{"publist_id":"7250","volume":122,"intvolume":"       122","year":"2018","file_date_updated":"2020-07-14T12:47:09Z","isi":1,"ddc":["519","576"],"project":[{"name":"Limits to selection in biology and in evolutionary computation","_id":"25B07788-B435-11E9-9278-68D0E5697425","grant_number":"250152","call_identifier":"FP7"}],"doi":"10.1016/j.tpb.2017.11.007","page":"110-127","publication":"Theoretical Population Biology","has_accepted_license":"1","author":[{"id":"4880FE40-F248-11E8-B48F-1D18A9856A87","full_name":"Barton, Nicholas H","last_name":"Barton","first_name":"Nicholas H","orcid":"0000-0002-8548-5240"},{"full_name":"Etheridge, Alison","last_name":"Etheridge","first_name":"Alison"}],"external_id":{"isi":["000440392900014"]},"ec_funded":1,"article_type":"original","citation":{"ista":"Barton NH, Etheridge A. 2018. Establishment in a new habitat by polygenic adaptation. Theoretical Population Biology. 122(7), 110–127.","apa":"Barton, N. H., &#38; Etheridge, A. (2018). Establishment in a new habitat by polygenic adaptation. <i>Theoretical Population Biology</i>. Academic Press. <a href=\"https://doi.org/10.1016/j.tpb.2017.11.007\">https://doi.org/10.1016/j.tpb.2017.11.007</a>","chicago":"Barton, Nicholas H, and Alison Etheridge. “Establishment in a New Habitat by Polygenic Adaptation.” <i>Theoretical Population Biology</i>. Academic Press, 2018. <a href=\"https://doi.org/10.1016/j.tpb.2017.11.007\">https://doi.org/10.1016/j.tpb.2017.11.007</a>.","ama":"Barton NH, Etheridge A. Establishment in a new habitat by polygenic adaptation. <i>Theoretical Population Biology</i>. 2018;122(7):110-127. doi:<a href=\"https://doi.org/10.1016/j.tpb.2017.11.007\">10.1016/j.tpb.2017.11.007</a>","short":"N.H. Barton, A. Etheridge, Theoretical Population Biology 122 (2018) 110–127.","mla":"Barton, Nicholas H., and Alison Etheridge. “Establishment in a New Habitat by Polygenic Adaptation.” <i>Theoretical Population Biology</i>, vol. 122, no. 7, Academic Press, 2018, pp. 110–27, doi:<a href=\"https://doi.org/10.1016/j.tpb.2017.11.007\">10.1016/j.tpb.2017.11.007</a>.","ieee":"N. H. Barton and A. Etheridge, “Establishment in a new habitat by polygenic adaptation,” <i>Theoretical Population Biology</i>, vol. 122, no. 7. Academic Press, pp. 110–127, 2018."},"language":[{"iso":"eng"}],"_id":"564","date_created":"2018-12-11T11:47:12Z","user_id":"c635000d-4b10-11ee-a964-aac5a93f6ac1","oa":1,"oa_version":"Submitted Version","scopus_import":"1","publisher":"Academic Press","related_material":{"record":[{"status":"public","relation":"research_data","id":"9842"}]},"status":"public","quality_controlled":"1","title":"Establishment in a new habitat by polygenic adaptation","day":"01","file":[{"date_updated":"2020-07-14T12:47:09Z","file_id":"7199","date_created":"2019-12-21T09:36:39Z","file_size":2287682,"checksum":"0b96f6db47e3e91b5e7d103b847c239d","relation":"main_file","content_type":"application/pdf","creator":"nbarton","access_level":"open_access","file_name":"bartonetheridge.pdf"}],"type":"journal_article","tmp":{"name":"Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)","image":"/images/cc_by_nc.png","short":"CC BY-NC (4.0)","legal_code_url":"https://creativecommons.org/licenses/by-nc/4.0/legalcode"},"date_updated":"2023-09-11T13:41:22Z","article_processing_charge":"No","month":"07","issue":"7","date_published":"2018-07-01T00:00:00Z","publication_status":"published","abstract":[{"lang":"eng","text":"Maladapted individuals can only colonise a new habitat if they can evolve a\r\npositive growth rate fast enough to avoid extinction, a process known as evolutionary\r\nrescue. We treat log fitness at low density in the new habitat as a\r\nsingle polygenic trait and thus use the infinitesimal model to follow the evolution\r\nof the growth rate; this assumes that the trait values of offspring of a\r\nsexual union are normally distributed around the mean of the parents’ trait\r\nvalues, with variance that depends only on the parents’ relatedness. The\r\nprobability that a single migrant can establish depends on just two parameters:\r\nthe mean and genetic variance of the trait in the source population.\r\nThe chance of success becomes small if migrants come from a population\r\nwith mean growth rate in the new habitat more than a few standard deviations\r\nbelow zero; this chance depends roughly equally on the probability\r\nthat the initial founder is unusually fit, and on the subsequent increase in\r\ngrowth rate of its offspring as a result of selection. The loss of genetic variation\r\nduring the founding event is substantial, but highly variable. With\r\ncontinued migration at rate M, establishment is inevitable; when migration\r\nis rare, the expected time to establishment decreases inversely with M.\r\nHowever, above a threshold migration rate, the population may be trapped\r\nin a ‘sink’ state, in which adaptation is held back by gene flow; above this\r\nthreshold, the expected time to establishment increases exponentially with M. This threshold behaviour is captured by a deterministic approximation,\r\nwhich assumes a Gaussian distribution of the trait in the founder population\r\nwith mean and variance evolving deterministically. By assuming a constant\r\ngenetic variance, we also develop a diffusion approximation for the joint distribution\r\nof population size and trait mean, which extends to include stabilising\r\nselection and density regulation. Divergence of the population from its\r\nancestors causes partial reproductive isolation, which we measure through\r\nthe reproductive value of migrants into the newly established population."}],"department":[{"_id":"NiBa"}]}