--- _id: '282' abstract: - lang: eng text: Adaptive introgression is common in nature and can be driven by selection acting on multiple, linked genes. We explore the effects of polygenic selection on introgression under the infinitesimal model with linkage. This model assumes that the introgressing block has an effectively infinite number of genes, each with an infinitesimal effect on the trait under selection. The block is assumed to introgress under directional selection within a native population that is genetically homogeneous. We use individual-based simulations and a branching process approximation to compute various statistics of the introgressing block, and explore how these depend on parameters such as the map length and initial trait value associated with the introgressing block, the genetic variability along the block, and the strength of selection. Our results show that the introgression dynamics of a block under infinitesimal selection is qualitatively different from the dynamics of neutral introgression. We also find that in the long run, surviving descendant blocks are likely to have intermediate lengths, and clarify how the length is shaped by the interplay between linkage and infinitesimal selection. Our results suggest that it may be difficult to distinguish introgression of single loci from that of genomic blocks with multiple, tightly linked and weakly selected loci. article_processing_charge: No author: - first_name: Himani full_name: Sachdeva, Himani id: 42377A0A-F248-11E8-B48F-1D18A9856A87 last_name: Sachdeva - first_name: Nicholas H full_name: Barton, Nicholas H id: 4880FE40-F248-11E8-B48F-1D18A9856A87 last_name: Barton orcid: 0000-0002-8548-5240 citation: ama: Sachdeva H, Barton NH. Introgression of a block of genome under infinitesimal selection. Genetics. 2018;209(4):1279-1303. doi:10.1534/genetics.118.301018 apa: Sachdeva, H., & Barton, N. H. (2018). Introgression of a block of genome under infinitesimal selection. Genetics. Genetics Society of America. https://doi.org/10.1534/genetics.118.301018 chicago: Sachdeva, Himani, and Nicholas H Barton. “Introgression of a Block of Genome under Infinitesimal Selection.” Genetics. Genetics Society of America, 2018. https://doi.org/10.1534/genetics.118.301018. ieee: H. Sachdeva and N. H. Barton, “Introgression of a block of genome under infinitesimal selection,” Genetics, vol. 209, no. 4. Genetics Society of America, pp. 1279–1303, 2018. ista: Sachdeva H, Barton NH. 2018. Introgression of a block of genome under infinitesimal selection. Genetics. 209(4), 1279–1303. mla: Sachdeva, Himani, and Nicholas H. Barton. “Introgression of a Block of Genome under Infinitesimal Selection.” Genetics, vol. 209, no. 4, Genetics Society of America, 2018, pp. 1279–303, doi:10.1534/genetics.118.301018. short: H. Sachdeva, N.H. Barton, Genetics 209 (2018) 1279–1303. date_created: 2018-12-11T11:45:36Z date_published: 2018-08-01T00:00:00Z date_updated: 2023-09-13T08:22:32Z day: '01' department: - _id: NiBa doi: 10.1534/genetics.118.301018 external_id: isi: - '000440014100020' intvolume: ' 209' isi: 1 issue: '4' language: - iso: eng main_file_link: - open_access: '1' url: https://www.biorxiv.org/content/early/2017/11/30/227082 month: '08' oa: 1 oa_version: Submitted Version page: 1279 - 1303 publication: Genetics publication_status: published publisher: Genetics Society of America publist_id: '7617' quality_controlled: '1' scopus_import: '1' status: public title: Introgression of a block of genome under infinitesimal selection type: journal_article user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: 209 year: '2018' ... --- _id: '39' abstract: - lang: eng text: We study how a block of genome with a large number of weakly selected loci introgresses under directional selection into a genetically homogeneous population. We derive exact expressions for the expected rate of growth of any fragment of the introduced block during the initial phase of introgression, and show that the growth rate of a single-locus variant is largely insensitive to its own additive effect, but depends instead on the combined effect of all loci within a characteristic linkage scale. The expected growth rate of a fragment is highly correlated with its long-term introgression probability in populations of moderate size, and can hence identify variants that are likely to introgress across replicate populations. We clarify how the introgression probability of an individual variant is determined by the interplay between hitchhiking with relatively large fragments during the early phase of introgression and selection on fine-scale variation within these, which