An old bilbo-like non-LTR retroelement insertion provides insight into the relationship of species of the virilis group

Reis, Micael; Vieira, Cristina; Morales‐Hojas, Ramiro; Vieira, Jorge

doi:10.1016/j.gene.2008.08.010

Cited by 11 publications

(19 citation statements)

References 46 publications

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“…Figures 2 and 3 show the phylogenies of the species obtained for TL and SRL trait, respectively. The congruence of the relationship between the species was confirmed in recent papers by Huey et al (2006) and Gao et al (2007) for the obscura group, and by Reis et al (2008) for the virilis group. For each group of species having at least two values, the mean of the trait (TL and SRL, respectively) is given with the CV in parentheses.…”

Section: Methodsmentioning

confidence: 61%

Coevolution of male and female reproductive structures in Drosophila

Joly¹,

Schiffer²

2009

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The morphology of male genitalia whilst stable within species, exhibits huge interspecific variation. This variation is likely to be as a result of sexual selection due to the direct involvement of these reproductive structures in mating and sperm transfer. In contrast, internal soft tissue components of the genitalia are generally poorly investigated as they are not directly involved in physical and mechanical adequacy during sperm transfer. However, these soft tissue structures may also drive differential male-female interactions, particularly in internally fertilising organisms where females have the ability to store sperm and bias male reproductive success. In this paper we use the drosophila model to investigate the role of male and female reproductive elements in sexual selection. Our meta-analysis supplemented with additional new data clearly shows that within species, sperm length versus testis length, and sperm length versus seminal receptacle length, are highly correlated. Thus, independent of the phylogenetic relationship among species, gamete evolution is likely to result in sexual selection interactions that drive the evolution of internal reproductive components in both sexes. Our results and discussion of the literature highlight the importance of considering internal soft structures that may influence fertilisation, when investigating selective forces acting on the evolution of reproductive traits.

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Section: Methodsmentioning

confidence: 61%

Coevolution of male and female reproductive structures in Drosophila

Joly¹,

Schiffer²

2009

Genetica

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“…However, as we have only one line per species we cannot distinguish intraand inter-specific sources of genetic variation. Yet, as the species separated 9-11 mya (Reis et al, 2008;Morales-Hojas et al, 2011) it seems most likely that interspecific differences will dominate the main differences described here. Future population-level work is required to explore the extent of differences within species.…”

Section: Go Term Enrichment Analysismentioning

confidence: 86%

“…These species belong to the D. virilis species group, and diverged from each other approximately 9-11 mya (Reis et al, 2008;Morales-Hojas et al, 2011). Both species show a high level of cold tolerance compared to other drosophilids, and D. montana is significantly more cold tolerant than D. virilis (Kellermann et al, 2012;Vesala et al, 2012b).…”

Section: Introductionmentioning

confidence: 98%

How consistent are the transcriptome changes associated with cold acclimation in two species of the Drosophila virilis group?

et al. 2015

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For many organisms the ability to cold acclimate with the onset of seasonal cold has major implications for their fitness. In insects, where this ability is widespread, the physiological changes associated with increased cold tolerance have been well studied. Despite this, little work has been done to trace changes in gene expression during cold acclimation that lead to an increase in cold tolerance. We used an RNA-Seq approach to investigate this in two species of the Drosophila virilis group. We found that the majority of genes that are differentially expressed during cold acclimation differ between the two species. Despite this, the biological processes associated with the differentially expressed genes were broadly similar in the two species. These included: metabolism, cell membrane composition, and circadian rhythms, which are largely consistent with previous work on cold acclimation/cold tolerance. In addition, we also found evidence of the involvement of the rhodopsin pathway in cold acclimation, a pathway that has been recently linked to thermotaxis. Interestingly, we found no evidence of differential expression of stress genes implying that long-term cold acclimation and short-term stress response may have a different physiological basis.

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“…Ten alleles of gene CG9631 have been sequenced from nine strains of D. americana (ML97-5, H1, H9, H18, LA11, LA12, LA25, LA26 and LA35; for details on the strains Adaptive evolution in immunity genes of Drosophila R Morales-Hojas et al see Reis et al, 2008). McDonald-Kreitman tests were run in DnaSP 4.50.3 (Rozas et al, 2003).…”

Section: Intraspecific Analysesmentioning

confidence: 99%

Comparative analysis of five immunity-related genes reveals different levels of adaptive evolution in the virilis and melanogaster groups of Drosophila

et al. 2009

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Five immunity-related genes previously reported to be evolving under positive selection in Drosophila melanogaster and D. simulans have been analysed across the Drosophila genus using two types of approaches, random-site and branch-site likelihood models as well as the proportion of synonymous and non-synonymous variation within and between species. Different selective pressures have been detected in the sample of genes, one showing evidence for adaptive evolution across the phylogeny of Drosophila and two showing lineage-specific positive selection. Furthermore, amino-acid sites identified as being under positive selection in the melanogaster and the virilis groups are different, suggesting that the evolution of the proteins in these two divergent groups may have been shaped by different pathogens.

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An old bilbo-like non-LTR retroelement insertion provides insight into the relationship of species of the virilis group

Cited by 11 publications

References 46 publications

Coevolution of male and female reproductive structures in Drosophila

Coevolution of male and female reproductive structures in Drosophila

How consistent are the transcriptome changes associated with cold acclimation in two species of the Drosophila virilis group?

Comparative analysis of five immunity-related genes reveals different levels of adaptive evolution in the virilis and melanogaster groups of Drosophila

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