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Vidal M, Heinze J. Assisted dispersal and reproductive success in an ant species with matchmaking. Ecol Evol 2022; 12:e9236. [PMID: 36016821 PMCID: PMC9398888 DOI: 10.1002/ece3.9236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 07/28/2022] [Accepted: 08/01/2022] [Indexed: 11/27/2022] Open
Abstract
Workers of the ant Cardiocondyla elegans drop female sexuals into the nest entrance of other colonies to promote outbreeding with unrelated, wingless males. Corroborating the results from previous years, we document that carrier and carried female sexuals are typically related and that the transfer initially occurs mostly from their joint natal colonies to unrelated colonies. Female sexuals mate multiply with up to seven genetically distinguishable males. Contrary to our expectation, the colony growth rate of multiple‐mated and outbred female sexuals was lower than that of inbred or single‐mated females, leading to the question of why female sexuals mate multiply at all. Despite the obvious costs, multiple mating might be a way for female sexuals to “pay rent” for hibernation in an alien nest. We argue that in addition to evade inbreeding depression from regular sibling mating over many generations, assisted dispersal might also be a strategy for minimizing the risk of losing all reproductive investment when nests are flooded in winter.
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Affiliation(s)
- Mathilde Vidal
- LS Zoologie/Evolutionsbiologie Universität Regensburg Regensburg Germany
| | - Jürgen Heinze
- LS Zoologie/Evolutionsbiologie Universität Regensburg Regensburg Germany
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2
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Di Pietro V, Ferreira HM, Van Oystaeyen A, Wäckers F, Wenseleers T, Oliveira RC. Distinct Colony Types Caused by Diploid Male Production in the Buff-Tailed Bumblebee Bombus terrestris. Front Ecol Evol 2022. [DOI: 10.3389/fevo.2022.844251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The buff-tailed bumblebee Bombus terrestris presents two distinct colony phenotypes in which some colonies already start producing males very early in the season, while others switch to producing sexuals much later in the season, and specialize mainly in the production of virgin queens. Despite having been extensively investigated in the past, the mechanisms underlying these two distinct phenotypes remain poorly understood. Here we use a combination of behavioral and genetic data to demonstrate that early switchers are in fact diploid male producing colonies, while late switchers produced normal, haploid males. Hence, at a proximate level, early switching to male production was caused by queens mating with males that by chance carried the same sex allele. These patterns were not the result of strong inbreeding within the study population, as the average inbreeding coefficient was very low and in fact slightly negative (−0.11). Moreover, an effect of inbreeding was further excluded because hybrids produced by crossing two distinct outbred populations also produced diploid males in early switching colonies. Finally, we found that diploid males only emerged after a first cohort of workers was produced, while we would have expected diploid males to be produced simultaneously with workers in a 50:50 ratio. We demonstrate that adult diploid males had a distinct cuticular hydrocarbon profile and propose that queens likely cull diploid males during early colony development to reduce the cost of diploid male production.
