Hybridization and Seasonal Segregation in Two Races of a Butterfly Occurring Together in Two Localities

Hovanitz, William

doi:10.2307/1538267

Cited by 14 publications

(20 citation statements)

References 2 publications

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“…Hovanitz (1943a) provided limited anecdotal evidence of oviposition differences in a single mixed alfalfa/red clover field, but we have been unable to verify his observations and C. philodice is common in alfalfa fields (e.g., Silberglied & Taylor, 1978;Shapiro et al, 1979). Hovanitz (1943a) provided limited anecdotal evidence of oviposition differences in a single mixed alfalfa/red clover field, but we have been unable to verify his observations and C. philodice is common in alfalfa fields (e.g., Silberglied & Taylor, 1978;Shapiro et al, 1979).…”

Section: Evolution Of Performance On Different Hostsmentioning

confidence: 78%

“…Despite this apparent breakdown of reproductive isolation, there is still a tight cohesion in the inheritance of diagnostic traits (wing color, pheromones, UV reflection, body size), maintaining the appearance of two distinct species. Hovanitz had several threads of evidence for this interpretation from breeding data (Hovanitz, 1943a(Hovanitz, , 1944a, where C. philodice reared on alfalfa had lower fitness and his C. eurytheme broods did poorly on clovers. Wang (2006), studying introgression of genetic markers in a high-density genomic map, showed that regions with strong diagnostic differences exist on the X chromosome, but on the 31 autosomes, introgression is rampant with few candidates for species-diagnostic regions.…”

Section: Natural History Of the Colias Systemmentioning

confidence: 99%

“…Hovanitz (1944a) reported that C. philodice from New Hampshire reared on alfalfa were sterile in two of three subsequent crosses, and neonate larvae from the successful mating died on alfalfa. Hovanitz (1943aHovanitz ( , 1945, discussing limited results from widely dispersed, California-derived sources of breeding stock, noted that C. philodice larvae reared on M. sativa had higher mortality, reached smaller sizes, and completed development more slowly than on T. pratense. Hovanitz (1943aHovanitz ( , 1945, discussing limited results from widely dispersed, California-derived sources of breeding stock, noted that C. philodice larvae reared on M. sativa had higher mortality, reached smaller sizes, and completed development more slowly than on T. pratense.…”

Section: Evolution Of Performance On Different Hostsmentioning

confidence: 99%

“…However, in somewhat more controlled studies spanning 25 years, Gerould (1943Gerould ( , 1946 reported that both species thrived on potted T. repens (alfalfa was untested). Hovanitz (1943aHovanitz ( , 1944a also noted that several wing-pattern elements characteristic of C. philodice in the eastern USA disappeared as C. eurytheme spread into the region, which he interpreted as evidence of introgressive blending of their genomes. Hovanitz (1943aHovanitz ( , 1944a also noted that several wing-pattern elements characteristic of C. philodice in the eastern USA disappeared as C. eurytheme spread into the region, which he interpreted as evidence of introgressive blending of their genomes.…”

Section: Evolution Of Performance On Different Hostsmentioning

confidence: 99%

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Parallel evolution in sympatric, hybridizing species: performance ofColiasbutterflies on their introduced host plants

