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  1. Article ; Online: Drosophila yakuba mayottensis, a new model for the study of incipient ecological speciation.

    Yassin, Amir

    Fly

    2016  Volume 11, Issue 1, Page(s) 37–45

    Abstract: A full understanding of how ecological factors drive the fixation of genetic changes during speciation is obscured by the lack of appropriate models with clear natural history and powerful genetic toolkits. In a recent study, we described an early stage ... ...

    Abstract A full understanding of how ecological factors drive the fixation of genetic changes during speciation is obscured by the lack of appropriate models with clear natural history and powerful genetic toolkits. In a recent study, we described an early stage of ecological speciation in a population of the generalist species Drosophila yakuba (melanogaster subgroup) on the island of Mayotte (Indian Ocean). On this island, flies are strongly associated with the toxic fruits of noni (Morinda citrifolia) and show a partial degree of pre-zygotic reproductive isolation. Here, I mine the nuclear and mitochondrial genomes and provide a full morphological description of this population. Only 29 nuclear sites (< 4 × 10
    MeSH term(s) Adaptation, Biological ; Animals ; Comoros ; DNA, Mitochondrial ; Drosophila/classification ; Drosophila/genetics ; Drosophila/physiology ; Ecology ; Genetic Speciation ; Genetic Variation ; Genome, Mitochondrial ; Reproductive Isolation
    Chemical Substances DNA, Mitochondrial
    Language English
    Publishing date 2016-08-11
    Publishing country United States
    Document type Journal Article
    ISSN 1933-6942
    ISSN (online) 1933-6942
    DOI 10.1080/19336934.2016.1221550
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  2. Article: Phylogenetic biogeography and classification of the Drosophila montium species group (Diptera: Drosophilidae)

    Yassin, Amir

    Annales de la Société entomologique de France. 2018 Mar. 4, v. 54, no. 2

    2018  

    Abstract: The Drosophila montium group is the largest clade of the subgenus Sophophora consisting of 94 palaeotropical species, whose phylogenetic relationships remain unclear. Here, I used a recent tree inferred from three nuclear genes and one mitochondrial gene ...

    Abstract The Drosophila montium group is the largest clade of the subgenus Sophophora consisting of 94 palaeotropical species, whose phylogenetic relationships remain unclear. Here, I used a recent tree inferred from three nuclear genes and one mitochondrial gene for almost half of the species to reconstruct the historical biogeography of the group and propose a comprehensive classification for the totality of its species. The group originated in South-East Asia nearly 20 million years ago (mya), and dispersed to Africa in the Late Miocene. A second northward expansion into East Asia took place in the Pliocene. Based on morphological (male abdominal pigmentation and genitalia) and chorological traits congruent with the molecular tree, I divide the montium group into seven subgroups: parvula, montium, punjabiensis, serrata, kikkawai, seguyi and orosa. The polyphyletic status of some of the previously defined complexes (auraria, jambulina, serrata, kikkawai and nikananu) is also resolved.
    Keywords biogeography ; Drosophila ; genitalia ; males ; Miocene epoch ; mitochondrial genes ; pigmentation ; Pliocene epoch ; polyphyly ; trees ; Africa ; France ; South East Asia
    Language English
    Dates of publication 2018-0304
    Size p. 167-175.
    Publishing place Taylor & Francis
    Document type Article
    ISSN 2168-6351
    DOI 10.1080/00379271.2018.1447853
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  3. Article ; Online: Signature of climatic differentiation on mitochondrial DNA of

    Zorzato, Samara Videira / Yassin, Amir / Madi-Ravazzi, Lilian

    Mitochondrial DNA. Part A, DNA mapping, sequencing, and analysis

    2022  Volume 32, Issue 5-8, Page(s) 153–161

    Abstract: Pleistocene climatic changes have played a major role in the evolution of Brazilian Atlantic Forest and South America biodiversity but their impacts on the genetic structure of widely distributed species remain unclear. Here, we investigate mitochondrial ...