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Chan KMA, Satterfield T. The maturation of ecosystem services: Social and policy research expands, but whither biophysically informed valuation? PEOPLE AND NATURE 2020. [DOI: 10.1002/pan3.10137] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Affiliation(s)
- Kai M. A. Chan
- Institute of Resources, Environment and Sustainability The University of British Columbia Vancouver BC Canada
| | - Terre Satterfield
- Institute of Resources, Environment and Sustainability The University of British Columbia Vancouver BC Canada
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Glover KA, Harvey AC, Hansen TJ, Fjelldal PG, Besnier FN, Bos JB, Ayllon F, Taggart JB, Solberg MF. Chromosome aberrations in pressure-induced triploid Atlantic salmon. BMC Genet 2020; 21:59. [PMID: 32505176 PMCID: PMC7276064 DOI: 10.1186/s12863-020-00864-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Accepted: 05/28/2020] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Triploid organisms have three sets of chromosomes. In Atlantic salmon, hydrostatic pressure treatment of newly fertilized eggs has been extensively used to produce triploids which are functionally sterile due to their unpaired chromosomes. These fish often perform poorly on commercial farms, sometimes without explanation. Inheritance patterns in individuals subjected to pressure treatment have not been investigated in Atlantic salmon thus far. However, work on other species suggests that this treatment can result in aberrant inheritance. We therefore studied this in Atlantic salmon by genotyping 16 polymorphic microsatellites in eyed eggs and juveniles which had been subjected to pressure-induction of triploidy. Communally reared juveniles including fish subjected to pressure-induction of triploidy and their diploid siblings were included as a control. RESULTS No diploid offspring were detected in any of the eggs or juveniles which were subjected to hydrostatic pressure; therefore, the induction of triploidy was highly successful. Aberrant inheritance was nevertheless observed in 0.9% of the eggs and 0.9% of the juveniles that had been subjected to pressure treatment. In the communally reared fish, 0.3% of the fish subjected to pressure treatment displayed aberrant inheritance, while their diploid controls displayed 0% aberrant inheritance. Inheritance errors included two eyed eggs lacking maternal DNA across all microsatellites, and, examples in both eggs and juveniles of either the maternal or paternal allele lacking in one of the microsatellites. All individuals displaying chromosome aberrations were otherwise triploid. CONCLUSIONS This is the first study to document aberrant inheritance in Atlantic salmon that have been subjected to pressure-induction of triploidy. Our experiments unequivocally demonstrate that even when induction of triploidy is highly successful, this treatment can cause chromosome aberrations in this species. Based upon our novel data, and earlier studies in other organisms, we hypothesize that in batches of Atlantic salmon where low to modest triploid induction rates have been reported, aberrant inheritance is likely to be higher than the rates observed here. Therefore, we tentatively suggest that this could contribute to the unexplained poor performance of triploid salmon that is occasionally reported in commercial aquaculture. These hypotheses require further investigation.
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Affiliation(s)
- K A Glover
- Institute of Marine Research, Bergen, Norway
- Department of Biological Sciences, University of Bergen, Bergen, Norway
| | - A C Harvey
- Institute of Marine Research, Bergen, Norway.
| | - T J Hansen
- Institute of Marine Research, Bergen, Norway
| | | | - F N Besnier
- Institute of Marine Research, Bergen, Norway
| | - J B Bos
- ZEBCARE, Nederweert, The Netherlands
| | - F Ayllon
- Institute of Marine Research, Bergen, Norway
| | | | - M F Solberg
- Institute of Marine Research, Bergen, Norway
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Viable Triploid Honey Bees ( Apis mellifera capensis) Are Reliably Produced in the Progeny of CO 2 Narcotised Queens. G3-GENES GENOMES GENETICS 2018; 8:3357-3366. [PMID: 30139764 PMCID: PMC6169382 DOI: 10.1534/g3.118.200614] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The haplodiploid system of sex determination of Hymenoptera acts as an exaptation for species to evolve novel forms of asexual reproduction including thelytoky (clonal offspring of the mother). During normal reproduction in Hymenoptera, three of the four products of meiosis that are present in newly-laid eggs are lost as polar bodies, while the remaining pronucleus either develops as a haploid male or fuses with a sperm nucleus to produce a diploid zygote. In contrast, in thelytokous reproduction, which is uncommon but taxonomically widespread, two of the four products of meiosis fuse, as if one acted as a sperm. Queenless workers of Apis mellifera capensis, a subspecies of honey bee from South Africa, routinely reproduce thelytokously. Unmated A. m. capensis queens can also be induced to lay thelytokously by narcosis with carbon dioxide, but mated queens are never thelytokous. We artificially inseminated A. m. capensis queens using CO2 narcosis. Up to 1/3 of offspring workers carried two maternal alleles and an allele of one father whereas no three-allele progeny were seen in control queens of the arrhenotokous (unfertilized eggs result in males) subspecies A. m. scutellata. Flow cytometry of three-allele individuals revealed that they were triploid and arose from the fertilization of a thelytokous fusion nucleus. We then reared six queens from a narcotized A. m. capensis queen and determined the ploidy of the offspring queens based on microsatellites. One of the five daughters was triploid. Following artificial insemination, this queen produced unfertilized thelytokous diploid eggs at high frequency, and unfertilized triploid eggs at much lower frequency. If fertilized, thelytokous diploid eggs were non-viable, even though triploidy in itself does not impede normal development. In contrast, when the rarer triploid eggs were fertilized, a proportion developed into viable tetraploids. Our study highlights the extraordinary developmental flexibility of haplo-diploid systems.
