Search

Your search keyword '"Pierre-Loup Jan"' showing total 7 results
Start Over Author "Pierre-Loup Jan" Publisher hal ccsd
7 results on '"Pierre-Loup Jan"'

1. Genetic diversity in a long‐lived mammal is explained by the past’s demographic shadow and current connectivity

Author

Pierrette Nyssen, Sébastien J. Puechmaille, Damien Fourcy, Lisa Lehnen, Martin Biedermann, Wigbert Schorcht, Eric J. Petit, Gerald Kerth, Pierre-Loup Jan, Anne-Laure Besnard, Universität Greifswald - University of Greifswald, Écologie et santé des écosystèmes (ESE), AGROCAMPUS OUEST, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Interessengemeinschaft für Fledermausschutz und -forschung in Thüringen (IFT) e.V, Natagora (Association), Partenaires INRAE, Nachtaktiv Biologists Bat Res GbR, Erfurt, Institut des Sciences de l'Evolution de Montpellier (UMR ISEM), École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre National de la Recherche Scientifique (CNRS)-Institut de recherche pour le développement [IRD] : UR226, Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Institut de recherche pour le développement [IRD] : UR226-Centre National de la Recherche Scientifique (CNRS), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-INSTITUT AGRO Agrocampus Ouest, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), and Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École Pratique des Hautes Études (EPHE)

Subjects
0106 biological sciences, bottleneck, Conservation of Natural Resources, Range (biology), Context (language use), Biology, 010603 evolutionary biology, 01 natural sciences, Bottleneck, 03 medical and health sciences, Genetics, Animals, Ecology, Evolution, Behavior and Systematics, Ecosystem, 030304 developmental biology, Isolation by distance, Mammals, Population Density, isolation-by-distance, 0303 health sciences, Genetic diversity, [SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE], Ecology, Population size, [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE], conservation, Genetic Variation, Global change, genetic diversity, 15. Life on land, respiratory system, Genetics, Population, 13. Climate action, connectivity, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Scale (map), human activities, Microsatellite Repeats
Abstract

International audience; Within-species genetic diversity is crucial for the persistence and integrity of populations and ecosystems. Conservation actions require an understanding of factors influencing genetic diversity, especially in the context of global change. Both population size and connectivity are factors greatly influencing genetic diversity; the relative importance of these factors can, however, change through time. Hence, quantifying the degree to which population size or genetic connectivity are shaping genetic diversity, and at which ecological time scale (past or present), is challenging, yet essential for the development of efficient conservation strategies. In this study, we estimated the genetic diversity of 42 colonies of Rhinolophus hipposideros, a long-lived mammal vulnerable to global change, sampling locations spanning its continental northern range. Here, we present an integrative approach that disentangles and quantifies the contribution of different connectivity measures in addition to contemporary colony size and historic bottlenecks in shaping genetic diversity. In our study, the best model explained 64% of the variation in genetic diversity. It included historic bottlenecks, contemporary colony size, connectivity and a negative interaction between the latter two. Contemporary connectivity explained most genetic diversity when considering a 65 km radius around the focal colonies, emphasizing the large geographic scale at which the positive impact of connectivity on genetic diversity is most profound and hence, the minimum scale at which conservation should be planned. Our results highlight that the relative importance of the two main factors shaping genetic diversity varies through time, emphasizing the relevance of disentangling them to ensure appropriate conservation strategies.

Published
2021
Full Text
View/download PDF

2. Exploring the causes of small effective population sizes in cyst nematodes using artificial Globodera pallida populations

Author

Josselin Montarry, Sylvain Fournet, Pierre-Loup Jan, Eric J. Petit, Eric Grenier, Romain Mabon, Sylvie Bardou-Valette, Institut de Génétique, Environnement et Protection des Plantes (IGEPP), Institut National de la Recherche Agronomique (INRA)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-AGROCAMPUS OUEST, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Unité Mixte de Recherche sur les Herbivores - UMR 1213 (UMRH), Institut National de la Recherche Agronomique (INRA)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, Écologie et santé des écosystèmes (ESE), Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST, Institut National de la Recherche Agronomique (INRA)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS), and Institut National de la Recherche Agronomique (INRA)-Université de Rennes (UR)-AGROCAMPUS OUEST

