THE GENETICS OF HOST SELECTION AND ITS BEARING ON SYMPATRIC SPECIATION IN <i>PROCECIDOCHARES</i> (DIPTERA: TEPHRITIDAE)

Huettel, M. D.; Bush, Guy L.

doi:10.1111/j.1570-7458.1972.tb00234.x

Cited by 89 publications

(35 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Often, however, the taxa initially considered to be conspecific are determined to be sympatric host-associated sibling species (Huettel and Bush, 1972;Gorske and Sell, 1976;Krysan et al, 1983;Wood and Guttman, 1983) and host-plant specialization is evident. The primary question then is not whether adaptation has occurred but, instead, what types of adaptations (behavioral or physiological) maintain host specificity.…”

mentioning

confidence: 99%

Quantitative Genetics, Development, and Physiological Adaptation in Host Strains of Fall Armyworm

Pashley

1988

Evolution

View full text Add to dashboard Cite

Abstract. -Two genetically differentiated host strains of fall armyworm were reared on their own and each other's host plants, rice and corn, to determine whether they were physiologically adapted to their natural hosts and whether they exhibited genetically based differences in development. Larval host had a greater impact on development in the rice strain than in the corn strain, indicating that physiology could have facilitated specialization in one strain but not the other. Consequently, behavioral mechanisms are also likely to be important in the maintenance of host specificity. Comparisons between strains indicated significant differences in one trait, the rate at which larvae gained weight. Because this character had consistently high heritabilities, genetic differentiation in development is indicated.An analysis of genotype-by-environment interactions within each strain detected significant interactions for three of five traits, suggesting that genotypic performance on one host was not indicative of performance on the other. Each strain thus exhibited genetic variation that would facilitate host-associated divergence and adaptation if coupled with a mechanism that reduced gene flow between hosts. Finally, significant genetic correlations between several characters were detected when strains were reared on their natural hosts but not when they were reared on nonnatural hosts. Apparently, feeding on novel hosts caused developmental uncoupling of characters. Release from genetic constraints could provide a mechanism for physiological adjustments to newly occupied habitats.

show abstract

mentioning

confidence: 99%

Quantitative Genetics, Development, and Physiological Adaptation in Host Strains of Fall Armyworm

Pashley

1988

Evolution

View full text Add to dashboard Cite

show abstract

“…Scriber (1992) also found an X-effect for ovipositional preference in hybrids between Papilio machaon and P. zelicaon. Huettel and Bush (1972) reported that F 1 hybrid females between different species of Procecidochares gall forming tephritid flies displayed ovipositional preference for their mother's host plant. They interpreted this result as evidence of host conditioning, although it is more likely indicative of a maternal effect.…”

Section: Discussionmentioning

confidence: 99%

The Genetic Basis for Fruit Odor Discrimination in Rhagoletis Flies and Its Significance for Sympatric Host Shifts

et al. 2005

View full text Add to dashboard Cite

Rhagoletis pomonella (Diptera: Tephritidae) use volatile compounds emitted from the surface of ripening fruit as important chemosensory cues for recognizing and distinguishing among alternative host plants. Host choice is of evolutionary significance in Rhagoletis because these flies mate on or near the fruit of their respective host plants. Differences in host choice based on fruit odor discrimination therefore result in differential mate choice and prezygotic reproductive isolation, facilitating sympatric speciation in the absence of geographic isolation. We test for a genetic basis for host fruit odor discrimination through an analysis of F2 and backcross hybrids constructed between apple-, hawthorn-, and flowering dogwood-infesting Rhagoletis flies. We recovered a significant proportion (30-65%) of parental apple, hawthorn, and dogwood fly response phenotypes in F2 hybrids, despite the general failure of F1 hybrids to reach odor source spheres. Segregation patterns in F2 and backcross hybrids suggest that only a modest number of allelic differences at a few loci may underlie host fruit odor discrimination. In addition, a strong bias was observed for F2 and backcross flies to orient to the natal fruit blend of their maternal grandmother, implying the existence of cytonuclear gene interactions. We explore the implications of our findings for the evolutionary dynamics of sympatric host race formation and speciation.

show abstract

“…For instance, the probability of occurrence of a rapid host shift and consequent speciation may be a function of the genetic basis for variation in resource use (see, for example, the genetic transilience model of Templeton, 1980). Crosses carried out between individuals from different, genetically isolated populations (Carson and Ohta, 1981;Leslie and Dingle, 1983), "host races" (Knerer and Atwood, 1973), or species (Huettel and Bush, 1972) Buxton, North Carolina; Chesapeake, Virginia; and three sites in the Great Smoky Mountains National Park. These strains were maintained by sib mating for the first three generations in laboratory culture in order to increase the ratio of amongto within-strain genetic variation.…”

Section: Introductionmentioning

confidence: 99%

Genetics of oviposition-site preference in Drosophila tripunctata

Jaenike

1987

Heredity

View full text Add to dashboard Cite

THE GENETICS OF HOST SELECTION AND ITS BEARING ON SYMPATRIC SPECIATION IN PROCECIDOCHARES (DIPTERA: TEPHRITIDAE)

Cited by 89 publications

References 26 publications

Quantitative Genetics, Development, and Physiological Adaptation in Host Strains of Fall Armyworm

Quantitative Genetics, Development, and Physiological Adaptation in Host Strains of Fall Armyworm

The Genetic Basis for Fruit Odor Discrimination in Rhagoletis Flies and Its Significance for Sympatric Host Shifts

Genetics of oviposition-site preference in Drosophila tripunctata

Contact Info

Product

Resources

About