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Lecocq T, Gérard M, Maebe K, Brasero N, Dehon L, Smagghe G, Valterová I, De Meulemeester T, Rasmont P, Michez D. Chemical reproductive traits of diploid Bombus terrestris males: Consequences on bumblebee conservation. INSECT SCIENCE 2017; 24:623-630. [PMID: 26953256 DOI: 10.1111/1744-7917.12332] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 01/04/2016] [Accepted: 01/31/2016] [Indexed: 06/05/2023]
Abstract
The current bumblebee decline leads to inbreeding in populations that fosters a loss of allelic diversity and diploid male production. As diploid males are viable and their offspring are sterile, bumblebee populations can quickly fall in a vortex of extinction. In this article, we investigate for the first time a potential premating mechanism through a major chemical reproductive trait (male cephalic labial gland secretions) that could prevent monandrous virgin queens from mating with diploid males. We focus our study on the cephalic labial gland secretions of diploid and haploid males of Bombus terrestris (L.). Contrary to initial expectations, our results do not show any significant differentiation of cephalic labial gland secretions between diploid and haploid specimens. Queens seem therefore to be unable to avoid mating with diploid males based on their compositions of cephalic labial gland secretions. This suggests that the vortex of extinction of diploid males could not be stopped through premating avoidance based on the cephalic labial gland secretions but other mechanisms could avoid mating between diploid males and queens.
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Affiliation(s)
- Thomas Lecocq
- Laboratory of Zoology, Research Institute of Biosciences, University of Mons, Mons, France
- Research Unit Animal and Functionalities of Animal Products (URAFPA), University of Lorraine - INRA, 2 Avenue de la Forêt de Haye, BP 172, F-54505, Vandoeuvre-lès-Nancy, France
| | - Maxence Gérard
- Laboratory of Zoology, Research Institute of Biosciences, University of Mons, Mons, France
| | - Kevin Maebe
- Department of Crop Protection, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000, Ghent, Belgium
| | - Nicolas Brasero
- Laboratory of Zoology, Research Institute of Biosciences, University of Mons, Mons, France
| | - Lauren Dehon
- Laboratory of Zoology, Research Institute of Biosciences, University of Mons, Mons, France
| | - Guy Smagghe
- Department of Crop Protection, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000, Ghent, Belgium
| | - Irena Valterová
- Academy of Sciences of the Czech Republic, Institute of Organic Chemistry and Biochemistry, Flamingovo nam 2, CZ 166 10, Prague, Czech Republic
| | | | - Pierre Rasmont
- Laboratory of Zoology, Research Institute of Biosciences, University of Mons, Mons, France
| | - Denis Michez
- Laboratory of Zoology, Research Institute of Biosciences, University of Mons, Mons, France
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High levels of male diploidy but low levels of genetic structure characterize Bombus vosnesenskii populations across the Western US. CONSERV GENET 2016. [DOI: 10.1007/s10592-016-0900-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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8
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Collet M, Vayssade C, Auguste A, Mouton L, Desouhant E, Malausa T, Fauvergue X. Diploid male production correlates with genetic diversity in the parasitoid wasp Venturia canescens: a genetic approach with new microsatellite markers. Ecol Evol 2016; 6:6721-6734. [PMID: 27777743 PMCID: PMC5058541 DOI: 10.1002/ece3.2370] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Revised: 07/12/2016] [Accepted: 07/18/2016] [Indexed: 11/06/2022] Open
Abstract