Subjects
0106 biological sciences, Evolution, nematode, [SDV]Life Sciences [q-bio], Population, Zoology, selection, Potato cyst nematode, 010603 evolutionary biology, 01 natural sciences, General Biochemistry, Genetics and Molecular Biology, [SHS]Humanities and Social Sciences, 03 medical and health sciences, Effective population size, Genetic drift, medicine, Animals, [SDV.BV]Life Sciences [q-bio]/Vegetal Biology, Cyst, [INFO]Computer Science [cs], Tylenchoidea, Globodera pallida, education, Selection (genetic algorithm), Plant Diseases, Solanum tuberosum, 030304 developmental biology, General Environmental Science, Population Density, 0303 health sciences, education.field_of_study, General Immunology and Microbiology, biology, General Medicine, biology.organism_classification, medicine.disease, plant resistance, Nematode, [SDE]Environmental Sciences, genetic drift, General Agricultural and Biological Sciences, effective population size
Abstract

The effective size of a population is the size of an ideal population which would undergo genetic drift at the same rate as the real population. The balance between selection and genetic drift depends on the effective population size (Ne), rather than the real numbers of individuals in the population (N). The objectives of the present study were to estimateNein the potato cyst nematodeGlobodera pallidaand to explore the causes of a lowNe/Nratio in cyst nematodes using artificial populations. Using a temporal analysis of 24 independent populations, the medianNewas 58 individuals (minNe= 25 and maxNe= 228).Neis commonly lower thanNbut in the case of cyst nematodes, theNe/Nratio was extremely low. Using artificial populations showed that this low ratio did not result from migration, selection and overlapping generations, but could be explain by the fact thatG. pallidapopulations deviate in structure from the assumptions of the ideal population by having unequal sex ratios, high levels of inbreeding and a high variance in family sizes. The consequences of a lowNe, resulting in a strong intensity of genetic drift, could be important for their control becauseG. pallidapopulations will have a low capacity to adapt to changing environments.

Published
2019
Full Text
View/download PDF

3. Range expansion is associated with increased survival and fecundity in a long-lived bat species

Author

Anne-Laure Besnard, Wigbert Schorcht, Eric J. Petit, Gerald Kerth, Pierre-Loup Jan, Martin Biedermann, Lisa Lehnen, Sébastien J. Puechmaille, P. Le Gouar, Écologie et santé des écosystèmes (ESE), Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST, Ernst-Moritz-Arndt-Universität Greifswald, Ecosystèmes, biodiversité, évolution [Rennes] (ECOBIO), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR)-Centre National de la Recherche Scientifique (CNRS), École pratique des hautes études (EPHE), Office National des Forets (ONF), PROCOPE/DAAD programme [57211773], PROCOPE/PHC programme [35454SB], DFG (RESPONSE exchange grant), Deutsche Forschungsgemeinschaft, German Science Foundation DFG, Interessengemeinschaft Fledermausschutz & Forsch, Bad Liebenstein, Nachtaktiv Biologists Bat Res GbR, Erfurt, Université de Rennes (UR)-Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR), Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS), École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR)-Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes 1 (UR1), and Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)

Subjects
0106 biological sciences, life history, capture-mark-recapture, Range (biology), media_common.quotation_subject, Rhinolophus hipposideros, Population, Longevity, Population Dynamics, Zoology, Trade-off, 010603 evolutionary biology, 01 natural sciences, General Biochemistry, Genetics and Molecular Biology, 03 medical and health sciences, Feces, Chiroptera, Germany, Population growth, Animals, education, Population Growth, range expansion, 030304 developmental biology, General Environmental Science, media_common, trade-off, 0303 health sciences, education.field_of_study, General Immunology and Microbiology, biology, Ecology, Reproduction, General Medicine, DNA, 15. Life on land, Fecundity, biology.organism_classification, Fertility, Habitat, Female, France, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, General Agricultural and Biological Sciences, Animal Distribution
Abstract