Porter

Levin

2007

Entomologia Exp Applicata

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Shared ancestry and introgression can contribute to genetic similarity between hybridizing species, and it is generally difficult to disentangle these causes. However, shared ancestry plays a more limited role in traits that have recently undergone parallel directional selection in the two species, permitting the role of introgression to be better understood. The butterflies Colias eurytheme (Boisduval) and Colias philodice (Godart) (Lepidoptera, Pieridae) are native to North America and have shifted their host ranges in parallel onto several introduced weedy and agricultural legumes. These butterflies hybridize at moderate rates throughout their range, and there is a strong possibility that they could be sharing host-associated adaptations. We split families of each species among nine introduced, prospective hosts and measured survivorship, larval duration, pupal weight, and a new variable, effective daily growth rate (DGR), analogous to a compound daily interest rate in economics. We found strong effects of host, sex, and family (species), but negligible effects of the host*species interaction that would indicate species-specific differences in performance on different hosts. We found speciesspecific life-history differences: C. eurytheme matured significantly later and reached a significantly larger body size than C. philodice while growing at the same DGR. Protandry was strong, and males, in addition to pupating sooner than females, grew significantly faster than females as measured by DGR. We measured broad-sense heritabilities and genetic correlations for host-associated performance variables. Most pairwise comparisons of performance among hosts and most pairwise comparisons between performance variables showed positive genetic correlations, except survivorship where little heritability was found. Nevertheless, a factorial multivariate analysis of variance of G-matrices showed highly significant species, host, and host*species interactions, suggesting differentially evolving genetic architectures underlying host adaptation in these two species, despite the small differences in overall performance. At least some of the genes affecting host performance in Colias are likely to be in the small, species-diagnostic regions and not shared via introgression between these hybridizing species. For biologists interested in the evolutionary ecology of their host associations, including applied biologists managing their agricultural pest potential, C. eurytheme and C. philodice are most usefully studied as if they were a single polymorphic species wherever they co-exist. In studying species that hybridize readily with a sympatric congener, it may often be necessary to include the second species in the experimental design.

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Section: Evolution Of Performance On Different Hostsmentioning

confidence: 78%

Section: Natural History Of the Colias Systemmentioning

confidence: 99%

Section: Evolution Of Performance On Different Hostsmentioning

confidence: 99%

Section: Evolution Of Performance On Different Hostsmentioning

confidence: 99%

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Parallel evolution in sympatric, hybridizing species: performance ofColiasbutterflies on their introduced host plants

Porter

Levin

2007

Entomologia Exp Applicata

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“…Backcross progeny and F 2 hybrids are also produced, thus leading to a population having individuals ranging from the one parental form to the other with no sharp line of demarkation. It has been found that these intermediate types rarely exceed 10 per cent of the entire population numbers (Hovanitz, 1943;Gerould, 1946).…”

mentioning

confidence: 99%

INTERSPECIFIC MATINGS BETWEENCOLIAS EURYTHEMEANDCOLIAS PHILODICEIN WILD POPULATIONS

Hovanitz¹

1949

Evolution

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Molecular evidence for hybridization in Colias (Lepidoptera: Pieridae): are Colias hybrids really hybrids?

Dwyer

Jasieniuk

Okada

et al. 2015

Ecology and Evolution

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Gene flow and hybridization among species dramatically affect our understanding of the species as a biological unit, species relationships, and species adaptations. In North American Colias eurytheme and Colias eriphyle, there has been historical debate over the extent of hybridization occurring and the identity of phenotypically intermediate individuals as genetic hybrids. This study assesses the population structure of these two species to measure the extent of hybridization and the genetic identity of phenotypic intermediates as hybrids. Amplified fragment length polymorphism (AFLP) marker analysis was performed on 378 specimens collected from northern California and Nevada. Population structure was inferred using a Bayesian/Markov chain Monte Carlo method, which probabilistically assigns individuals to genetic clusters. Three genetic clusters provided the best fit for the data. C. eurytheme individuals were primarily assigned to two closely related clusters, and C. eriphyle individuals were mostly assigned to a third, more distantly related cluster. There appeared to be significant hybridization between the two species. Individuals of intermediate phenotype (putative hybrids) were found to be genetically indistinguishable from C. eriphyle, indicating that previous work based on the assumption that these intermediate forms are hybrids may warrant reconsideration.

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Hybridization and Seasonal Segregation in Two Races of a Butterfly Occurring Together in Two Localities

Cited by 14 publications

References 2 publications

Parallel evolution in sympatric, hybridizing species: performance ofColiasbutterflies on their introduced host plants

Parallel evolution in sympatric, hybridizing species: performance ofColiasbutterflies on their introduced host plants

INTERSPECIFIC MATINGS BETWEENCOLIAS EURYTHEMEANDCOLIAS PHILODICEIN WILD POPULATIONS

Molecular evidence for hybridization in Colias (Lepidoptera: Pieridae): are Colias hybrids really hybrids?

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