Genetic Differentiation Within the Melanogaster Species Group of the Genus Drosophila (Sophophora)

Evolution ◽  
1979 ◽  
Vol 33 (4) ◽  
pp. 1063 ◽  
Author(s):  
Karel T. Eisses ◽  
Henk van Dijk ◽  
Wilke van Delden
Keyword(s):  
Genetic Differentiation ◽  
Species Group

scholarly journals The speciation history of the Drosophila nasuta complex

2006 ◽  
Vol 88 (1) ◽  
pp. 13-26 ◽  
Author(s):  
DORIS BACHTROG
Keyword(s):  
Genetic Differentiation ◽  
Population Genetic ◽  
Species Group ◽  
Similar Species ◽  
Nucleotide Polymorphisms ◽  
Effective Population ◽  
Genetic Analyses ◽  
Nucleotide Variability ◽  
Drosophila Nasuta ◽  
Population Genetic Analyses

The Drosophila nasuta subgroup of the immigrans species group is widely distributed throughout the South-East Asian region, consisting of morphologically similar species with varying degrees of reproductive isolation. Here, I report nucleotide variability data for five X-linked and two mtDNA loci in eight taxa from the nasuta subgroup, with deeper sampling from D. albomicans and its sister species D. nasuta. Phylogenetic relationships among these species vary among different genomic regions, and levels of genetic differentiation suggest that this species group diversified only about one million years ago. D. albomicans and D. nasuta share nucleotide polymorphisms and are distinguished by relatively few fixed differences. Patterns of genetic differentiation between this species pair are compatible with a simple isolation model with no gene flow. Nucleotide variability levels of species in the nasuta group are comparable to those in members of the melanogaster and pseudoobscura species groups, indicating effective population sizes on the order of several million. Population genetic analyses reveal that summaries of the frequency distribution of neutral polymorphisms in both D. albomicans and D. nasuta generally fit the assumptions of the standard neutral model. D. albomicans is of particular interest for evolutionary studies because of its recently formed neo-sex chromosomes, and our phylogenetic and population genetic analyses suggest that it might be an ideal model to study the very early stages of Y chromosome evolution.

Genetic Differentiation and Taxonomy in the House Wren Species Group

The Condor ◽  
1996 ◽  
Vol 98 (3) ◽  
pp. 547-556 ◽  
Author(s):  
Robb T. Brumfield ◽  
A. P. Capparella
Keyword(s):  
Genetic Differentiation ◽  
Species Group ◽  
House Wren

scholarly journals GENETIC DIFFERENTIATION WITHIN THE MELANOGASTER SPECIES GROUP OF THE GENUS DROSOPHILA (SOPHOPHORA)

Evolution ◽  
1979 ◽  
Vol 33 (4) ◽  
pp. 1063-1068 ◽  
Author(s):  
Karel T. Eisses ◽  
Henk van Dijk ◽  
Wilke van Delden
Keyword(s):  
Genetic Differentiation ◽  
Species Group

scholarly journals Genotyping-by-sequencing supports a genetic basis for alpine wing-reduction in a New Zealand stonefly

2018 ◽  
Author(s):  
Andrew J. Veale ◽  
Brodie J. Foster ◽  
Peter K. Dearden ◽  
Jonathan M. Waters
Keyword(s):  
New Zealand ◽  
Genetic Differentiation ◽  
Genetic Basis ◽  
Genotyping By Sequencing ◽  
Species Group ◽  
Wing Polymorphism ◽  
Regulatory Pathways ◽  
Population Genetic Differentiation ◽  
Wing Reduction ◽  
Outlier Loci

AbstractWing polymorphism is a prominent feature of numerous insect groups, but the genomic basis for this diversity remains poorly understood. Wing reduction is a commonly observed trait in many species of stoneflies, particularly in cold or alpine environments. The widespread New Zealand stonefly Zelandoperla fenestrata species group (Z. fenestrata, Z. tillyardi, Z. pennulata) contains populations ranging from long-winged (macropterous) to vestigial-winged (micropterous), with the latter phenotype typically associated with high altitudes. The presence of flightless forms on numerous mountain ranges, separated by lowland fully winged populations, suggests wing reduction has occurred multiple times. We use Genotyping by Sequencing (GBS) to test for genetic differentiation between fully winged (n=62) and vestigial-winged (n=34) individuals, sampled from a sympatric population of distinct wing morphotypes, to test for a genetic basis for wing morphology. We found no population genetic differentiation between these two morphotypes across 6,843 SNP loci, however we did detect several outlier loci that strongly differentiated morphotypes across independent tests. This indicates small regions of the genome are likely to be highly differentiated between morphotypes, indicating a genetic basis for morphotype differentiation. These results provide a clear basis for ongoing genomic analysis to elucidate critical regulatory pathways for wing development in Pterygota.

Genetic divergence within the Drosophila mayaguana subcluster, a closely related triad of Caribbean species in the repleta species group

Hereditas ◽  
2002 ◽  
Vol 136 (3) ◽  
pp. 240-246 ◽  
Author(s):  
P. M. O'GRADY ◽  
C. M. DURANDO ◽  
W. B. HEED ◽  
M. WASSERMAN ◽  
W. ETGES ◽  
...  
Keyword(s):  
Genetic Divergence ◽  
Species Group
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