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Zelditch ML, Swiderski DL. Effects of Procrustes Superimposition and Semilandmark Sliding on Modularity and Integration: An Investigation Using Simulations of Biological Data. Evol Biol 2023. [DOI: 10.1007/s11692-023-09600-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
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Dubied M, Montuire S, Navarro N. Commonalities and evolutionary divergences of mandible shape ontogenies in rodents. J Evol Biol 2021; 34:1637-1652. [PMID: 34449936 DOI: 10.1111/jeb.13920] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 08/17/2021] [Accepted: 08/19/2021] [Indexed: 11/27/2022]
Abstract
In mammals, significant changes take place during postnatal growth, linked to changes in diet (from sucking to gnawing). During this period, mandible development is highly interconnected with muscle growth and the epigenetic interactions between muscle and bone control the spatialization of bone formation and remodelling in response to biomechanical strain. This mechanism contributes to postnatal developmental plasticity and may have influenced the course of evolutionary divergences between species and clades. We sought to model postnatal changes at a macroevolutionary scale by analysing ontogenetic trajectories of mandible shape across 16 species belonging mainly to two suborders of Rodents, Myomorpha and Hystricomorpha, which differ in muscle attachments, tooth growth and life-history traits. Myomorpha species present a much stronger magnitude of changes over a shorter growth period. Among Hystricomorpha, part of the observed adult shape is set up prenatally, and most postnatal trajectories are genus-specific, which agrees with nonlinear developmental trajectories over longer gestational periods. Beside divergence at large scale, we find some collinearities between evolutionary and developmental trajectories. A common developmental trend was also observed, leading to enlargement of the masseter fossa during postnatal growth. The tooth growth, especially hypselodonty, seems to be a major driver of divergences of postnatal trajectories. These muscle- and tooth-related effects on postnatal trajectories suggest opportunities for developmental plasticity in the evolution of the mandible shape, opportunities that may have differed across Rodent clades.
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Affiliation(s)
- Morgane Dubied
- Biogeosciences, UMR 6282 CNRS, EPHE, Université Bourgogne Franche-Comté, Dijon, France
| | - Sophie Montuire
- Biogeosciences, UMR 6282 CNRS, EPHE, Université Bourgogne Franche-Comté, Dijon, France.,EPHE, PSL University, Paris, France
| | - Nicolas Navarro
- Biogeosciences, UMR 6282 CNRS, EPHE, Université Bourgogne Franche-Comté, Dijon, France.,EPHE, PSL University, Paris, France
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Billet G, Bardin J. Segmental series and size: clade-wide investigation of molar proportions reveals a major evolutionary allometry in the dentition of placental mammals. Syst Biol 2021; 70:1101-1109. [PMID: 33560370 DOI: 10.1093/sysbio/syab007] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 01/27/2021] [Accepted: 02/05/2021] [Indexed: 11/14/2022] Open
Abstract
Iterative segments such as teeth or limbs are a widespread characteristic of living organisms. While their proportions may be governed by similar developmental rules in vertebrates, there is no emerging pattern as regards their relation to size. Placental mammals span eight orders of magnitude in body size and show a wide spectrum of dietary habits associated with size and reflected in their dentitions, especially molars. Although variation in size constitutes an important determinant for variation in biological traits, few major allometric trends have been documented on placental molars so far. Molar proportions have been intensively explored in placentals in relation to developmental models, but often at a small phylogenetic scale. Here, we analyzed the diversity of upper molar proportions in relation to absolute size in a large sample of placental species (n = 286) encompassing most of the group's dental diversity. Our phylogenetically informed analyses revealed a twofold pattern of evolutionary integration among upper molars: while molars covary in size with each other, their proportions covary with the absolute size of the entire molar field. With increasing absolute size, posterior molars increase in size relative to anterior ones, meaning that large-sized species have relatively large rear molars while the opposite is true for small-sized species. The directionality of proportional increase in the molar row exhibits a previously unsuspected allometric patterning among placentals, showing how large-scale variations in size may have influenced variation in dental morphology. This finding provides new evidence that processes regulating the size of individual molars are integrated with overall patterns of growth and calls for further testing of allometric variation in the dentition and in other segmental series of the vertebrate body.
