Natural Selection for Reproductive Isolation Between Drosophila pseudoobscura and Drosophila persimilis

Evolution ◽  
1950 ◽  
Vol 4 (2) ◽  
pp. 135 ◽  
Author(s):  
Karl F. Koopman
Keyword(s):  
Natural Selection ◽  
Reproductive Isolation ◽  
Drosophila Pseudoobscura ◽  
Drosophila Persimilis ◽  
Selection For

scholarly journals NATURAL SELECTION VS. RANDOM DRIFT: EVIDENCE FROM TEMPORAL VARIATION IN ALLELE FREQUENCIES IN NATURE

Genetics ◽  
1985 ◽  
Vol 111 (3) ◽  
pp. 517-554
Author(s):  
Laurence D Mueller ◽  
Lorraine G Barr ◽  
Francisco J Ayala
Keyword(s):  
Natural Selection ◽  
Strong Evidence ◽  
Allele Frequencies ◽  
Drosophila Pseudoobscura ◽  
Frequency Variation ◽  
Random Drift ◽  
Napa County ◽  
Environmental Variations ◽  
Monthly Sample ◽  
Drosophila Persimilis

ABSTRACT We have obtained monthly samples of two species, Drosophila pseudoobscura and Drosophila persimilis, in a natural population from Napa County, California. In each species, about 300 genes have been assayed by electrophoresis for each of seven enzyme loci in each monthly sample from March 1972 to June 1975. Using statistical methods developed for the purpose, we have examined whether the allele frequencies at different loci vary in a correlated fashion. The methods used do not detect natural selection when it is deterministic (e.g., overdominance or directional selection), but only when alleles at different loci vary simultaneously in response to the same environmental variations. Moreover, only relatively large fitness differences (of the order of 15%) are detectable. We have found strong evidence of correlated allele frequency variation in 13-20% of the cases examined. We interpret this as evidence that natural selection plays a major role in the evolution of protein polymorphisms in nature.

scholarly journals NATURAL SELECTION FOR REPRODUCTIVE ISOLATION INPHLOX

Evolution ◽  
1967 ◽  
Vol 21 (4) ◽  
pp. 679-687 ◽  
Author(s):  
Donald A. Levin ◽  
Harold W. Kerster
Keyword(s):  
Natural Selection ◽  
Reproductive Isolation ◽  
Selection For

scholarly journals Evidence for natural selection and barrier leakage in candidate loci underlying speciation in wood ants

2018 ◽  
Author(s):  
J Kulmuni ◽  
P Nouhaud ◽  
L Pluckrose ◽  
I Satokangas ◽  
K Dhaygude ◽  
...  
Keyword(s):  
Survival Analysis ◽  
Gene Flow ◽  
Natural Selection ◽  
Reproductive Isolation ◽  
Temporal Variation ◽  
Real Time ◽  
Genome Scans ◽  
Wood Ants ◽  
Selection For ◽  
Candidate Loci

AbstractWhile speciation underlies novel biodiversity, it is poorly understood how natural selection shapes genomes during speciation. Selection is assumed to act against gene flow at barrier loci, promoting reproductive isolation and speciation. However, evidence for gene flow and selection is often indirect. Here we utilize haplodiploidy to identify candidate barrier loci in hybrids between two wood ant species and integrate survival analysis to directly measure if natural selection is acting at candidate barrier loci. We find multiple candidate barrier loci but surprisingly, proportion of them show leakage between samples collected ten years apart, natural selection favoring leakage in the latest sample. Barrier leakage and natural selection for introgressed alleles could be due to environment-dependent selection, emphasizing the need to consider temporal variation in natural selection in future speciation work. Integrating data on survival allows us to move beyond genome scans, demonstrating natural selection acting on hybrid genomes in real-time.

Natural Selection for Reproductive Isolation in Phlox

Evolution ◽  
1967 ◽  
Vol 21 (4) ◽  
pp. 679 ◽  
Author(s):  
Donald A. Levin ◽  
Harold W. Kerster
Keyword(s):  
Natural Selection ◽  
Reproductive Isolation ◽  
Selection For
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