at longer times results in differential introgression probabilities for beneficial and deleterious loci within successful fragments. By simulating individuals, we also investigate how introgression probabilities at individual loci depend on the variance of fitness effects, the net fitness of the introduced block, and the size of the recipient population, and how this shapes the net advance under selection. Our work suggests that even highly replicable substitutions may be associated with a range of selective effects, which makes it challenging to fine map the causal loci that underlie polygenic adaptation. article_processing_charge: No article_type: original author: - first_name: Himani full_name: Sachdeva, Himani id: 42377A0A-F248-11E8-B48F-1D18A9856A87 last_name: Sachdeva - first_name: Nicholas H full_name: Barton, Nicholas H id: 4880FE40-F248-11E8-B48F-1D18A9856A87 last_name: Barton orcid: 0000-0002-8548-5240 citation: ama: Sachdeva H, Barton NH. Replicability of introgression under linked, polygenic selection. Genetics. 2018;210(4):1411-1427. doi:10.1534/genetics.118.301429 apa: Sachdeva, H., & Barton, N. H. (2018). Replicability of introgression under linked, polygenic selection. Genetics. Genetics Society of America. https://doi.org/10.1534/genetics.118.301429 chicago: Sachdeva, Himani, and Nicholas H Barton. “Replicability of Introgression under Linked, Polygenic Selection.” Genetics. Genetics Society of America, 2018. https://doi.org/10.1534/genetics.118.301429. ieee: H. Sachdeva and N. H. Barton, “Replicability of introgression under linked, polygenic selection,” Genetics, vol. 210, no. 4. Genetics Society of America, pp. 1411–1427, 2018. ista: Sachdeva H, Barton NH. 2018. Replicability of introgression under linked, polygenic selection. Genetics. 210(4), 1411–1427. mla: Sachdeva, Himani, and Nicholas H. Barton. “Replicability of Introgression under Linked, Polygenic Selection.” Genetics, vol. 210, no. 4, Genetics Society of America, 2018, pp. 1411–27, doi:10.1534/genetics.118.301429. short: H. Sachdeva, N.H. Barton, Genetics 210 (2018) 1411–1427. date_created: 2018-12-11T11:44:18Z date_published: 2018-12-04T00:00:00Z date_updated: 2023-09-18T08:10:29Z day: '04' department: - _id: NiBa doi: 10.1534/genetics.118.301429 external_id: isi: - '000452315900021' intvolume: ' 210' isi: 1 issue: '4' language: - iso: eng main_file_link: - open_access: '1' url: https://www.biorxiv.org/content/10.1101/379578v1 month: '12' oa: 1 oa_version: Preprint page: 1411-1427 publication: Genetics publication_identifier: issn: - '00166731' publication_status: published publisher: Genetics Society of America quality_controlled: '1' scopus_import: '1' status: public title: Replicability of introgression under linked, polygenic selection type: journal_article user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: 210 year: '2018' ... --- _id: '38' abstract: - lang: eng text: 'Genomes of closely-related species or populations often display localized regions of enhanced relative sequence divergence, termed genomic islands. It has been proposed that these islands arise through selective sweeps and/or barriers to gene flow. Here, we genetically dissect a genomic island that controls flower color pattern differences between two subspecies of Antirrhinum majus, A.m.striatum and A.m.pseudomajus, and relate it to clinal variation across a natural hybrid zone. We show that selective sweeps likely raised relative divergence at two tightly-linked MYB-like transcription factors, leading to distinct flower patterns in the two subspecies. The two patterns provide alternate floral guides and create a strong barrier to gene flow where populations come into contact. This barrier affects the selected flower color genes and tightlylinked loci, but does not extend outside of this domain, allowing gene flow to lower relative divergence for the rest of the chromosome. Thus, both selective sweeps and barriers to gene flow play a role in shaping genomic islands: sweeps cause elevation in relative divergence, while heterogeneous gene flow flattens the surrounding "sea," making the island of divergence stand out. By showing how selective sweeps establish alternative adaptive phenotypes that lead to barriers to gene flow, our study sheds light on possible mechanisms leading to reproductive isolation and speciation.' acknowledgement: ' ERC Grant 201252 (to N.H.B.)' article_processing_charge: No author: - first_name: Hugo full_name: Tavares, Hugo last_name: Tavares - first_name: Annabel full_name: Whitley, Annabel last_name: Whitley - first_name: David full_name: Field, David id: 419049E2-F248-11E8-B48F-1D18A9856A87 last_name: Field orcid: 0000-0002-4014-8478 - first_name: Desmond full_name: Bradley, Desmond last_name: Bradley - first_name: Matthew full_name: Couchman, Matthew last_name: Couchman - first_name: Lucy full_name: Copsey, Lucy last_name: Copsey - first_name: Joane full_name: Elleouet, Joane last_name: Elleouet - first_name: Monique full_name: Burrus, Monique last_name: Burrus - first_name: Christophe full_name: Andalo, Christophe last_name: Andalo - first_name: Miaomiao full_name: Li, Miaomiao last_name: Li - first_name: Qun full_name: Li, Qun last_name: Li - first_name: Yongbiao full_name: Xue, Yongbiao last_name: Xue - first_name: Alexandra B full_name: Rebocho, Alexandra B last_name: Rebocho - first_name: Nicholas H full_name: Barton, Nicholas H id: 4880FE40-F248-11E8-B48F-1D18A9856A87 last_name: Barton orcid: 0000-0002-8548-5240 - first_name: Enrico full_name: Coen, Enrico last_name: Coen citation: ama: Tavares H, Whitley A, Field D, et al. Selection and gene flow shape genomic islands that control floral guides. PNAS. 2018;115(43):11006-11011. doi:10.1073/pnas.1801832115 apa: Tavares, H., Whitley, A., Field, D., Bradley, D., Couchman, M., Copsey, L., … Coen, E. (2018). Selection and gene flow shape genomic islands that control floral guides. PNAS. National Academy of Sciences. https://doi.org/10.1073/pnas.1801832115 chicago: Tavares, Hugo, Annabel Whitley, David Field, Desmond Bradley, Matthew Couchman, Lucy Copsey, Joane Elleouet, et al. “Selection and Gene Flow Shape Genomic Islands That Control Floral Guides.” PNAS. National Academy of Sciences, 2018. https://doi.org/10.1073/pnas.1801832115. ieee: H. Tavares et al., “Selection and gene flow shape genomic islands that control floral guides,” PNAS, vol. 115, no. 43. National Academy of Sciences, pp. 11006–11011, 2018. ista: Tavares H, Whitley A, Field D, Bradley D, Couchman M, Copsey L, Elleouet J, Burrus M, Andalo C, Li M, Li Q, Xue Y, Rebocho AB, Barton NH, Coen E. 2018. Selection and gene flow shape genomic islands that control floral guides. PNAS. 115(43), 11006–11011. mla: Tavares, Hugo, et al. “Selection and Gene Flow Shape Genomic Islands That Control Floral Guides.” PNAS, vol. 115, no. 43, National Academy of Sciences, 2018, pp. 11006–11, doi:10.1073/pnas.1801832115. short: H. Tavares, A. Whitley, D. Field, D. Bradley, M. Couchman, L. Copsey, J. Elleouet, M. Burrus, C. Andalo, M. Li, Q. Li, Y. Xue, A.B. Rebocho, N.H. Barton, E. Coen, PNAS 115 (2018) 11006–11011. date_created: 2018-12-11T11:44:18Z date_published: 2018-10-23T00:00:00Z date_updated: 2023-09-18T08:36:49Z day: '23' ddc: - '570' department: - _id: NiBa doi: 10.1073/pnas.1801832115 external_id: isi: - '000448040500065' pmid: - '30297406' file: - access_level: open_access checksum: d2305d0cc81dbbe4c1c677d64ad6f6d1 content_type: application/pdf creator: dernst date_created: 2018-12-17T08:44:03Z date_updated: 2020-07-14T12:46:16Z file_id: '5683' file_name: 11006.full.pdf file_size: 1911302 relation: main_file file_date_updated: 2020-07-14T12:46:16Z has_accepted_license: '1' intvolume: ' 115' isi: 1 issue: '43' language: - iso: eng license: https://creativecommons.org/licenses/by-nc-nd/4.0/ month: '10' oa: 1 oa_version: Published Version page: 11006 - 11011 pmid: 1 publication: PNAS publication_identifier: issn: - '00278424' publication_status: published publisher: National Academy of Sciences publist_id: '8017' quality_controlled: '1' scopus_import: '1' status: public title: Selection and gene flow shape genomic islands that control floral guides tmp: image: /images/cc_by_nc_nd.png legal_code_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode name: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) short: CC BY-NC-ND (4.0) type: journal_article user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: 115 year: '2018' ... --- _id: '40' abstract: - lang: eng text: Hanemaaijer et al. (Molecular Ecology, 27, 2018) describe the genetic consequences of the introgression of an insecticide resistance allele into a mosquito population. Linked alleles initially increased, but many of these later declined. It is hard to determine whether this decline was due to counter‐selection, rather than simply to chance. article_processing_charge: Yes (via OA deal) article_type: letter_note author: - first_name: Nicholas H full_name: Barton, Nicholas H id: 4880FE40-F248-11E8-B48F-1D18A9856A87 last_name: Barton orcid: 0000-0002-8548-5240 citation: ama: Barton NH. The consequences of an introgression event. Molecular Ecology. 