Sex determination is ruled by haplodiploidy in Hymenoptera, with haploid males arising from unfertilized eggs and diploid females from fertilized eggs. However, diploid males with null fitness are produced under complementary sex determination (CSD), when individuals are homozygous for this locus. Diploid males are expected to be more frequent in genetically eroded populations (such as islands and captive populations), as genetic diversity at the csd locus should be low. However, only a few studies have focused on the relation between population size, genetic diversity, and the proportion of diploid males in the field. Here, we developed new microsatellite markers in order to assess and compare genetic diversity and diploid male proportion (DMP) in populations from three distinct habitat types - mainland, island, or captive -, in the parasitoid wasp Venturia canescens. Eroded genetic diversity and higher DMP were found in island and captive populations, and habitat type had large effect on genetic diversity. Therefore, DMP reflects the decreasing genetic diversity in small and isolated populations. Thus, Hymenopteran populations can be at high extinction risk due to habitat destruction or fragmentation.
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Affiliation(s)
- Marie Collet
- Laboratoire de Biométrie et Biologie Evolutive UMR 5558CNRSUniversité Claude BernardUniversité de LyonF‐69622VilleurbanneFrance
| | - Chloé Vayssade
- UMR 1355‐7254 Institut Sophia AgrobiotechCNRSUniversité Nice Sophia AntipolisINRA06900Sophia AntipolisFrance
| | - Alexandra Auguste
- UMR 1355‐7254 Institut Sophia AgrobiotechCNRSUniversité Nice Sophia AntipolisINRA06900Sophia AntipolisFrance
| | - Laurence Mouton
- Laboratoire de Biométrie et Biologie Evolutive UMR 5558CNRSUniversité Claude BernardUniversité de LyonF‐69622VilleurbanneFrance
| | - Emmanuel Desouhant
- Laboratoire de Biométrie et Biologie Evolutive UMR 5558CNRSUniversité Claude BernardUniversité de LyonF‐69622VilleurbanneFrance
| | - Thibaut Malausa
- UMR 1355‐7254 Institut Sophia AgrobiotechCNRSUniversité Nice Sophia AntipolisINRA06900Sophia AntipolisFrance
| | - Xavier Fauvergue
- UMR 1355‐7254 Institut Sophia AgrobiotechCNRSUniversité Nice Sophia AntipolisINRA06900Sophia AntipolisFrance
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9
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Glover KA, Bos JB, Urdal K, Madhun AS, Sørvik AGE, Unneland L, Seliussen BB, Skaala Ø, Skilbrei OT, Tang Y, Wennevik V. Genetic screening of farmed Atlantic salmon escapees demonstrates that triploid fish display reduced migration to freshwater. Biol Invasions 2016. [DOI: 10.1007/s10530-016-1066-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Darrouzet E, Gévar J, Guignard Q, Aron S. Production of Early Diploid Males by European Colonies of the Invasive Hornet Vespa velutina nigrithorax. PLoS One 2015; 10:e0136680. [PMID: 26414951 PMCID: PMC4586377 DOI: 10.1371/journal.pone.0136680] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Accepted: 08/06/2015] [Indexed: 11/19/2022] Open
Abstract
The invasive yellow-legged hornet Vespa velutina nigrithorax was accidentally introduced in Europe in the early 2000s. As is the case in colonies of other wasp and hornet species, V. velutina colonies are known to produce sexuals (males and new queens) at the end of the summer. We show that early-stage colonies in French populations frequently produce males well before the usual reproductive period. The vast majority of the males produced are diploid, which is consistent with the loss of genetic diversity previously reported in introduced populations in France. Since males do not participate in colony activities, the production of early diploid males at the expense of workers is expected to hamper colony growth and, ultimately, decrease the expansion of the species in its invasive range in Europe.
