[{"article_processing_charge":"No","article_type":"original","date_updated":"2024-10-30T14:40:02Z","type":"journal_article","publication":"Information Processing Letters","scopus_import":"1","main_file_link":[{"url":"https://www.sciencedirect.com/science/article/pii/0020019081900533","open_access":"1"}],"doi":"10.1016/0020-0190(81)90053-3","publication_status":"published","OA_type":"hybrid","day":"01","oa":1,"extern":"1","title":"On the intersection of Orthogonal objects","volume":13,"year":"1981","language":[{"iso":"eng"}],"publist_id":"1988","date_created":"2018-12-11T12:07:08Z","publisher":"Elsevier","citation":{"chicago":"Edelsbrunner, Herbert, and Hermann Maurer. “On the Intersection of Orthogonal Objects.” <i>Information Processing Letters</i>. Elsevier, 1981. <a href=\"https://doi.org/10.1016/0020-0190(81)90053-3\">https://doi.org/10.1016/0020-0190(81)90053-3</a>.","ista":"Edelsbrunner H, Maurer H. 1981. On the intersection of Orthogonal objects. Information Processing Letters. 13(4–5), 177–181.","short":"H. Edelsbrunner, H. Maurer, Information Processing Letters 13 (1981) 177–181.","mla":"Edelsbrunner, Herbert, and Hermann Maurer. “On the Intersection of Orthogonal Objects.” <i>Information Processing Letters</i>, vol. 13, no. 4–5, Elsevier, 1981, pp. 177–81, doi:<a href=\"https://doi.org/10.1016/0020-0190(81)90053-3\">10.1016/0020-0190(81)90053-3</a>.","ama":"Edelsbrunner H, Maurer H. On the intersection of Orthogonal objects. <i>Information Processing Letters</i>. 1981;13(4-5):177-181. doi:<a href=\"https://doi.org/10.1016/0020-0190(81)90053-3\">10.1016/0020-0190(81)90053-3</a>","ieee":"H. Edelsbrunner and H. Maurer, “On the intersection of Orthogonal objects,” <i>Information Processing Letters</i>, vol. 13, no. 4–5. Elsevier, pp. 177–181, 1981.","apa":"Edelsbrunner, H., &#38; Maurer, H. (1981). On the intersection of Orthogonal objects. <i>Information Processing Letters</i>. Elsevier. <a href=\"https://doi.org/10.1016/0020-0190(81)90053-3\">https://doi.org/10.1016/0020-0190(81)90053-3</a>"},"status":"public","month":"01","page":"177 - 181","quality_controlled":"1","date_published":"1981-01-01T00:00:00Z","publication_identifier":{"issn":["0020-0190"]},"issue":"4-5","intvolume":"        13","_id":"4132","OA_place":"publisher","author":[{"first_name":"Herbert","last_name":"Edelsbrunner","full_name":"Edelsbrunner, Herbert","id":"3FB178DA-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-9823-6833"},{"first_name":"Hermann","last_name":"Maurer","full_name":"Maurer, Hermann"}],"oa_version":"Published Version","user_id":"0043cee0-e5fc-11ee-9736-f83bc23afbf0"},{"article_processing_charge":"No","article_type":"original","scopus_import":"1","type":"journal_article","publication":"Theoretical Computer Science","date_updated":"2024-10-16T14:45:11Z","doi":"10.1016/0304-3975(81)90103-1","publication_status":"published","main_file_link":[{"url":"https://www.sciencedirect.com/science/article/pii/0304397581901031","open_access":"1"}],"publist_id":"1989","language":[{"iso":"eng"}],"abstract":[{"text":"In 1979 Kirpatrick obtained a practically feasible algorithm for planar regionlocation working in linear space and logarithmic time, provided the regions are bounded by straight line segments. No algorithm requiring only linear space and log-polynomial time was known, so far, for general planar regionlocation, i.e. for the case where regions are bounded by curves more complicated than straight line segments. As main result of this paper such an algorithm is presented.","lang":"eng"}],"extern":"1","oa":1,"OA_type":"hybrid","day":"01","year":"1981","title":"A space-optimal