Fine-scale genetic analysis of species-specific female preference in Drosophila simulans

2012 ◽  
Vol 25 (9) ◽  
pp. 1718-1731 ◽  
Author(s):  
M. Laturney ◽  
A. J. Moehring
Keyword(s):  
Genetic Analysis ◽  
Female Preference ◽  
Drosophila Simulans ◽  
Fine Scale ◽  
Species Specific

scholarly journals A Quantitative Genetic Analysis of Male Sexual Traits Distinguishing the Sibling Species Drosophila simulans and D. sechellia

Genetics ◽  
1999 ◽  
Vol 153 (4) ◽  
pp. 1683-1699 ◽  
Author(s):  
Stuart J Macdonald ◽  
David B Goldstein
Keyword(s):  
Genetic Analysis ◽  
Sibling Species ◽  
Reproductive Traits ◽  
Drosophila Simulans ◽  
Directional Selection ◽  
Posterior Lobe ◽  
Sex Comb ◽  
Tooth Number ◽  
Comb Tooth ◽  
Shape And Size

Abstract A quantitative trait locus (QTL) genetic analysis of morphological and reproductive traits distinguishing the sibling species Drosophila simulans and D. sechellia was carried out in a backcross design, using 38 markers with an average spacing of 8.4 cM. The direction of QTL effects for the size of the posterior lobe was consistent across the identified QTL, indicating directional selection for this trait. Directional selection also appears to have acted on testis length, indicating that sexual selection may have influenced many reproductive traits, although other forms of directional selection cannot be ruled out. Sex comb tooth number exhibited high levels of variation both within and among isofemale lines and showed no evidence for directional selection and, therefore, may not have been involved in the early speciation process. A database search for genes associated with significant QTL revealed a set of candidate loci for posterior lobe shape and size, sex comb tooth number, testis length, tibia length, and hybrid male fertility. In particular, decapentaplegic (dpp), a gene known to influence the genital arch, was found to be associated with the largest LOD peak for posterior lobe shape and size.

scholarly journals Genetics of sexual isolation in male hybrids of Drosophila simulans and D. mauritiana

1996 ◽  
Vol 68 (3) ◽  
pp. 211-220 ◽  
Author(s):  
Jerry A. Coyne
Keyword(s):  
Genetic Analysis ◽  
Y Chromosome ◽  
Sibling Species ◽  
Previous Analysis ◽  
Sexual Isolation ◽  
Drosophila Simulans

SummarySexual isolation between the sibling species D. simulans and D. mauritiana is due largely to the rejection of D. simulans males by D. mauritiana females. Genetic analysis shows that genes on the X and third chromosomes contribute to the differences between males causing sexual isolation, while the Y chromosome, second chromosome and cytoplasm have no effect. These chromosome effects differ from those observed in a previous analysis of sexual isolation in hybrid females, implying that different genes cause sexual isolation in the two sexes.

A new dendroecological method to differentiate growth responses to fine-scale disturbance from regional-scale environmental variation

2007 ◽  
Vol 37 (6) ◽  
pp. 1034-1043 ◽  
Author(s):  
R. Douglas Thompson ◽  
Lori D. Daniels ◽  
Kathy J. Lewis
Keyword(s):  
Tree Mortality ◽  
Regional Scale ◽  
Ring Width ◽  
Environmental Variation ◽  
Fine Scale ◽  
Growth Responses ◽  
Data Set ◽  
Complementary Approach ◽  
Residual Series ◽  
Species Specific

A new dendroecological method is developed to differentiate growth responses to fine-scale disturbance from regional-scale environmental variation. In spruce–fir forests of central British Columbia, release from suppression in response to overhead canopy tree mortality was calibrated as >60% change in radial growth (%CRG, adjacent 15 year periods compared) using gap-maker–gap-filler pairs with known years of mortality and response. Many release events, attributed to regional-scale environmental variation (e.g., bark beetle outbreaks), were counted. Species-specific regional-scale chronologies were subtracted from standardized gap-filler series producing residuals and 1 was added to all residual indices. Percent divergence (%DIV) values were calculated as the percent change in residuals (adjacent 15 year periods compared). A %DIV criterion was set at >15% increase in the residual series. The %CRG and %DIV criteria were applied to an independent data set of ring-width series, determining the date(s) of release for each tree. %CRG and %DIV criteria were used in a complementary approach to differentiate (i) release due to fine-scale canopy gaps, (ii) no response to a gap and regional-scale environmental variation, (iii) release due to regional-scale environmental variation, and (iv) response to a fine-scale canopy gap but not detected by the %CRG criterion.