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Affiliation(s)
- Eric Darrouzet
- IRBI, UMR CNRS 7261, University of Tours, Faculty of Sciences, Parc de Grandmont, 37200 Tours, France
- * E-mail:
| | - Jérémy Gévar
- IRBI, UMR CNRS 7261, University of Tours, Faculty of Sciences, Parc de Grandmont, 37200 Tours, France
| | - Quentin Guignard
- IRBI, UMR CNRS 7261, University of Tours, Faculty of Sciences, Parc de Grandmont, 37200 Tours, France
| | - Serge Aron
- Evolution Biologique & Ecologie, Université Libre de Bruxelles, 1050 Brussels, Belgium
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Woodard SH, Lozier JD, Goulson D, Williams PH, Strange JP, Jha S. Molecular tools and bumble bees: revealing hidden details of ecology and evolution in a model system. Mol Ecol 2015; 24:2916-36. [PMID: 25865395 DOI: 10.1111/mec.13198] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Revised: 04/07/2015] [Accepted: 04/08/2015] [Indexed: 01/15/2023]
Abstract
Bumble bees are a longstanding model system for studies on behaviour, ecology and evolution, due to their well-studied social lifestyle, invaluable role as wild and managed pollinators, and ubiquity and diversity across temperate ecosystems. Yet despite their importance, many aspects of bumble bee biology have remained enigmatic until the rise of the genetic and, more recently, genomic eras. Here, we review and synthesize new insights into the ecology, evolution and behaviour of bumble bees that have been gained using modern genetic and genomic techniques. Special emphasis is placed on four areas of bumble bee biology: the evolution of eusociality in this group, population-level processes, large-scale evolutionary relationships and patterns, and immunity and resistance to pesticides. We close with a prospective on the future of bumble bee genomics research, as this rapidly advancing field has the potential to further revolutionize our understanding of bumble bees, particularly in regard to adaptation and resilience. Worldwide, many bumble bee populations are in decline. As such, throughout the review, connections are drawn between new molecular insights into bumble bees and our understanding of the causal factors involved in their decline. Ongoing and potential applications to bumble bee management and conservation are also included to demonstrate how genetics- and genomics-enabled research aids in the preservation of this threatened group.
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Affiliation(s)
- S Hollis Woodard
- Department of Integrative Biology, University of Texas, Austin, TX, 78712, USA.,Department of Entomology, University of California, Riverside, CA, 92521, USA
| | - Jeffrey D Lozier
- Department of Biological Sciences, University of Alabama, Tuscaloosa, AL, 35401, USA
| | - David Goulson
- Evolution, Behaviour & Environment, School of Life Sciences, University of Sussex, Falmer, East Sussex, BN1 9QG, UK
| | - Paul H Williams
- Department of Life Sciences, Natural History Museum, London, SW7 5BD, UK
| | - James P Strange
- USDA-ARS, Pollinating Insect Research Unit, Utah State University, Logan, UT, 84322, USA
| | - Shalene Jha
- Department of Integrative Biology, University of Texas, Austin, TX, 78712, USA
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12
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Glover KA, Madhun AS, Dahle G, Sørvik AGE, Wennevik V, Skaala Ø, Morton HC, Hansen TJ, Fjelldal PG. The frequency of spontaneous triploidy in farmed Atlantic salmon produced in Norway during the period 2007-2014. BMC Genet 2015; 16:37. [PMID: 25884873 PMCID: PMC4396060 DOI: 10.1186/s12863-015-0193-0] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Accepted: 03/25/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Spontaneous triploidy has been reported in a number of fish species, and is often linked with in vivo or in vitro ageing of eggs post ovulation. Here, we provide the first investigation into the frequency of spontaneous triploidy in farmed Atlantic salmon by analysing more than 4000 fish from 55 farms, and approximately 1000 recaptured escapees, all sampled in the period 2007-2014. In addition, we compare microsatellite genotyping against flow cytometry and red blood cell diameter in a set of 45 putatively diploid and 45 putatively triploid Atlantic salmon. RESULTS The three methods implemented for ploidy determination gave consistent results, thus validating the methods used here. Overall, 2.0% spontaneous triploids were observed in salmon sampled on farms. The frequency of spontaneous triploids varied greatly among sea cages (0-28%), but they were observed in similar frequencies among the three primary breeding companies (1.8-2.4%). Spontaneous triploids were observed in all farming regions in Norway, and in all years sampled. Spontaneous triploids were also observed among the escapees recaptured in both the marine environment and in rivers. CONCLUSIONS Spontaneous triploidy in commercially produced Atlantic salmon is likely to be a result of the practices employed by the industry. For logistical reasons, there is sometimes a pause of hours, and in some cases overnight, between killing the female broodfish, removal of her eggs, and fertilization. This gives the eggs time to age post ovulation, and increases the probability of duplication of the maternal chromosome set by inhibition of the second polar body release after normal meiosis II in the oocyte.