solution of general region location","volume":16,"month":"01","status":"public","page":"329 - 336","date_created":"2018-12-11T12:07:08Z","publisher":"Elsevier","citation":{"ieee":"H. Edelsbrunner and H. Maurer, “A space-optimal solution of general region location,” <i>Theoretical Computer Science</i>, vol. 16, no. 3. Elsevier, pp. 329–336, 1981.","apa":"Edelsbrunner, H., &#38; Maurer, H. (1981). A space-optimal solution of general region location. <i>Theoretical Computer Science</i>. Elsevier. <a href=\"https://doi.org/10.1016/0304-3975(81)90103-1\">https://doi.org/10.1016/0304-3975(81)90103-1</a>","ama":"Edelsbrunner H, Maurer H. A space-optimal solution of general region location. <i>Theoretical Computer Science</i>. 1981;16(3):329-336. doi:<a href=\"https://doi.org/10.1016/0304-3975(81)90103-1\">10.1016/0304-3975(81)90103-1</a>","chicago":"Edelsbrunner, Herbert, and Hermann Maurer. “A Space-Optimal Solution of General Region Location.” <i>Theoretical Computer Science</i>. Elsevier, 1981. <a href=\"https://doi.org/10.1016/0304-3975(81)90103-1\">https://doi.org/10.1016/0304-3975(81)90103-1</a>.","short":"H. Edelsbrunner, H. Maurer, Theoretical Computer Science 16 (1981) 329–336.","mla":"Edelsbrunner, Herbert, and Hermann Maurer. “A Space-Optimal Solution of General Region Location.” <i>Theoretical Computer Science</i>, vol. 16, no. 3, Elsevier, 1981, pp. 329–36, doi:<a href=\"https://doi.org/10.1016/0304-3975(81)90103-1\">10.1016/0304-3975(81)90103-1</a>.","ista":"Edelsbrunner H, Maurer H. 1981. A space-optimal solution of general region location. Theoretical Computer Science. 16(3), 329–336."},"_id":"4133","issue":"3","publication_identifier":{"issn":["0304-3975"]},"intvolume":"        16","quality_controlled":"1","date_published":"1981-01-01T00:00:00Z","user_id":"0043cee0-e5fc-11ee-9736-f83bc23afbf0","oa_version":"Published Version","OA_place":"publisher","author":[{"last_name":"Edelsbrunner","first_name":"Herbert","orcid":"0000-0002-9823-6833","full_name":"Edelsbrunner, Herbert","id":"3FB178DA-F248-11E8-B48F-1D18A9856A87"},{"full_name":"Maurer, Hermann","last_name":"Maurer","first_name":"Hermann"}]},{"_id":"4332","publication_identifier":{"isbn":["9-780-5212-3823-6"]},"publication":"Evolution and Speciation","type":"book_chapter","date_updated":"2021-12-16T08:24:04Z","quality_controlled":"1","date_published":"1981-05-29T00:00:00Z","article_processing_charge":"No","month":"05","status":"public","editor":[{"full_name":"Atchley, William","last_name":"Atchley","first_name":"William"},{"full_name":"Woodruff, David","first_name":"David","last_name":"Woodruff"}],"page":"109 - 145","date_created":"2018-12-11T12:08:18Z","citation":{"ieee":"N. H. Barton and G. Hewitt, “Hybrid zones and speciation,” in <i>Evolution and Speciation</i>, W. Atchley and D. Woodruff, Eds. Cambridge University Press, 1981, pp. 109–145.","ama":"Barton NH, Hewitt G. Hybrid zones and speciation. In: Atchley W, Woodruff D, eds. <i>Evolution and Speciation</i>. Cambridge University Press; 1981:109-145.","apa":"Barton, N. H., &#38; Hewitt, G. (1981). Hybrid zones and speciation. In W. Atchley &#38; D. Woodruff (Eds.), <i>Evolution and Speciation</i> (pp. 109–145). Cambridge University Press.","ista":"Barton NH, Hewitt G. 1981.Hybrid zones and speciation. In: Evolution and Speciation. , 109–145.","mla":"Barton, Nicholas H., and Godfrey Hewitt. “Hybrid Zones and Speciation.” <i>Evolution and Speciation</i>, edited by William Atchley and David Woodruff, Cambridge University Press, 1981, pp. 109–45.","short":"N.H. Barton, G. Hewitt, in:, W. Atchley, D. Woodruff (Eds.), Evolution and Speciation, Cambridge University Press, 1981, pp. 109–145.","chicago":"Barton, Nicholas H, and Godfrey Hewitt. “Hybrid Zones and Speciation.” In <i>Evolution and Speciation</i>, edited by William Atchley and David Woodruff, 109–45. Cambridge University Press, 1981."