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Affiliation(s)
- Guillaume Billet
- Centre de Recherche en Paléontologie - Paris, CR2P, Muséum national d'Histoire naturelle, CNRS, Sorbonne Université, 8 rue Buffon 75005 Paris, France
| | - Jérémie Bardin
- Centre de Recherche en Paléontologie - Paris, CR2P, Sorbonne Université, Muséum national d'Histoire naturelle, CNRS, T.46-56, E.5, case 104, 4 place Jussieu, 75252 Paris cedex 05, France
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Hayden L, Lochovska K, Sémon M, Renaud S, Delignette-Muller ML, Vilcot M, Peterkova R, Hovorakova M, Pantalacci S. Developmental variability channels mouse molar evolution. eLife 2020; 9:50103. [PMID: 32048989 PMCID: PMC7182435 DOI: 10.7554/elife.50103] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Accepted: 02/02/2020] [Indexed: 12/30/2022] Open
Abstract
Do developmental systems preferentially produce certain types of variation that orient phenotypic evolution along preferred directions? At different scales, from the intra-population to the interspecific, the murine first upper molar shows repeated anterior elongation. Using a novel quantitative approach to compare the development of two mouse strains with short or long molars, we identified temporal, spatial and functional differences in tooth signaling center activity, that arise from differential tuning of the activation-inhibition mechanisms underlying tooth patterning. By tracing their fate, we could explain why only the upper first molar reacts via elongation of its anterior part. Despite a lack of genetic variation, individuals of the elongated strain varied in tooth length and the temporal dynamics of their signaling centers, highlighting the intrinsic instability of the upper molar developmental system. Collectively, these results reveal the variational properties of murine molar development that drive morphological evolution along a line of least resistance. Over time species develop random mutations in their genetic sequence that causes their form to change. If this new form increases the survival of a species it will become favored through natural selection and is more likely to get passed on to future generations. But, the evolution of these new traits also depends on what happens during development. Developmental mechanisms control how an embryo progresses from a single cell to an adult organism made of many cells. Mutations that alter these processes can influence the physical outcome of development, and cause a new trait to form. This means that if many different mutations alter development in a similar way, this can lead to the same physical change, making it ‘easy’ for a new trait to repeatedly occur. Most of the research has focused on finding the mutations that underlie repeated evolution, but rarely on identifying the role of the underlying developmental mechanisms. To bridge this gap, Hayden et al. investigated how changes during development influence the shape and size of molar teeth in mice. In some wild species of mice, the front part of the first upper molar is longer than in other species. This elongation, which is repeatedly found in mice from different islands, likely came from developmental mechanisms. Tooth development in mice has been well-studied in the laboratory, and Hayden et al. started by identifying two strains of laboratory mice that mimic the teeth seen in their wild cousins, one with elongated upper first molars and another with short ones. Comparing how these two strains of mice developed their elongated or short teeth revealed key differences in the embryonic structures that form the upper molar and cause it to elongate. Further work showed that variations in these embryonic structures can even cause mice that are genetically identical to have longer or shorter upper first molars. These findings show how early differences during development can lead to small variations in form between adult species of mice. This study highlights how studying developmental differences as well as genetic sequences can further our understanding of how different species evolved.