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Affiliation(s)
- Kevin A Glover
- Institute of Marine Research, PO Box 1870, Nordnes, 5817, Bergen, Norway.
| | - Abdullah S Madhun
- Institute of Marine Research, PO Box 1870, Nordnes, 5817, Bergen, Norway.
| | - Geir Dahle
- Institute of Marine Research, PO Box 1870, Nordnes, 5817, Bergen, Norway.
| | - Anne G E Sørvik
- Institute of Marine Research, PO Box 1870, Nordnes, 5817, Bergen, Norway.
| | - Vidar Wennevik
- Institute of Marine Research, PO Box 1870, Nordnes, 5817, Bergen, Norway.
| | - Øystein Skaala
- Institute of Marine Research, PO Box 1870, Nordnes, 5817, Bergen, Norway.
| | - H Craig Morton
- Institute of Marine Research, PO Box 1870, Nordnes, 5817, Bergen, Norway.
| | - Tom J Hansen
- Institute of Marine Research, PO Box 1870, Nordnes, 5817, Bergen, Norway.
| | - Per G Fjelldal
- Institute of Marine Research, PO Box 1870, Nordnes, 5817, Bergen, Norway.
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13
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Tsuchida K, Kudô K, Ishiguro N. Genetic structure of an introduced paper wasp,Polistes chinensis antennalis(Hymenoptera, Vespidae) in New Zealand. Mol Ecol 2014; 23:4018-34. [DOI: 10.1111/mec.12852] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2013] [Revised: 06/21/2014] [Accepted: 06/25/2014] [Indexed: 12/29/2022]
Affiliation(s)
- Koji Tsuchida
- Laboratory of Insect Ecology; Faculty of Applied Biological Sciences; Gifu University; Yanagido1-1 Gifu 501-1193 Japan
- School of Biological Sciences; Faculty of Science; University of Auckland; Auckland 1072 New Zealand
| | - Kazuyuki Kudô
- Laboratory of Entomology; Faculty of Education and Human Sciences; Niigata University; Niigata 950-2181 Japan
| | - Norio Ishiguro
- Laboratory of Insect Ecology; Faculty of Applied Biological Sciences; Gifu University; Yanagido1-1 Gifu 501-1193 Japan
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14
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Dreier S, Redhead JW, Warren IA, Bourke AFG, Heard MS, Jordan WC, Sumner S, Wang J, Carvell C. Fine-scale spatial genetic structure of common and declining bumble bees across an agricultural landscape. Mol Ecol 2014; 23:3384-95. [PMID: 24980963 PMCID: PMC4142012 DOI: 10.1111/mec.12823] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Revised: 05/07/2014] [Accepted: 05/21/2014] [Indexed: 02/04/2023]
Abstract
Land-use changes have threatened populations of many insect pollinators, including bumble bees. Patterns of dispersal and gene flow are key determinants of species' ability to respond to land-use change, but have been little investigated at a fine scale (<10 km) in bumble bees. Using microsatellite markers, we determined the fine-scale spatial genetic structure of populations of four common Bombus species (B. terrestris, B. lapidarius, B. pascuorum and B. hortorum) and one declining species (B. ruderatus) in an agricultural landscape in Southern England, UK. The study landscape contained sown flower patches representing agri-environment options for pollinators. We found that, as expected, the B. ruderatus population was characterized by relatively low heterozygosity, number of alleles and colony density. Across all species, inbreeding was absent or present but weak (FIS = 0.01-0.02). Using queen genotypes reconstructed from worker sibships and colony locations estimated from the positions of workers within these sibships, we found that significant isolation by distance was absent in B. lapidarius, B. hortorum and B. ruderatus. In B. terrestris and B. pascuorum, it was present but weak; for example, in these two species, expected relatedness of queens founding colonies 1 m apart was 0.02. These results show that bumble bee populations exhibit low levels of spatial genetic structure at fine spatial scales, most likely because of ongoing gene flow via widespread queen dispersal. In addition, the results demonstrate the potential for agri-environment scheme conservation measures to facilitate fine-scale gene flow by creating a more even distribution of suitable habitats across landscapes.
