Gene copy number variations as signatures of adaptive evolution in the parthenogenetic, plant‐parasitic nematode Meloidogyne incognita
| Autor: | Mégane Karaulic, Laetitia Perfus-Barbeoch, Loris Pratx, Pierre Abad, Georgios Koutsovoulos, Etienne Danchin, Philippe Castagnone-Sereno, Marc Bailly-Bechet, Martine Da Rocha, Karine Mulet |
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| Přispěvatelé: | Institut Sophia Agrobiotech (ISA), Centre National de la Recherche Scientifique (CNRS)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut National de la Recherche Agronomique (INRA), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA), Plant Health and Environment INRA Division, French Government (National Research Agency, ANR)French National Research Agency (ANR) [392 ANR-13-JSV7-000], European Project: 609398,EC:FP7:PEOPLE,FP7-PEOPLE-2013-COFUND,AGREENSKILLSPLUS(2014), Institut National de la Recherche Agronomique (INRA)-Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0301 basic medicine DNA Copy Number Variations [SDV]Life Sciences [q-bio] Asexual reproduction Plant Roots 010603 evolutionary biology 01 natural sciences Evolution Molecular gene copy number variations 03 medical and health sciences Reproduction Asexual Genetic variation Genetics Meloidogyne incognita Animals Tylenchoidea experimental evolution Copy-number variation parthenogenesis root-knot nematodes Gene Plant Physiological Phenomena Ecology Evolution Behavior and Systematics Plant Diseases Experimental evolution adaptive evolution biology Genomics Plants biology.organism_classification Biological Evolution 030104 developmental biology Nematode 13. Climate action array comparative genomic hybridization [SDE]Environmental Sciences Adaptation |
| Zdroj: | Molecular Ecology Molecular Ecology, Wiley, 2019, 28 (10), pp.2559-2572. ⟨10.1111/mec.15095⟩ Molecular Ecology, 2019, 28 (10), pp.2559-2572. ⟨10.1111/mec.15095⟩ |
| ISSN: | 1365-294X 0962-1083 |
| DOI: | 10.1111/mec.15095 |
| Popis: | International audience; Adaptation to changing environmental conditions represents a challenge to parthenogenetic organisms, and until now, how phenotypic variants are generated in clones in response to the selection pressure of their environment remains poorly known. The obligatory parthenogenetic root-knot nematode species Meloidogyne incognita has a worldwide distribution and is the most devastating plant-parasitic nematode. Despite its asexual reproduction, this species exhibits an unexpected capacity of adaptation to environmental constraints, for example, resistant hosts. Here, we used a genomewide comparative hybridization strategy to evaluate variations in gene copy numbers between genotypes of M. incognita resulting from two parallel experimental evolution assays on a susceptible vs. resistant host plant. We detected gene copy number variations (CNVs) associated with the ability of the nematodes to overcome resistance of the host plant, and this genetic variation may reflect an adaptive response to host resistance in this parthenogenetic species. The CNV distribution throughout the nematode genome is not random and suggests the occurrence of genomic regions more prone to undergo duplications and losses in response to the selection pressure of the host resistance. Furthermore, our analysis revealed an outstanding level of gene loss events in nematode genotypes that have overcome the resistance. Overall, our results support the view that gene loss could be a common class of adaptive genetic mechanism in response to a challenging new biotic environment in clonal animals. |
| Databáze: | OpenAIRE |
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