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Affiliation(s)
- Luke Hayden
- Laboratoire de Biologie et Modélisation de la Cellule, Université de Lyon, CNRS UMR 5239, Ecole Normale Supérieure de Lyon, Université Claude Bernard Lyon1, INSERM U1210, Lyon, France.,Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, CNRS UMR 5242, Ecole Normale Supérieure de Lyon, Université Claude Bernard Lyon 1, Lyon, France
| | - Katerina Lochovska
- 1st Department of Medicine, First Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czech Republic
| | - Marie Sémon
- Laboratoire de Biologie et Modélisation de la Cellule, Université de Lyon, CNRS UMR 5239, Ecole Normale Supérieure de Lyon, Université Claude Bernard Lyon1, INSERM U1210, Lyon, France
| | - Sabrina Renaud
- Laboratoire de Biométrie et Biologie Evolutive, Université de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5558, VetAgro Sup, Villeurbanne, France
| | - Marie-Laure Delignette-Muller
- Laboratoire de Biométrie et Biologie Evolutive, Université de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5558, VetAgro Sup, Villeurbanne, France
| | - Maurine Vilcot
- Master de Biologie, École Normale Supérieure de Lyon, Université Claude Bernard Lyon I, Université de Lyon, Lyon, France
| | - Renata Peterkova
- Department of Histology and Embryology, Third Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Maria Hovorakova
- Department of Developmental Biology, Institute of Experimental Medicine, The Czech Academy of Sciences, Prague, Czech Republic
| | - Sophie Pantalacci
- Laboratoire de Biologie et Modélisation de la Cellule, Université de Lyon, CNRS UMR 5239, Ecole Normale Supérieure de Lyon, Université Claude Bernard Lyon1, INSERM U1210, Lyon, France
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Abstract
Morphological integration and modularity are important for understanding phenotypic evolution because they constrain variation subjected to selection and enable independent evolution of functional and developmental units. We report dental integration and modularity in representative otariid (Eumetopias jubatus, Callorhinus ursinus) and phocid (Phoca largha, Histriophoca fasciata) species of Pinnipedia. This is the first study of integration and modularity in a secondarily simplified dentition with simple occlusion. Integration was stronger in both otariid species than in either phocid species and related positively to dental occlusion and negatively to both modularity and tooth-size variability across all the species. The canines and third upper incisor were most strongly integrated, comprising a module that likely serves as occlusal guides for the postcanines. There was no or weak modularity among tooth classes. The reported integration is stronger than or similar to that in mammals with complex dentition and refined occlusion. We hypothesise that this strong integration is driven by dental occlusion, and that it is enabled by reduction of modularity that constrains overall integration in complex dentitions. We propose that modularity was reduced in pinnipeds during the transition to aquatic life in association with the origin of pierce-feeding and loss of mastication caused by underwater feeding.
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Billet G, Bardin J. Serial Homology and Correlated Characters in Morphological Phylogenetics: Modeling the Evolution of Dental Crests in Placentals. Syst Biol 2018; 68:267-280. [DOI: 10.1093/sysbio/syy071] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Accepted: 10/22/2018] [Indexed: 01/24/2023] Open
Affiliation(s)
- Guillaume Billet
- CR2P, UMR 7207, Muséum national d’Histoire naturelle, CNRS, Sorbonne Université, 8 rue Buffon 75005 Paris, France
| | - Jérémie Bardin
- CR2P, UMR 7207, Sorbonne Université, MNHN, CNRS, T.46-56, E.5, case 104, 4 place Jussieu, 75252 Paris cedex 05, France
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Renaud S, Ledevin R, Souquet L, Gomes Rodrigues H, Ginot S, Agret S, Claude J, Herrel A, Hautier L. Evolving Teeth Within a Stable Masticatory Apparatus in Orkney Mice. Evol Biol 2018. [DOI: 10.1007/s11692-018-9459-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Ledevin R, Chevret P, Ganem G, Britton-Davidian J, Hardouin EA, Chapuis JL, Pisanu B, da Luz Mathias M, Schlager S, Auffray JC, Renaud S. Phylogeny and adaptation shape the teeth of insular mice. Proc Biol Sci 2017; 283:rspb.2015.2820. [PMID: 26842576 DOI: 10.1098/rspb.2015.2820] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
By accompanying human travels since prehistorical times, the house mouse dispersed widely throughout the world, and colonized many islands. The origin of the travellers determined the phylogenetic source of the insular mice, which encountered diverse ecological and environmental conditions on the various islands. Insular mice are thus an exceptional model to disentangle the relative role of phylogeny, ecology and climate in evolution. Molar shape is known to vary according to phylogeny and to respond to adaptation. Using for the first time a three-dimensional geometric morphometric approach, compared with a classical two-dimensional quantification, the relative effects of size variation, phylogeny, climate and ecology were investigated on molar shape diversity across a variety of islands. Phylogeny emerged as the factor of prime importance in shaping the molar. Changes in competition level, mostly driven by the presence or absence of the wood mouse on the different islands, appeared as the second most important effect. Climate and size differences accounted for slight shape variation. This evidences a balanced role of random differentiation related to history of colonization, and of adaptation possibly related to resource exploitation.