    Abstract Pleistocene climatic changes have played a major role in the evolution of Brazilian Atlantic Forest and South America biodiversity but their impacts on the genetic structure of widely distributed species remain unclear. Here, we investigate mitochondrial DNA (mtDNA) diversity in 21 geographical populations of
    Language English
    Publishing date 2022-02-09
    Publishing country England
    Document type Journal Article
    ZDB-ID 2881313-3
    ISSN 2470-1408 ; 2470-1394
    ISSN (online) 2470-1408
    ISSN 2470-1394
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  4. Article: Drosophila yakuba mayottensis, a new model for the study of incipient ecological speciation

    Yassin, Amir

    Fly. 2017 Jan. 2, v. 11, no. 1

    2017  

    Abstract: A full understanding of how ecological factors drive the fixation of genetic changes during speciation is obscured by the lack of appropriate models with clear natural history and powerful genetic toolkits. In a recent study, we described an early stage ... ...

    Abstract A full understanding of how ecological factors drive the fixation of genetic changes during speciation is obscured by the lack of appropriate models with clear natural history and powerful genetic toolkits. In a recent study, we described an early stage of ecological speciation in a population of the generalist species Drosophila yakuba (melanogaster subgroup) on the island of Mayotte (Indian Ocean). On this island, flies are strongly associated with the toxic fruits of noni (Morinda citrifolia) and show a partial degree of pre-zygotic reproductive isolation. Here, I mine the nuclear and mitochondrial genomes and provide a full morphological description of this population. Only 29 nuclear sites (< 4 × 10⁻⁷ of the genome) are fixed in this population and absent from 3 mainland populations and the closest relative D. santomea, but no mitochondrial or morphological character distinguish Mayotte flies from the mainland. This result indicates that physiological and behavioral traits may evolve faster than morphology at the early stages of speciation. Based on these differences, the Mayotte population is designated as a new subspecies, Drosophila yakuba mayottensis subsp. nov., and its strong potential in understanding the genetics of speciation and plant-insect interactions is discussed.
    Keywords Drosophila yakuba ; Melanogaster ; Morinda citrifolia ; environmental factors ; fruits ; mitochondria ; mitochondrial genome ; models ; natural history ; new subspecies ; plant-insect relations ; population ; reproductive isolation ; toxicity ; Comoros ; Indian Ocean
    Language English
    Dates of publication 2017-0102
    Size p. 37-45.
    Publishing place Taylor & Francis
    Document type Article
    Note NAL-light
    ISSN 1933-6942
    DOI 10.1080/19336934.2016.1221550
    Database NAL-Catalogue (AGRICOLA)

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  5. Article ; Online: Long-term evolution of quantitative traits in the Drosophila melanogaster species subgroup.

    Yassin, Amir / Gidaszewski, Nelly / Debat, Vincent / David, Jean R

    Genetica

    2022  Volume 150, Issue 6, Page(s) 343–353

    Abstract: Quantitative genetics aims at untangling the genetic and environmental effects on phenotypic variation. Trait heritability, which summarizes the relative importance of genetic effects, is estimated at the intraspecific level, but theory predicts that ... ...

    Abstract Quantitative genetics aims at untangling the genetic and environmental effects on phenotypic variation. Trait heritability, which summarizes the relative importance of genetic effects, is estimated at the intraspecific level, but theory predicts that heritability could influence long-term evolution of quantitative traits. The phylogenetic signal concept bears resemblance to heritability and it has often been called species-level heritability. Under certain conditions, such as trait neutrality or contribution to phylogenesis, within-species heritability and between-species phylogenetic signal should be correlated. Here, we investigate the potential relationship between these two concepts by examining the evolution of multiple morphological traits for which heritability has been estimated in Drosophila melanogaster. Specifically, we analysed 42 morphological traits in both sexes on a phylogeny inferred from 22 nuclear genes for nine species of the melanogaster subgroup. We used Pagel's λ as a measurement of phylogenetic signal because it is the least influenced by the number of analysed taxa. Pigmentation traits showed the strongest concordance with the phylogeny, but no correlation was found between phylogenetic signal and heritability estimates mined from the literature. We obtained data for multiple climatic variables inferred from the geographical distribution of each species. Phylogenetic regression of quantitative traits on climatic variables showed a significantly positive correlation with heritability. Convergent selection, the response to which depends on the trait heritability, may have led to the null association between phylogenetic signal and heritability for morphological traits in Drosophila. We discuss the possible causes of discrepancy between both statistics and caution against their confusion in evolutionary biology.
    MeSH term(s) Female ; Male ; Animals ; Drosophila melanogaster/genetics ; Phylogeny ; Phenotype ; Drosophila/genetics ; Pigmentation/genetics
    Language English
    Publishing date 2022-10-15
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 2165-9
    ISSN 1573-6857 ; 0016-6707
    ISSN (online) 1573-6857
    ISSN 0016-6707
    DOI 10.1007/s10709-022-00171-9
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  6. Article ; Online: Quantifying the extent of morphological homoplasy: A phylogenetic analysis of 490 characters in

