Interspecific Hybridization in the Genus Drosophila

Bock, I. R.

doi:10.1007/978-1-4615-6977-0_3

Cited by 85 publications

(51 citation statements)

References 44 publications

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“…This concerns closely related species between which hybrids can be partly fertile (in general, the heterogametic sex, according to the Haldane's rule). Such a phenomenon has been reported between D. bifasciata and D. imaii (Haring et al, 1995), the species of simulans complex (Lachaise et al, 1988), the species of the groups willistoni (reviewed by Bock, 1984) and saltans (Bicudo, 1973(Bicudo, , 1979Bicudo and Prioli, 1978) and, D. serido and D. buzzatii (Madi-Ravazzi et al, 1997). This may explain the sequence similarity of TEs between closely related species observed by several authors (Brunet et al, 1994;Haring et al, 1995;Silva and Kidwell, 2000;Almeida and Carareto, 2005).…”

Section: Horizontal Transfer Of Tes Inmentioning

confidence: 77%

Revisiting horizontal transfer of transposable elements in Drosophila

2008

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Horizontal transfer (HT), defined as the transfer of genetic material between species, is considered to be an essential step in the 'life cycle' of transposable elements. We present a broad overview of suspected cases of HT of transposable elements in Drosophila. Hundred-one putative events of HT have been proposed in Drosophila for 21 different elements (5.0% refer to non-long terminal repeat (LTR) retrotransposons, 42.6% to LTR retrotransposons and 52.4% to DNA transposons). We discuss the methods used to infer HT, their limits and the putative vectors of transposable elements. We outline all the alternative hypotheses and ask how we can be almost certain that phylogenetic inconsistencies are due to HT.

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Section: Horizontal Transfer Of Tes Inmentioning

confidence: 77%

Revisiting horizontal transfer of transposable elements in Drosophila

2008

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“…Craft (1938) expanded the list for Mammalia. After 50 years, Coyne and Orr (1989) partly using data from Bock (1984) compiled the list of Drosophila species, followed by Wu and Davis (1993) partly based on data from Gray (1954Gray ( , 1958, who focused on Mammalia and Aves. Laurie (1997) provided a list of all taxa examined thus far.…”

Section: Aimsmentioning

confidence: 99%

Haldane's rule in the 21st century

2011

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Haldane's Rule (HR), which states that 'when in the offspring of two different animal races one sex is absent, rare, or sterile, that sex is the heterozygous (heterogametic) sex', is one of the most general patterns in speciation biology. We review the literature of the past 15 years and find that among the B85 new studies, many consider taxa that traditionally have not been the focus for HR investigations. The new studies increased to nine, the number of 'phylogenetically independent' groups that comply with HR. They continue to support the dominance and faster-male theories as explanations for HR, although due to increased reliance on indirect data (from, for example, differential introgression of cytoplasmic versus chromosomal loci in natural hybrid zones) unambiguous novel results are rare. We further highlight how research on organisms with sex determination systems different from those traditionally considered may lead to more insight in the underlying causes of HR. In particular, haplodiploid organisms provide opportunities for testing specific predictions of the dominance and faster X chromosome theory, and we present new data that show that the faster-male component of HR is supported in hermaphrodites, suggesting that genes involved in male function may evolve faster than those expressed in the female function.

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“…However, a second difficulty in applying the BSC is that reproductive compatibility between taxa in the laboratory is by itself insufficient to show that gene flow occurs in nature. Many taxa can be artificially induced to cross and produce viable and fertile offspring in the laboratory (Bock, 1984;Coyne & Orr, 1989), yet nonetheless may rarely or never mate in the field, even when sympatric (Gill, 1989; reviewed for Drosophila in Block, 1975). Hence, laboratory studies showing reproductive compatibility must be coupled with evidence of hybrid intermediates or of gene flow in the field.…”

Section: Introductionmentioning

confidence: 99%

Molecular and morphological evidence for hybridization between two ecologically distinct grasshoppers (Melanoplus sanguinipes and M. devastator) in California

et al. 1994

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This paper applies the biological species concept to two ecologically distinct species of grasshopper, Melanoplus sanguinipes and M. devastator, by testing for reproductive isolation in the field in California. Two independent techniques for assessing gene flow between species were employed. Firstly, we examined male genitalic morphology in populations from the foothills of the Sierra Nevada where the two species are parapatric. Two genetically based genitalic traits that differed between allopatric populations of each species formed a dine in this zone. Males captured in the field from the region of parapatry resembled offspring from interspecific laboratory hybridizations. Secondly, we surveyed electrophoretic variation of populations from across California and used F statistics to estimate levels of gene flow within and between species. Results from both morphology and F statistics suggested that these grasshoppers are not reproductively isolated in nature hut that gene flow between species is reduced relative to within-species. These field results were consistent with a laboratory study that showed partial hut not complete hybrid egg inviability. Because the hybrid zone is centred along an ecological transition, this system offers an opportunity to investigate whether adaptive changes across the zone contribute to reduced gene flow between species.

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Interspecific Hybridization in the Genus Drosophila

Cited by 85 publications

References 44 publications

Revisiting horizontal transfer of transposable elements in Drosophila

Revisiting horizontal transfer of transposable elements in Drosophila

Haldane's rule in the 21st century

Molecular and morphological evidence for hybridization between two ecologically distinct grasshoppers (Melanoplus sanguinipes and M. devastator) in California

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