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Affiliation(s)
- Ronan Ledevin
- Laboratoire de Biométrie et Biologie Evolutive, UMR 5558, CNRS, Université Lyon 1, Campus de la Doua, Villeurbanne 69622, France
| | - Pascale Chevret
- Laboratoire de Biométrie et Biologie Evolutive, UMR 5558, CNRS, Université Lyon 1, Campus de la Doua, Villeurbanne 69622, France
| | - Guila Ganem
- Institut des Sciences de l'Evolution de Montpellier, UMR 5554, Université Montpellier, CNRS, IRD, EPHE, Montpellier 34095, France
| | - Janice Britton-Davidian
- Institut des Sciences de l'Evolution de Montpellier, UMR 5554, Université Montpellier, CNRS, IRD, EPHE, Montpellier 34095, France
| | - Emilie A Hardouin
- Faculty of Sciences and Technology, Bournemouth University, Christchurch House, Talbot Campus, Poole, Dorset BH12 5BB, UK
| | - Jean-Louis Chapuis
- Centre d'Ecologie et des Sciences de la Conservation, UMR 7204, Muséum National d'Histoire, Naturelle, 61 rue Buffon, Paris 75005, France
| | - Benoit Pisanu
- Centre d'Ecologie et des Sciences de la Conservation, UMR 7204, Muséum National d'Histoire, Naturelle, 61 rue Buffon, Paris 75005, France
| | - Maria da Luz Mathias
- Centro de Estudos do Ambiente e Mar and Departamento de Biologia Animal, Faculdade de Ciências da Universidade de Lisboa, Campo Grande, Lisboa 1749-016, Portugal
| | - Stefan Schlager
- Anthropologie, Medizinische Fakultät der Albert Ludwigs, Universität Freiburg, Freiburg 79104, Germany
| | - Jean-Christophe Auffray
- Institut des Sciences de l'Evolution de Montpellier, UMR 5554, Université Montpellier, CNRS, IRD, EPHE, Montpellier 34095, France
| | - Sabrina Renaud
- Laboratoire de Biométrie et Biologie Evolutive, UMR 5558, CNRS, Université Lyon 1, Campus de la Doua, Villeurbanne 69622, France
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Variations in Microtus arvalis and Microtus agrestis (Arvicolinae, Rodentia) Dental Morphologies in an Archaeological Context: the Case of Teixoneres Cave (Late Pleistocene, North-Eastern Iberia). J MAMM EVOL 2016. [DOI: 10.1007/s10914-016-9355-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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11
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Evin A, Flink LG, Bălăşescu A, Popovici D, Andreescu R, Bailey D, Mirea P, Lazăr C, Boroneanţ A, Bonsall C, Vidarsdottir US, Brehard S, Tresset A, Cucchi T, Larson G, Dobney K. Unravelling the complexity of domestication: a case study using morphometrics and ancient DNA analyses of archaeological pigs from Romania. Philos Trans R Soc Lond B Biol Sci 2015; 370:20130616. [PMID: 25487340 PMCID: PMC4275896 DOI: 10.1098/rstb.2013.0616] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Current evidence suggests that pigs were first domesticated in Eastern Anatolia during the ninth millennium cal BC before dispersing into Europe with Early Neolithic farmers from the beginning of the seventh millennium. Recent ancient DNA (aDNA) research also indicates the incorporation of European wild boar into domestic stock during the Neolithization process. In order to establish the timing of the arrival of domestic pigs into Europe, and to test hypotheses regarding the role European wild boar played in the domestication process, we combined a geometric morphometric analysis (allowing us to combine tooth size and shape) of 449 Romanian ancient teeth with aDNA analysis. Our results firstly substantiate claims that the first domestic pigs in Romania possessed the same mtDNA signatures found in Neolithic pigs in west and central Anatolia. Second, we identified a significant proportion of individuals with large molars whose tooth shape matched that of archaeological (likely) domestic pigs. These large ‘domestic shape’ specimens were present from the outset of the Romanian Neolithic (6100–5500 cal BC) through to later prehistory, suggesting a long history of admixture between introduced domestic pigs and local wild boar. Finally, we confirmed a turnover in mitochondrial lineages found in domestic pigs, possibly coincident with human migration into Anatolia and the Levant that occurred in later prehistory.