    Al Sayad, Sinan / Yassin, Amir

    Evolution letters

    2019  Volume 3, Issue 3, Page(s) 286–298

    Abstract: Homoplasy is a fundamental phenomenon in evolutionary biology but an appraisal of its extent at the morphological level is still lacking. Here, we analyzed the evolution of 490 morphological characters conceptualized among 56 drosophilid species. We ... ...

    Abstract Homoplasy is a fundamental phenomenon in evolutionary biology but an appraisal of its extent at the morphological level is still lacking. Here, we analyzed the evolution of 490 morphological characters conceptualized among 56 drosophilid species. We found that two thirds of morphological changes were homoplastic and that the level of homoplasy depended on the stage of development and the type of the organ, with the adult terminalia being the least homoplastic. In spite of its predominance at the character change level, homoplasy accounts for only ∼13% of between species similarities in pairwise comparisons. These results provide empirical insights on the limits of morphological changes and the frequency of recurrent evolution.
    Language English
    Publishing date 2019-04-22
    Publishing country England
    Document type Journal Article
    ISSN 2056-3744
    ISSN (online) 2056-3744
    DOI 10.1002/evl3.115
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  7. Article: Unresolved questions in genitalia coevolution: bridging taxonomy, speciation, and developmental genetics

    Yassin, Amir

    Organisms, diversity, & evolution. 2016 Dec., v. 16, no. 4

    2016  

    Abstract: Systematists and geneticists study biological diversity, but they use different approaches that rarely intersect. A very common pattern that is of interest for both researchers is the rapid evolution of genitalia, a trait of significant taxonomic utility ...

    Abstract Systematists and geneticists study biological diversity, but they use different approaches that rarely intersect. A very common pattern that is of interest for both researchers is the rapid evolution of genitalia, a trait of significant taxonomic utility in several sexually reproducing animal clades. The idea that both male and female genitalia are species-specific and play a role in reproductive isolation has long been controversial but has recently gained a renewed interest by speciation and developmental geneticists. Here, I highlight six unresolved questions in genitalia coevolution and I argue that systematists, with their well training in comparative morphology, usage of large and geographically diverse collections, and ability to apply molecular genetics techniques, can make important contributions. Such an extension of systematics into the speciation and developmental genetics realms is a promising opportunity to expand “integrative taxonomy” comparisons between DNA and morphology into more explanatory relationships between the two sources of taxonomic data.
    Keywords animals ; biodiversity ; coevolution ; DNA ; female genitalia ; geneticists ; males ; reproductive isolation ; researchers ; taxonomy
    Language English
    Dates of publication 2016-12
    Size p. 681-688.
    Publishing place Springer Berlin Heidelberg
    Document type Article
    Note Review
    ZDB-ID 2040179-6
    ISSN 1618-1077 ; 1439-6092
    ISSN (online) 1618-1077
    ISSN 1439-6092
    DOI 10.1007/s13127-016-0286-2
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  8. Article ; Online: Long-term evolution of quantitative traits in the Drosophila melanogaster species subgroup

    Yassin, Amir / Gidaszewski, Nelly / Debat, Vincent / David, Jean R.

    Genetica. 2022 Dec., v. 150, no. 6 p.343-353

    2022  

    Abstract: Quantitative genetics aims at untangling the genetic and environmental effects on phenotypic variation. Trait heritability, which summarizes the relative importance of genetic effects, is estimated at the intraspecific level, but theory predicts that ... ...

