, the two host plant species ( C. chilensis and C. bonariensis ) do not differ in seed size or seed nitrogen content [29], which are general indicators of host quality for seed beetles [14], [43]–[45].…”

Section: Discussionmentioning

confidence: 72%

“…In particular, bruchids from this population had larger body size and lived longer when reared on C. chilensis seeds as compared to those reared on C. bonariensis . Differential host performance between different populations may be a first step towards reproductive isolation [38]–[41], as shown recently for the bruchid Callosobruchus maculatus [42]. It is therein discussed that host-preference and assortative mating can coevolve in the absence of local adaptation, but in order to maintain assortative mating after secondary contact, fitness differences and local adaptation appear to be necessary [42].…”

Section: Discussionmentioning

confidence: 85%

Local Host Adaptation and Use of a Novel Host in the Seed Beetle Megacerus eulophus

Stotz

Suárez

Gonzáles³

et al. 2013

PLoS ONE

View full text Add to dashboard Cite

Spatial variation in host plant availability may lead to specialization in host use and local host adaptation in herbivorous insects, which may involve a cost in performance on other hosts. We studied two geographically separated populations of the seed beetle Megacerus eulophus (Coleoptera: Bruchidae) in central Chile: a population from the host Convolvulus chilensis (in Aucó) and a population from C. bonariensis (in Algarrobo). In Aucó C. chilensis is the only host plant, while in Algarrobo both C. bonariensis and C. chilensis are available. We tested local adaptation to these native host plants and its influence on the use of another, exotic host plant. We hypothesized that local adaptation would be verified, particularly for the one-host population (Aucó), and that the Aucó population would be less able to use an alternative, high-quality host. We found evidence of local adaptation in the population from C. chilensis. Thus, when reared on C. chilensis, adults from the C. chilensis population were larger and lived longer than individuals from the C. bonariensis population, while bruchids from the two populations had the same body size and longevity when reared on C. bonariensis. Overall, bruchids from the C. chilensis population showed greater performance traits than those from the C. bonariensis population. There were no differences between the bruchid populations in their ability to use the alternative, exotic host Calystegia sepium, as shown by body size and longevity patterns. Results suggest that differences in local adaptation might be explained by differential host availability in the study populations.

show abstract

Can Preference for Oviposition Sites Initiate Reproductive Isolation in Callosobruchus maculatus?

Cited by 20 publications

References 29 publications

Genomic evidence that resource-based trade-offs limit host-range expansion in a seed beetle

Genomic evidence that resource-based trade-offs limit host-range expansion in a seed beetle

Differences in Tolerance to Host Cactus Alkaloids in Drosophila koepferae and D. buzzatii

Local Host Adaptation and Use of a Novel Host in the Seed Beetle Megacerus eulophus

Contact Info

Product

Resources

About