Correlated Changes in Body Melanisation and Mating Traits of Drosophila melanogaster: A Seasonal Analysis

Dev, Kapil; Chahal, Jyoti; Parkash, Ravi; Kataria, Sudhir Kumar

doi:10.1007/s11692-012-9220-5

Cited by 4 publications

(3 citation statements)

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“…Although theoretical models suggest that temporal variation in selection pressures can maintain fitness-related genetic variation in populations [1] – [8] and empirical evidence from a variety of species [9] – [39] demonstrates that variation in selection pressures over short time periods does alter phenotypes and allele frequencies, we still lack a basic understanding of many fundamental questions about the genetics and evolutionary history of alleles that undergo rapid adaptation in response to temporal variation in selection pressures. Specifically, we do not know how many loci respond to temporally variable selection within a population, the strength of selection at each locus, nor the effects of such strong selection on neutral genetic differentiation through time.…”

Section: Introductionmentioning

confidence: 99%

“…Chromosomal inversions and allozyme variants in a variety of drosophilids vary among seasons [27][28][29][30][31][32][33] suggesting that these polymorphisms confer differential fitness in alternating seasons. Further, in some species of drosophilids, life-history [34] [35]), morphological [36,37] and stress tolerance traits [38,39] vary among seasons suggesting that these traits respond to seasonal shifts in selection pressures.…”

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confidence: 99%

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Genomic Evidence of Rapid and Stable Adaptive Oscillations over Seasonal Time Scales in Drosophila

et al. 2014

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In many species, genomic data have revealed pervasive adaptive evolution indicated by the fixation of beneficial alleles. However, when selection pressures are highly variable along a species' range or through time adaptive alleles may persist at intermediate frequencies for long periods. So called “balanced polymorphisms” have long been understood to be an important component of standing genetic variation, yet direct evidence of the strength of balancing selection and the stability and prevalence of balanced polymorphisms has remained elusive. We hypothesized that environmental fluctuations among seasons in a North American orchard would impose temporally variable selection on Drosophila melanogaster that would drive repeatable adaptive oscillations at balanced polymorphisms. We identified hundreds of polymorphisms whose frequency oscillates among seasons and argue that these loci are subject to strong, temporally variable selection. We show that these polymorphisms respond to acute and persistent changes in climate and are associated in predictable ways with seasonally variable phenotypes. In addition, our results suggest that adaptively oscillating polymorphisms are likely millions of years old, with some possibly predating the divergence between D. melanogaster and D. simulans. Taken together, our results are consistent with a model of balancing selection wherein rapid temporal fluctuations in climate over generational time promotes adaptive genetic diversity at loci underlying polygenic variation in fitness related phenotypes.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Genomic Evidence of Rapid and Stable Adaptive Oscillations over Seasonal Time Scales in Drosophila

et al. 2014

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“…Pigmentation variation in Drosophila species has been correlated with cuticle strength, fertility, desiccation tolerance, vision, circadian activity, mating and UV resistance (Kalmus, 1941; Fahmy and Fahmy, 1959; Jacobs, 1985; Newby and Jackson, 1991; Borycz et al, 2002; Brisson et al, 2005; Dev et al, 2013; Bastide et al, 2014). In addition to inter-specific patterns in pigmentation, there is also extensive variation within species (Rajpurohit et al, 2008; Parkash et al, 2009a, 2010; Singh et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Latitudinal Pigmentation Variation Contradicts Ultraviolet Radiation Exposure: A Case Study in Tropical Indian Drosophila melanogaster

Rajpurohit

Schmidt

2019

Front. Physiol.

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The effects of ultraviolet radiation (UV) on the animal body have been reported in many studies, and melanin has emerged as a protective mechanism. In smaller insects such as Drosophila, replicated patterns of geographical variation in pigmentation have been observed on multiple continents. Such patterns are particularly pronounced on the Indian subcontinent where several species show a parallel cline in pigmentation traits. However, the potential role of UV exposure in generating the observed patterns of pigmentation variation has not been addressed. Here, we examine the association between UV intensity and body pigmentation in D. melanogaster natural populations collected along the latitudinal gradient of the Indian subcontinent. A strong negative relationship was observed between UV intensity and body pigmentation. This analysis clearly indicates that, in the sampled populations, pigmentation variation is independent of UV exposure and related selection pressures. Patterns of pigmentation in natural populations from the Indian subcontinent are better predicted by latitude itself and temperature-related climatic variables.

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Changes in Body Melanisation and Not Body Size Affect Mating Success in Drosophila immigrans

Singh

2015

New Horizons in Insect Science: Towards Sustainable Pest Management

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Correlated Changes in Body Melanisation and Mating Traits of Drosophila melanogaster: A Seasonal Analysis

Cited by 4 publications

References 47 publications

Genomic Evidence of Rapid and Stable Adaptive Oscillations over Seasonal Time Scales in Drosophila

Genomic Evidence of Rapid and Stable Adaptive Oscillations over Seasonal Time Scales in Drosophila

Latitudinal Pigmentation Variation Contradicts Ultraviolet Radiation Exposure: A Case Study in Tropical Indian Drosophila melanogaster

Changes in Body Melanisation and Not Body Size Affect Mating Success in Drosophila immigrans

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