The speed and dynamics of range expansions shape species distributions and community composition. Despite the critical impact of population growth rates for range expansion, they are neglected in existing empirical studies, which focus on the investigation of selected life-history traits. Here, we present an approach based on non-invasive genetic capture–mark–recapture data for the estimation of adult survival, fecundity and juvenile survival, which determine population growth. We demonstrate the reliability of our method with simulated data, and use it to investigate life-history changes associated with range expansion in 35 colonies of the bat species Rhinolophus hipposideros . Comparing the demographic parameters inferred for 19 of those colonies which belong to an expanding population with those inferred for the remaining 16 colonies from a non-expanding population reveals that range expansion is associated with higher net reproduction. Juvenile survival was the main driver of the observed reproduction increase in this long-lived bat species with low per capita annual reproductive output. The higher average growth rate in the expanding population was not associated with a trade-off between increased reproduction and survival, suggesting that the observed increase in reproduction stems from a higher resource acquisition in the expanding population. Environmental conditions in the novel habitat hence seem to have an important influence on range expansion dynamics, and warrant further investigation for the management of range expansion in both native and invasive species.

Published
2019
Full Text
View/download PDF

4. Temporal sampling helps unravel the genetic structure of naturally occurring populations of a phytoparasitic nematode. 1. Insights from the estimation of effective population sizes

Author

Sylvain Fournet, Cécile Gracianne, Eric J. Petit, Catherine Porte, Eric Olivier, Jean-François Arnaud, Pierre-Loup Jan, Marie‐Christine Denis, Sylvie Bardou-Valette, Écologie et santé des écosystèmes (ESE), Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST, Institut de Génétique, Environnement et Protection des Plantes (IGEPP), AGROCAMPUS OUEST-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National de la Recherche Agronomique (INRA), Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 (Evo-Eco-Paléo), Université de Lille-Centre National de la Recherche Scientifique (CNRS), French Ministry of Agriculture, French Ministry of Education and Research, Institut Technique de la Betterave sucrière, Union Française des Semenciers, Institut National de la Recherche Agronomique (INRA)-Université de Rennes (UR)-AGROCAMPUS OUEST, Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 (Evo-Eco-Paléo (EEP)), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Institut National de la Recherche Agronomique (INRA)-Université de Rennes 1 (UR1), and Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-AGROCAMPUS OUEST

Subjects
0301 basic medicine, wild nematode populations, hetérodéra schachtii, Context (language use), plante hôte, Sea beet, Heterodera schachtii, 03 medical and health sciences, fréquence des allèles, Effective population size, genetique des populations, Genetics, Ecology, Evolution, Behavior and Systematics, nématode à kyste, 2. Zero hunger, Natural selection, [SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE], biology, amaranthaceae, résistance aux parasites, Ecology, Population size, espèce végétale, fungi, food and beverages, Original Articles, 15. Life on land, biology.organism_classification, Beta vulgaris subsp. maritima, lutte contre les ravageurs, beta vulgaris spp. maritima, effective population size, heterodera schachtii, temporal sampling, betterave, 030104 developmental biology, Beta vulgaris spp. maritima, Genetic structure, plante, Original Article, General Agricultural and Biological Sciences, Inbreeding, mortalité
Abstract

International audience; The sustainability of modern agriculture relies on strategies that can control the ability of pathogens to overcome chemicals or genetic resistances through natural selection. This evolutionary potential, which depends partly on effective population size (Ne), is greatly influenced by human activities. In this context, wild pathogen populations can provide valuable information for assessing the long-term risk associated with crop pests. In this study, we estimated the effective population size of the beet cyst nematode, Heterodera schachtii, by sampling 34 populations infecting the sea beet Beta vulgaris spp. maritima twice within a one-year period. Only 20 populations produced enough generations to analyze the variation in allele frequencies, with the remaining populations showing a high mortality rate of the host plant after only one year. The 20 analyzed populations showed surprisingly low effective population sizes, with most having Ne close to 85 individuals. We attribute these low values to the variation in population size through time, systematic inbreeding, and unbalanced sex- ratios. Our results suggest that H. schachtii has low evolutionary potential in natural environments. Pest control strategies in which populations on crops mimic wild populations may help prevent parasite adaptation to host resistance.