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Affiliation(s)
- Allowen Evin
- Department of Archaeology, University of Aberdeen, St Mary's Building, Elphinstone Road, Aberdeen AB24 3FX, UK CNRS-Muséum National d'Histoire Naturelle, UMR 7209, Archéozoologie, archéobotanique, 55 rue Buffon, 75005 Paris, France
| | - Linus Girdland Flink
- Department of Archaeology, University of Aberdeen, St Mary's Building, Elphinstone Road, Aberdeen AB24 3FX, UK Durham Evolution and Ancient DNA, Department of Archaeology, University of Durham, South Road, Durham DH1 3LE, UK
| | - Adrian Bălăşescu
- National History Museum of Romania, Calea Victoriei no. 12, District 3, 030026 Bucharest, Romania
| | - Dragomir Popovici
- National History Museum of Romania, Calea Victoriei no. 12, District 3, 030026 Bucharest, Romania
| | - Radian Andreescu
- National History Museum of Romania, Calea Victoriei no. 12, District 3, 030026 Bucharest, Romania
| | - Douglas Bailey
- Department of Anthropology, College of Liberal and Creative Arts, San Francisco State University, 1600 Holloway Avenue, Science 377, San Francisco, CA 94132, USA
| | - Pavel Mirea
- Teleorman County Museum, str. 1848, no. 1, 140033 Alexandria, Romania
| | - Cătălin Lazăr
- National History Museum of Romania, Calea Victoriei no. 12, District 3, 030026 Bucharest, Romania
| | - Adina Boroneanţ
- Institute of Archaeology 'Vasile Pârvan' of the Romanian Academy, 11 Henri Coandă St., Bucharest, Romania
| | - Clive Bonsall
- School of History, Classics and Archaeology, University of Edinburgh, William Robertson Wing, Old Medical School, Teviot Place, Edinburgh EH8 9AG, UK
| | | | - Stéphanie Brehard
- CNRS-Muséum National d'Histoire Naturelle, UMR 7209, Archéozoologie, archéobotanique, 55 rue Buffon, 75005 Paris, France
| | - Anne Tresset
- CNRS-Muséum National d'Histoire Naturelle, UMR 7209, Archéozoologie, archéobotanique, 55 rue Buffon, 75005 Paris, France
| | - Thomas Cucchi
- Department of Archaeology, University of Aberdeen, St Mary's Building, Elphinstone Road, Aberdeen AB24 3FX, UK CNRS-Muséum National d'Histoire Naturelle, UMR 7209, Archéozoologie, archéobotanique, 55 rue Buffon, 75005 Paris, France
| | - Greger Larson
- Durham Evolution and Ancient DNA, Department of Archaeology, University of Durham, South Road, Durham DH1 3LE, UK
| | - Keith Dobney
- Department of Archaeology, University of Aberdeen, St Mary's Building, Elphinstone Road, Aberdeen AB24 3FX, UK
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Evin A, Dobney K, Schafberg R, Owen J, Vidarsdottir US, Larson G, Cucchi T. Phenotype and animal domestication: A study of dental variation between domestic, wild, captive, hybrid and insular Sus scrofa. BMC Evol Biol 2015; 15:6. [PMID: 25648385 PMCID: PMC4328033 DOI: 10.1186/s12862-014-0269-x] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Accepted: 12/11/2014] [Indexed: 11/24/2022] Open
Abstract
Background Identifying the phenotypic responses to domestication remains a long-standing and important question for researchers studying its early history. The great diversity in domestic animals and plants that exists today bears testament to the profound changes that domestication has induced in their ancestral wild forms over the last millennia. Domestication is a complex evolutionary process in which wild organisms are moved to new anthropogenic environments. Although modern genetics are significantly improving our understanding