2018;27(24):4973-4975. doi:10.1111/mec.14950 apa: Barton, N. H. (2018). The consequences of an introgression event. Molecular Ecology. Wiley. https://doi.org/10.1111/mec.14950 chicago: Barton, Nicholas H. “The Consequences of an Introgression Event.” Molecular Ecology. Wiley, 2018. https://doi.org/10.1111/mec.14950. ieee: N. H. Barton, “The consequences of an introgression event,” Molecular Ecology, vol. 27, no. 24. Wiley, pp. 4973–4975, 2018. ista: Barton NH. 2018. The consequences of an introgression event. Molecular Ecology. 27(24), 4973–4975. mla: Barton, Nicholas H. “The Consequences of an Introgression Event.” Molecular Ecology, vol. 27, no. 24, Wiley, 2018, pp. 4973–75, doi:10.1111/mec.14950. short: N.H. Barton, Molecular Ecology 27 (2018) 4973–4975. date_created: 2018-12-11T11:44:18Z date_published: 2018-12-31T00:00:00Z date_updated: 2023-09-19T10:06:08Z day: '31' ddc: - '576' department: - _id: NiBa doi: 10.1111/mec.14950 external_id: isi: - '000454600500001' pmid: - '30599087' file: - access_level: open_access content_type: application/pdf creator: apreinsp date_created: 2019-07-19T06:54:46Z date_updated: 2020-07-14T12:46:22Z file_id: '6652' file_name: 2018_MolecularEcology_BartonNick.pdf file_size: 295452 relation: main_file file_date_updated: 2020-07-14T12:46:22Z has_accepted_license: '1' intvolume: ' 27' isi: 1 issue: '24' language: - iso: eng month: '12' oa: 1 oa_version: Published Version page: 4973-4975 pmid: 1 publication: Molecular Ecology publication_identifier: issn: - 1365294X publication_status: published publisher: Wiley publist_id: '8014' quality_controlled: '1' related_material: record: - id: '9805' relation: research_data status: public scopus_import: '1' status: public title: The consequences of an introgression event tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: 27 year: '2018' ... --- _id: '565' abstract: - lang: eng text: 'We re-examine the model of Kirkpatrick and Barton for the spread of an inversion into a local population. This model assumes that local selection maintains alleles at two or more loci, despite immigration of alternative alleles at these loci from another population. We show that an inversion is favored because it prevents the breakdown of linkage disequilibrium generated by migration; the selective advantage of an inversion is proportional to the amount of recombination between the loci involved, as in other cases where inversions are selected for. We derive expressions for the rate of spread of an inversion; when the loci covered by the inversion are tightly linked, these conditions deviate substantially from those proposed previously, and imply that an inversion can then have only a small advantage. ' article_processing_charge: No article_type: original author: - first_name: Brian full_name: Charlesworth, Brian last_name: Charlesworth - first_name: Nicholas H full_name: Barton, Nicholas H id: 4880FE40-F248-11E8-B48F-1D18A9856A87 last_name: Barton orcid: 0000-0002-8548-5240 citation: ama: Charlesworth B, Barton NH. The spread of an inversion with migration and selection. Genetics. 2018;208(1):377-382. doi:10.1534/genetics.117.300426 apa: Charlesworth, B., & Barton, N. H. (2018). The spread of an inversion with migration and selection. Genetics. Genetics . https://doi.org/10.1534/genetics.117.300426 chicago: Charlesworth, Brian, and Nicholas H Barton. “The Spread of an Inversion with Migration and Selection.” Genetics. Genetics , 2018. https://doi.org/10.1534/genetics.117.300426. ieee: B. Charlesworth and N. H. Barton, “The spread of an inversion with migration and selection,” Genetics, vol. 208, no. 1. Genetics , pp. 377–382, 2018. ista: Charlesworth B, Barton NH. 2018. The spread of an inversion with migration and selection. Genetics. 208(1), 377–382. mla: Charlesworth, Brian, and Nicholas H. Barton. “The Spread of an Inversion with Migration and Selection.” Genetics, vol. 208, no. 1, Genetics , 2018, pp. 377–82, doi:10.1534/genetics.117.300426. short: B. Charlesworth, N.H. Barton, Genetics 208 (2018) 377–382. date_created: 2018-12-11T11:47:12Z date_published: 2018-01-01T00:00:00Z date_updated: 2023-09-19T10:12:31Z day: '01' department: - _id: NiBa doi: 10.1534/genetics.117.300426 external_id: isi: - '000419356300025' pmid: - '29158424' intvolume: ' 208' isi: 1 issue: '1' language: - iso: eng main_file_link: - open_access: '1' url: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5753870/ month: '01' oa: 1 oa_version: Published Version page: 377 - 382 pmid: 1 publication: Genetics publication_status: published publisher: 'Genetics ' publist_id: '7249' quality_controlled: '1' scopus_import: '1' status: public title: The spread of an inversion with migration and selection type: journal_article user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: 208 year: '2018' ...