Molecular transfer of a species-specific behavior from Drosophila simulans to Drosophila melanogaster

Science ◽  
1991 ◽  
Vol 251 (4997) ◽  
pp. 1082-1085 ◽  
Author(s):  
D. Wheeler ◽  
C. Kyriacou ◽  
M. Greenacre ◽  
Q Yu ◽  
J. Rutila ◽  
...  
Keyword(s):  
Drosophila Melanogaster ◽  
Drosophila Simulans ◽  
Specific Behavior ◽  
Molecular Transfer ◽  
Species Specific

scholarly journals Genetic Analysis and Species Specific Amplification of the Artemisinin Resistance-Associated Kelch Propeller Domain in P. falciparum and P. vivax

PLoS ONE ◽  
2015 ◽  
Vol 10 (8) ◽  
pp. e0136099 ◽  
Author(s):  
Eldin Talundzic ◽  
Stella M. Chenet ◽  
Ira F. Goldman ◽  
Dhruviben S. Patel ◽  
Julia A. Nelson ◽  
...  
Keyword(s):  
Genetic Analysis ◽  
Artemisinin Resistance ◽  
Specific Amplification ◽  
Species Specific

Abundance, spatial distribution and habitat relationships of echinoderms in the Cabo Verde Archipelago (eastern Atlantic)

2008 ◽  
Vol 59 (6) ◽  
pp. 477 ◽  
Author(s):  
Laura Entrambasaguas ◽  
Ángel Pérez-Ruzafa ◽  
Jose A. García-Charton ◽  
Ben Stobart ◽  
Juan José Bacallado
Keyword(s):  
Spatial Variability ◽  
Habitat Structure ◽  
Sea Urchins ◽  
Spatial Scales ◽  
Benthic Communities ◽  
Fine Scale ◽  
Cabo Verde ◽  
Heterogeneous Habitats ◽  
Species Abundances ◽  
Species Specific

The analysis of spatial variability in distribution and abundance of echinoderms may help in identifying the range of processes that can explain the observed patterns of this important component of benthic communities. The distribution and abundance of the echinoderm assemblage inhabiting the shallow rocky reefs at the Cabo Verde archipelago (where few studies other than descriptive ones have been performed until now) was quantified at three spatial scales (among islands, between locations within islands, and among replicates), at two depth strata, and related to fine-scale variation of habitat structure. Total echinoderm abundance and the abundance of the sea urchins Diadema antillarum and Eucidaris tribuloides, and the holothurian Euapta lappa were heterogeneous at the largest considered scale. Most species and habitat descriptors exhibited spatial variability at finer scales. There were significant relationships between habitat architecture and depth and both assemblage parameters and species abundances. Although the effects of habitat structure were species-specific, the probability of occurrence of Asteroidea, Ophiuroidea and Holothuroidea species was higher in heterogeneous habitats. Meanwhile Echinoidea and Holothuroidea species showed higher correlations to complex habitats. The observed spatial patterns are inferred to reflect behavioural responses to fine-scale microhabitat complexity, as well as broad-scale oceanic variables and recruitment dynamics.

scholarly journals Molecular signature of epistatic selection: interrogating genetic interactions in the sex-ratio meiotic drive of Drosophila simulans

2009 ◽  
Vol 91 (3) ◽  
pp. 171-182 ◽  
Author(s):  
LUIS-MIGUEL CHEVIN ◽  
HÉLOÏSE BASTIDE ◽  
CATHERINE MONTCHAMP-MOREAU ◽  
FRÉDÉRIC HOSPITAL
Keyword(s):  
Sex Ratio ◽  
Initial Conditions ◽  
Meiotic Drive ◽  
Real Data ◽  
Genomic Region ◽  
Drosophila Simulans ◽  
Stochastic Simulations ◽  
Molecular Signature ◽  
Fine Scale ◽  
Rich Data

SummaryFine scale analyses of signatures of selection allow assessing quantitative aspects of a species' evolutionary genetic history, such as the strength of selection on genes. When several selected loci lie in the same genomic region, their epistatic interactions may also be investigated. Here, we study how the neutral polymorphism pattern was shaped by two close recombining loci that cause ‘sex-ratio’ meiotic drive in Drosophila simulans, as an example of strong selection with potentially strong epistasis. We compare the polymorphism data observed in a natural population with the results of forward stochastic simulations under several contexts of epistasis between the candidate loci for the drive. We compute the likelihood of different possible scenarios, in order to determine which configuration is most consistent with the data. Our results highlight that fine scale analyses of well-chosen candidate genomic regions provide information-rich data that can be used to investigate the genotype–phenotype–fitness map, which can hardly be studied in genome-wide analyses. We also emphasize that initial conditions and time of observation (here, time after the interruption of a partial selective sweep) are crucial parameters in the interpretation of real data, while these are often overlooked in theoretical studies.

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