of domestication and breed formation, little is still known about the associated morphological changes linked to the process itself. In order to explore phenotypic variation induced by different levels of human control, we analysed the diversity of dental size, shape and allometry in modern free-living and captive wild, wild x domestic hybrid, domestic and insular Sus scrofa populations. Results We show that domestication has created completely new dental phenotypes not found in wild boar (although the amount of variation amongst domestic pigs does not exceed that found in the wild). Wild boar tooth shape also appears to be biogeographically structured, likely the result of post-glacial recolonisation history. Furthermore, distinct dental phenotypes were also observed among domestic breeds, probably the result of differing types and intensity of past and present husbandry practices. Captivity also appears to impact tooth shape. Wild x domestic hybrids possess second molars that are strictly intermediate in shape between wild boar and domestic pigs (third molars, however, showing greater shape similarity with wild boar) while their size is more similar to domestic pigs. The dental phenotypes of insular Sus scrofa populations found on Corsica and Sardinia today (originally introduced by Neolithic settlers to the islands) can be explained either by feralization of the original introduced domestic swine or that the founding population maintained a wild boar phenotype through time. Conclusions Domestication has driven significant phenotypic diversification in Sus scrofa. Captivity (environmental control), hybridization (genome admixture), and introduction to islands all correspond to differing levels of human control and may be considered different stages of the domestication process. The relatively well-known genetic evolutionary history of pigs shows a similar complexity at the phenotypic level. Electronic supplementary material The online version of this article (doi:10.1186/s12862-014-0269-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Allowen Evin
- Department of Archaeology, University of Aberdeen, St. Mary's Building, Elphinstone Road, Aberdeen, UK. .,CNRS-Muséum National d'Histoire Naturelle, UMR 7209, Archéozoologie, Archéobotanique : Sociétés, Pratiques et Environnement, 55 rue Buffon, 75005, Paris, France.
| | - Keith Dobney
- Department of Archaeology, University of Aberdeen, St. Mary's Building, Elphinstone Road, Aberdeen, UK.
| | - Renate Schafberg
- Group Animal Breeding, Institute of Agricultural and Nutritional Sciences (IANS), Martin-Luther-University Halle-Wittenberg, Theodor-Lieser-Str, 11 D-06120, Halle/Saale, Germany.
| | - Joseph Owen
- Department of Archaeology, University of Aberdeen, St. Mary's Building, Elphinstone Road, Aberdeen, UK. .,Department of Archaeology, Simon Fraser University, Education Bulding 9635, 8888 University Dr, Burnaby, BC, V5A, Canada. .,Department of Anthropology, Durham University, South Road, Durham, DH1 3LE, UK.
| | | | - Greger Larson
- Durham Evolution and Ancient DNA, Department of Archaeology, Durham University, South Road, Durham, DH1 3LE, UK.
| | - Thomas Cucchi
- Department of Archaeology, University of Aberdeen, St. Mary's Building, Elphinstone Road, Aberdeen, UK. .,CNRS-Muséum National d'Histoire Naturelle, UMR 7209, Archéozoologie, Archéobotanique : Sociétés, Pratiques et Environnement, 55 rue Buffon, 75005, Paris, France.
