NATURAL SELECTION FOR REPRODUCTIVE ISOLATION BETWEENDROSOPHILA PSEUDOOBSCURAANDDROSOPHILA PERSIMILIS

Koopman, Karl F.

doi:10.1111/j.1558-5646.1950.tb00048.x

Cited by 98 publications

(52 citation statements)

References 11 publications

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“…persimilis, Koopman (1950) showed a very rapid increase in the amount of reproductive isolation between the two species as a result of natural selection over a few generations. Knight, Robertson and Waddington (1956) selected successfully for sexual isolation between flies carrying the mutants vg (vestigial) and e (ebony), which initially showed only weak positive assortative mating.…”

Section: Discussionmentioning

confidence: 99%

Assortative mating for a metrical characteristic in Drosophila

1965

Heredity

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Section: Discussionmentioning

confidence: 99%

Assortative mating for a metrical characteristic in Drosophila

1965

Heredity

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“…Several of the experiments (Koopman 1950;Kessler 1966;Dobzhansky et al 1976) involved selection for assortative matings between populations already, to a greater or lesser degree, sexually isolated. To avoid possible bias from such potential`head starts' we introduced another variable, hybrid frequency change ( H), to quantitatively determine to what extent a certain experiment should be considered successful.…”

Section: Methodsmentioning

confidence: 99%

Effective population size may limit the power of laboratory experiments to demonstrate sympatric and parapatric speciation

Ödeen

Florin

2000

Proc. R. Soc. Lond. B

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Laboratory experiments designed to elucidate the mechanisms of sympatric and parapatric speciation may have been handicapped by too small population sizes, although this possibility has seldom been discussed. In this paper we review the published records of sympatric and parapatric speciation experiments to test the relative importance of selection intensity applied, duration of experiment and e¡ective population size. Our results show that among these factors only e¡ective population size has had a general e¡ect on the generation of assortative mating. Reduced interbreeding is less likely to develop in small populations where the selection process often seems to have been opposed by inbreeding depression or loss of genetic variation. This study demonstrates that the experimental evidence frequently used as an argument against sympatric and parapatric speciation models is not as strong as previously believed.

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“…That isolating mechanisms may develop by natural and artificial selection has been shown by Koopman (1950), Wallace (1954), Knight, Robertson and Waddington (1956), Hoenigsberg (1964), and Kessler (1966).…”

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confidence: 99%