Published
2016
Full Text
View/download PDF

5. Temporal sampling helps unravel the genetic structure of naturally occurring populations of a phytoparasitic nematode. 2. Separating the relative effects of gene flow and genetic drift

Author

Sylvain Fournet, Eric Olivier, Catherine Porte, Eric J. Petit, Cécile Gracianne, Sylvie Bardou-Valette, Marie‐Christine Denis, Jean-François Arnaud, Pierre-Loup Jan, VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS), Institut de Génétique, Environnement et Protection des Plantes (IGEPP), AGROCAMPUS OUEST-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National de la Recherche Agronomique (INRA), Écologie et santé des écosystèmes (ESE), Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST, Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 (Evo-Eco-Paléo), Université de Lille-Centre National de la Recherche Scientifique (CNRS), Ministère de l'Education Nationale, de l'Enseignement Superieur et de la Recherche, Delphine Eoche-Bosy and Didier Fouville (UMR IGEPP), French Ministry of Agriculture, Institut Technique de la Betterave sucrière, Union Française des Semenciers, Institut National de la Recherche Agronomique (INRA)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-AGROCAMPUS OUEST, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Institut National de la Recherche Agronomique (INRA)-Université de Rennes (UR)-AGROCAMPUS OUEST, Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 (Evo-Eco-Paléo (EEP)), VetAgro Sup ( VAS ), Institut de Génétique, Environnement et Protection des Plantes ( IGEPP ), Institut National de la Recherche Agronomique ( INRA ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -AGROCAMPUS OUEST, Écologie et santé des écosystèmes ( ESE ), Institut National de la Recherche Agronomique ( INRA ) -AGROCAMPUS OUEST, Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 ( Evo-Eco-Paléo ), and Université de Lille-Centre National de la Recherche Scientifique ( CNRS )

Subjects
0301 basic medicine, wild nematode populations, Population, marqueur génétique, assignment tests, hetérodéra schachtii, Biology, plante hôte, Sea beet, Gene flow, Heterodera schachtii, 03 medical and health sciences, Genetic drift, genetique des populations, Genetics, education, Ecology, Evolution, Behavior and Systematics, heterodera schachtii, gene flow, migration-drift equilibrium, nématode à kyste, 2. Zero hunger, education.field_of_study, [SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE], amaranthaceae, Ecology, espèce végétale, fungi, food and beverages, Original Articles, 15. Life on land, biology.organism_classification, Beta vulgaris subsp. maritima, culture, lutte contre les ravageurs, [ SDV.GEN.GPO ] Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE], betterave, 030104 developmental biology, Genetic marker, Evolutionary biology, Genetic structure, plante, Biological dispersal, Original Article, General Agricultural and Biological Sciences, migration–drift equilibrium
Abstract

International audience; Studying wild pathogen populations in natural ecosystems offers the opportunity to better understand the evolutionary dynamics of biotic diseases in crops and to enhance pest control strategies. We used simulations and genetic markers to investigate the spatial and temporal population genetic structure of wild populations of the beet cyst nematode Heterodera schachtii on a wild host plant species, the sea beet (Beta vulgaris spp. maritima), the wild ancestor of cultivated beets. Our analysis of the variation of eight microsatellite loci across four study sites showed that (i) wild H. schachtii populations displayed fine-scaled genetic structure with no evidence of substantial levels of gene flow beyond the scale of the host plant, and comparisons with simulations indicated that (ii) genetic drift substantially affected the residual signals of isolation-by-distance processes, leading to departures from migration–drift equilibrium. In contrast to what can be suspected for (crop) field populations, this showed that wild cyst nematodes have very low dispersal capabilities and are strongly disconnected from each other. Our results provide some key elements for designing pest control strategies , such as decreasing passive dispersal events to limit the spread of virulence among field nematode populations.