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Labonne G, Navarro N, Laffont R, Chateau-Smith C, Montuire S. Developmental integration in a functional unit: deciphering processes from adult dental morphology. Evol Dev 2014; 16:224-32. [DOI: 10.1111/ede.12085] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Gaëlle Labonne
- Laboratoire PALEVO; Ecole Pratique des Hautes Etudes; 6 bd Gabriel Dijon France
- UMR uB/CNRS 6282-Biogéosciences; Université de Bourgogne; 6 bd Gabriel Dijon France
| | - Nicolas Navarro
- Laboratoire PALEVO; Ecole Pratique des Hautes Etudes; 6 bd Gabriel Dijon France
- UMR uB/CNRS 6282-Biogéosciences; Université de Bourgogne; 6 bd Gabriel Dijon France
| | - Rémi Laffont
- UMR uB/CNRS 6282-Biogéosciences; Université de Bourgogne; 6 bd Gabriel Dijon France
| | | | - Sophie Montuire
- Laboratoire PALEVO; Ecole Pratique des Hautes Etudes; 6 bd Gabriel Dijon France
- UMR uB/CNRS 6282-Biogéosciences; Université de Bourgogne; 6 bd Gabriel Dijon France
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14
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Polychronis G, Christou P, Mavragani M, Halazonetis DJ. Geometric morphometric 3D shape analysis and covariation of human mandibular and maxillary first molars. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2013; 152:186-96. [PMID: 24009105 DOI: 10.1002/ajpa.22340] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2012] [Revised: 06/20/2013] [Accepted: 06/20/2013] [Indexed: 12/31/2022]
Abstract
Dental casts of 160 Greek subjects (80 males, 80 females) were scanned by a structured-light scanner. The upper and lower right first molar occlusal surface 3D meshes were processed using geometric morphometric methods. A total of 265 and 274 curve and surface sliding semilandmarks were placed on the upper and lower molar surfaces, respectively. Principal component analysis and partial least square analysis were performed to assess shape parameters. Molars tended to vary between an elongated and a more square form. The first two principal components (PCs), comprising almost 1/3 of molar shape variation, were related to mesiodistal-buccolingual ratios and relative cusp position. Distal cusps displayed the greatest shape variability. Molars of males were larger than those of females (2.8 and 3.2% for upper and lower molars respectively), but no shape dimorphism was observed. Upper and lower molar sizes were significantly correlated (r(2) = 0.689). Allometry was observed for both teeth. Larger lower molars were associated with shorter cusps, expansion of the distal cusp, and constriction of the mesial cusps (predicted variance 3.25%). Upper molars displayed weaker allometry (predicted variance 1.59%). Upper and lower molar shape covariation proved significant (RV = 17.26%, P < 0.0001). The main parameter of molar covariation in partial least square axis 1, contributing to 30% of total covariation, was cusp height, in contrast to the primary variability traits exhibited by PC1 and PC2. The aim of this study was to evaluate shape variation and covariation, including allometry and sexual dimorphism, of maxillary and mandibular first permanent molar occlusal surfaces.
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Affiliation(s)
- Georgios Polychronis
- Department of Orthodontics, School of Dentistry, National and Kapodistrian University of Athens, Athens, 11527, Greece
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Fulwood EL, Kramer A. Brief communication: Effect of size biases in the coefficient of variation on assessing intraspecific variability in the prosimian skeleton. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2013; 152:151-5. [PMID: 23900852 DOI: 10.1002/ajpa.22334] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Accepted: 06/11/2013] [Indexed: 11/10/2022]
Abstract
This study examines the effect of a measurement size bias in coefficients of variation on the evaluation of intraspecific skeletal variability in a sample of eight prosimian species (Eulemur fulvus, Hapalemur griseus, Lemur catta, Varecia variegata, Galago senegalensis, Otolemur crassicaudatus, Nycticebus coucang, and Tarsius syrichta). Measurements with smaller means were expected to have higher coefficients of variation (CVs) due to the impact of instrumental precision on the ability to assess variability. This was evaluated by testing for a negative correlation between CVs and means in the total sample, within each species, and within each measurement, and by testing for the leveraging impact of small measurements on the significance of comparisons of variability between regions of the prosimian skeleton. Three comparisons were made: cranial versus postcranial variability, epiphysis versus diaphysis variability, and forelimb versus hindlimb variability. CVs were significantly negatively correlated with means within the total sample (r(2) = 0.208, P < 0.0001) and within each species. CVs and means were significantly correlated within only three of the measurements, which may reflect the relatively low body size range of the species studied. As predicted by the higher variability of smaller measurements, removing the smallest measurements from comparisons of variable classes containing measurements of different mean magnitudes pushed the comparisons below significance. These results indicate caution should be exercised when using CVs to assess variability across sets of measurements with different means.