    Abstract Quantitative genetics aims at untangling the genetic and environmental effects on phenotypic variation. Trait heritability, which summarizes the relative importance of genetic effects, is estimated at the intraspecific level, but theory predicts that heritability could influence long-term evolution of quantitative traits. The phylogenetic signal concept bears resemblance to heritability and it has often been called species-level heritability. Under certain conditions, such as trait neutrality or contribution to phylogenesis, within-species heritability and between-species phylogenetic signal should be correlated. Here, we investigate the potential relationship between these two concepts by examining the evolution of multiple morphological traits for which heritability has been estimated in Drosophila melanogaster. Specifically, we analysed 42 morphological traits in both sexes on a phylogeny inferred from 22 nuclear genes for nine species of the melanogaster subgroup. We used Pagel’s λ as a measurement of phylogenetic signal because it is the least influenced by the number of analysed taxa. Pigmentation traits showed the strongest concordance with the phylogeny, but no correlation was found between phylogenetic signal and heritability estimates mined from the literature. We obtained data for multiple climatic variables inferred from the geographical distribution of each species. Phylogenetic regression of quantitative traits on climatic variables showed a significantly positive correlation with heritability. Convergent selection, the response to which depends on the trait heritability, may have led to the null association between phylogenetic signal and heritability for morphological traits in Drosophila. We discuss the possible causes of discrepancy between both statistics and caution against their confusion in evolutionary biology.
    Keywords Drosophila melanogaster ; geographical distribution ; heritability ; phenotypic variation ; phylogeny ; pigmentation ; statistics
    Language English
    Dates of publication 2022-12
    Size p. 343-353.
    Publishing place Springer International Publishing
    Document type Article ; Online
    ZDB-ID 2165-9
    ISSN 1573-6857 ; 0016-6707
    ISSN (online) 1573-6857
    ISSN 0016-6707
    DOI 10.1007/s10709-022-00171-9
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  9. Article: Evolution of assortative mating following selective introgression of pigmentation genes between two

    David, Jean R / Ferreira, Erina A / Jabaud, Laure / Ogereau, David / Bastide, Héloïse / Yassin, Amir

    Ecology and evolution

    2022  Volume 12, Issue 4, Page(s) e8821

    Abstract: Adaptive introgression is ubiquitous in animals, but experimental support for its role in driving speciation remains scarce. In the absence of conscious selection, admixed laboratory strains ... ...

    Abstract Adaptive introgression is ubiquitous in animals, but experimental support for its role in driving speciation remains scarce. In the absence of conscious selection, admixed laboratory strains of
    Language English
    Publishing date 2022-04-13
    Publishing country England
    Document type Journal Article
    ZDB-ID 2635675-2
    ISSN 2045-7758
    ISSN 2045-7758
    DOI 10.1002/ece3.8821
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  10. Article ; Online: The genome of the blind bee louse fly reveals deep convergences with its social host and illuminates Drosophila origins.

    Bastide, Héloïse / Legout, Hélène / Dogbo, Noé / Ogereau, David / Prediger, Carolina / Carcaud, Julie / Filée, Jonathan / Garnery, Lionel / Gilbert, Clément / Marion-Poll, Frédéric / Requier, Fabrice / Sandoz, Jean-Christophe / Yassin, Amir

    Current biology : CB

    2024  Volume 34, Issue 5, Page(s) 1122–1132.e5

    Abstract: Social insects' nests harbor intruders known as inquilines, ...

    Abstract Social insects' nests harbor intruders known as inquilines,
    MeSH term(s) Bees/genetics ; Animals ; Drosophila/genetics ; Drosophila melanogaster/genetics ; Phthiraptera/genetics ; Receptors, Cell Surface/genetics ; Genes, Insect ; Pheromones
    Chemical Substances Receptors, Cell Surface ; Pheromones
    Language English
    Publishing date 2024-02-02
    Publishing country England
    Document type Journal Article
    ZDB-ID 1071731-6
    ISSN 1879-0445 ; 0960-9822
    ISSN (online) 1879-0445
    ISSN 0960-9822
    DOI 10.1016/j.cub.2024.01.034
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    In stock of ZB MED Cologne/Königswinter

    Zs.A 3208: Show issues Location:
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