Published
2016
Full Text
View/download PDF

6. Heterozygote deficits in cyst plant-parasitic nematodes: possible causes and consequences

Author

Sylvain Fournet, Andrew Overall, Eric J. Petit, Sylvie Bardou-Valette, Eric Olivier, Cécile Gracianne, Josselin Montarry, Pierre-Loup Jan, Eric Grenier, Institut de Génétique, Environnement et Protection des Plantes (IGEPP), Institut National de la Recherche Agronomique (INRA)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-AGROCAMPUS OUEST, Écologie et santé des écosystèmes (ESE), Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST, School of Pharmacy and Biomedical Sciences, University of Brighton, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), and Institut National de la Recherche Agronomique (INRA)-Université de Rennes (UR)-AGROCAMPUS OUEST

Subjects
0106 biological sciences, Heterozygote, microsatellite, Genotype, Wahlund effect, nematode, Consanguinity, Biology, 010603 evolutionary biology, 01 natural sciences, 03 medical and health sciences, consanguinity, Gene Frequency, Tobacco, Genetics, Animals, [SDV.BV]Life Sciences [q-bio]/Vegetal Biology, Inbreeding, Tylenchoidea, Globodera pallida, Ecology, Evolution, Behavior and Systematics, Alleles, 030304 developmental biology, Solanum tuberosum, 0303 health sciences, Likelihood Functions, fungi, heterozygote deficit, Genetic Variation, food and beverages, Heterozygote advantage, biology.organism_classification, Null allele, Genetics, Population, null allele, Biological dispersal, Beta vulgaris, Heterodera schachtii, Microsatellite Repeats
Abstract

International audience; Deviations of genotypic frequencies from Hardy-Weinberg equilibrium (HWE) expectations could reveal important aspects of the biology of populations. Deviations from HWE due to heterozygote deficits have been recorded for three plant-parasitic nematode species. However, it has never been determined whether the observed deficits were due (i) to the presence of null alleles, (ii) to a high level of consanguinity and/or (iii) to a Wahlund effect. The aim of the present work was, while taking into the possible confounding effect of null alleles, to disentangle consanguinity and Wahlund effect in natural populations of those three economically important cyst nematodes using microsatellite markers: Globodera pallida, G. tabacum and Heterodera schachtii, pests of potato, tobacco and sugar beet, respectively. The results show a consistent pattern of heterozygote deficiency in the three nematode species sampled at the spatial scale of the host plant. We demonstrate that the prevalence of null alleles is weak and that heterozygote deficits do not have a single origin. Our results suggested that it is restricted dispersal that leads to heterozygote deficits through both consanguinity and substructure, which effects can be linked to soil movement, cyst density, and the number of generations per year. We discuss potential implications for the durability of plant resistances that are used to protect crops against parasites in which mating between relatives occur. While consanguineous mating leads to homozygosity at all loci, including loci governing avirulence/virulence, which favours the expression of virulence when recessive, the Wahlund effect is expected to have no particular effect on the adaptation of nematodes to resistances.

Published
2015
Full Text
View/download PDF

7. Heterozygote deficits in cyst forming plant parasitic nematodes: disentangling consanguinity and Wahlund effect

Author

Josselin Montarry, Pierre-Loup Jan, Cécile Gracianne, Sylvie Bardou-Valette, Sylvain Fournet, Eric Grenier, Eric Petit, Institut de Génétique, Environnement et Protection des Plantes (IGEPP), AGROCAMPUS OUEST-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National de la Recherche Agronomique (INRA), Écologie et santé des écosystèmes (ESE), Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST, Institut National de la Recherche Agronomique (INRA)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-AGROCAMPUS OUEST, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), and Institut National de la Recherche Agronomique (INRA)-Université de Rennes (UR)-AGROCAMPUS OUEST

Subjects
microsatellite, consanguinity, Wahlund effect, nematode, [SDV]Life Sciences [q-bio], heterozygote deficit
Abstract

Session 6: GenomicsSession 6: Genomics; absent

Published
2014

Catalog

Books, media, physical & digital resources
See catalog results