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Affiliation(s)
- Ethan L Fulwood
- Department of Anthropology, University of Tennessee, Knoxville, TN, 37996-0720
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Gómez-Robles A, Polly PD. MORPHOLOGICAL INTEGRATION IN THE HOMININ DENTITION: EVOLUTIONARY, DEVELOPMENTAL, AND FUNCTIONAL FACTORS. Evolution 2012; 66:1024-43. [DOI: 10.1111/j.1558-5646.2011.01508.x] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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A geometric morphometric analysis of hominin upper premolars. Shape variation and morphological integration. J Hum Evol 2011; 61:688-702. [DOI: 10.1016/j.jhevol.2011.09.004] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2010] [Revised: 09/06/2011] [Accepted: 09/13/2011] [Indexed: 01/14/2023]
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Renaud S, Pantalacci S, Auffray JC. Differential evolvability along lines of least resistance of upper and lower molars in island house mice. PLoS One 2011; 6:e18951. [PMID: 21589657 PMCID: PMC3092747 DOI: 10.1371/journal.pone.0018951] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2010] [Accepted: 03/15/2011] [Indexed: 11/30/2022] Open
Abstract
Variation within a population is a key feature in evolution, because it can increase or impede response to selection, depending on whether or not the intrapopulational variance is correlated to the change under selection. Hence, main directions of genetic variance have been proposed to constitute “lines of least resistance to evolution” along which evolution would be facilitated. Yet, the screening of selection occurs at the phenotypic level, and the phenotypic variance is not only the product of the underlying genetic variance, but also of developmental processes. It is thus a key issue for interpreting short and long term evolutionary patterns to identify whether main directions of phenotypic variance indeed constitute direction of facilitated evolution, and whether this is favored by developmental processes preferably generating certain phenotypes. We tackled these questions by a morphometric quantification of the directions of variance, compared to the direction of evolution of the first upper and lower molars of wild continental and insular house mice. The main phenotypic variance indeed appeared as channeling evolution between populations. The upper molar emerged as highly evolvable, because a strong allometric component contributed to its variance. This allometric relationship drove a repeated but independent evolution of a peculiar upper molar shape whenever size increased. This repeated evolution, together with knowledge about the molar development, suggest that the main direction of phenotypic variance correspond here to a “line of least developmental resistance” along which evolution between population is channeled.
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Affiliation(s)
- Sabrina Renaud
- Laboratoire de Biométrie et Biologie Evolutive, Université Lyon 1, CNRS, Villeurbanne, France.
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Ledevin R, Quéré JP, Renaud S. Morphometrics as an insight into processes beyond tooth shape variation in a bank vole population. PLoS One 2010; 5:e15470. [PMID: 21085584 PMCID: PMC2981563 DOI: 10.1371/journal.pone.0015470] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2010] [Accepted: 09/28/2010] [Indexed: 11/24/2022] Open
Abstract
Phenotype variation is a key feature in evolution, being produced by development and the target of the screening by selection. We focus here on a variable morphological feature: the third upper molar (UM3) of the bank vole, aiming at identifying the sources of this variation. Size and shape of the UM3 occlusal surface was quantified in successive samples of a bank vole population. The first source of variation was the season of trapping, due to differences in the age structure of the population in turn affecting the wear of the teeth. The second direction of variation corresponded to the occurrence, or not, of an additional triangle on the tooth. This intra-specific variation was attributed to the space available at the posterior end of the UM3, allowing or not the addition of a further triangle.This size variation triggering the shape polymorphism is not controlled by the developmental cascade along the molar row. This suggests that other sources of size variation, possibly epigenetic, might be involved. They would trigger an important shape variation as side-effect by affecting the termination of the sequential addition of triangles on the tooth.
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Affiliation(s)
- Ronan Ledevin
- Paléoenvironnements et Paléobiosphère, UMR 5125 CNRS, Université Lyon 1, Villeurbanne, France.
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