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Affiliation(s)
- Stephanie Dreier
- Institute of Zoology, Zoological Society of London, Regent's Park, London, NW1 4RY, UK; School of Biological Sciences, University of Bristol, Woodland Road, Bristol, BS8 1UG, UK
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15
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Fertile diploid males in the ant Cataglyphis cursor: a potential cost of thelytoky? Behav Ecol Sociobiol 2013. [DOI: 10.1007/s00265-013-1606-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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16
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Doums C, Cronin AL, Ruel C, Fédérici P, Haussy C, Tirard C, Monnin T. Facultative use of thelytokous parthenogenesis for queen production in the polyandrous ant Cataglyphis cursor. J Evol Biol 2013; 26:1431-44. [PMID: 23639217 DOI: 10.1111/jeb.12142] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Revised: 01/30/2013] [Accepted: 02/13/2013] [Indexed: 11/27/2022]
Abstract
The evolutionary paradox of sex remains one of the major debates in evolutionary biology. The study of species capable of both sexual and asexual reproduction can elucidate factors important in the evolution of sex. One such species is the ant Cataglyphis cursor, where the queen maximizes the transmission of her genes by producing new queens (gynes) asexually while simultaneously maintaining a genetically diverse workforce via the sexual production of workers. We show that the queen can also produce gynes sexually and may do so to offset the costs of asexual reproduction. We genotyped 235 gynes from 18 colonies and found that half were sexually produced. A few colonies contained both sexually and asexually produced gynes. Although workers in this species can also use thelytoky, we found no evidence of worker production of gynes based on genotypes of 471 workers from the six colonies producing sexual gynes. Gynes are thus mainly, and potentially exclusively, produced by the queen. Simulations of gynes inbreeding level following one to ten generations of automictic thelytoky suggest that the queen switches between or combines thelytoky and sex, which may reduce the costs of inbreeding. This is supported by the relatively small size of inbred gynes in one colony, although we found no relationship between the level of inbreeding and immune parameters. Such facultative use of sex and thelytoky by individual queens contrasts with other known forms of parthenogenesis in ants, which are typically characterized by distinct lineages specializing in one strategy or the other.
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Affiliation(s)
- C Doums
- Laboratoire Ecologie & Evolution CNRS UMR 7625, Université Pierre et Marie Curie, Paris, France.
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Choleva L, Janko K. Rise and Persistence of Animal Polyploidy: Evolutionary Constraints and Potential. Cytogenet Genome Res 2013; 140:151-70. [DOI: 10.1159/000353464] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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