},"publisher":"Cambridge University Press","publist_id":"1702","language":[{"iso":"eng"}],"extern":"1","day":"29","year":"1981","title":"Hybrid zones and speciation","user_id":"8b945eb4-e2f2-11eb-945a-df72226e66a9","related_material":{"link":[{"relation":"other","url":"https://agris.fao.org/agris-search/search.do?recordID=US201302583227"}]},"oa_version":"None","publication_status":"published","author":[{"id":"4880FE40-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-8548-5240","full_name":"Barton, Nicholas H","last_name":"Barton","first_name":"Nicholas H"},{"last_name":"Hewitt","first_name":"Godfrey","full_name":"Hewitt, Godfrey"}]},{"date_updated":"2021-12-16T08:31:08Z","type":"journal_article","publication":"Heredity","scopus_import":"1","article_processing_charge":"No","article_type":"original","day":"01","extern":"1","oa":1,"volume":47,"title":"The genetic basis of hybrid inviability between two chromosomal races of the grasshopper Podisma pedestris","year":"1981","language":[{"iso":"eng"}],"publist_id":"1703","abstract":[{"lang":"eng","text":"Samples were taken from five sites in a transect across the hybrid zone between two chromosomal races of the grasshopper Podisma pedestris. Crosses were set up between insects from the same population, and between populations spanning the zone, and the early viability of the offspring was measured. Hybrids between pure populations had reduced viability, and the viability of insects from the middle of the zone was still lower, showing that most (87 per cent) of the inviability was due to the breakup of coadapated gene complexes. Although the total selection acting was strong (log. fitness reduced by S25), it was spread over a region wider than the dispersal range (350 m vs. 20 m). Hence, the selection on each locus contributing towards the inviability is weak (3 per cent). Many (150) independent chromosome segments act cumulatively to produce inviability at this stage in the life history. The implications of these findings for models of divergence are discussed."}],"main_file_link":[{"url":"https://www.nature.com/articles/hdy198198","open_access":"1"}],"doi":"10.1038/hdy.1981.98","publication_status":"published","quality_controlled":"1","date_published":"1981-12-01T00:00:00Z","publication_identifier":{"eissn":["1365-2540"],"issn":["0018-067X"]},"intvolume":"        47","issue":"3","_id":"4333","date_created":"2018-12-11T12:08:18Z","publisher":"Springer Nature","citation":{"ieee":"N. H. Barton and G. Hewitt, “The genetic basis of hybrid inviability between two chromosomal races of the grasshopper Podisma pedestris,” <i>Heredity</i>, vol. 47, no. 3. Springer Nature, pp. 367–383, 1981.","ama":"Barton NH, Hewitt G. The genetic basis of hybrid inviability between two chromosomal races of the grasshopper Podisma pedestris. <i>Heredity</i>. 1981;47(3):367-383. doi:<a href=\"https://doi.org/10.1038/hdy.1981.98\">10.1038/hdy.1981.98</a>","apa":"Barton, N. H., &#38; Hewitt, G. (1981). The genetic basis of hybrid inviability between two chromosomal races of the grasshopper Podisma pedestris. <i>Heredity</i>. Springer Nature. <a href=\"https://doi.org/10.1038/hdy.1981.98\">https://doi.org/10.1038/hdy.1981.98</a>","ista":"Barton NH, Hewitt G. 1981. The genetic basis of hybrid inviability between two chromosomal races of the grasshopper Podisma pedestris. Heredity. 47(3), 367–383.","short":"N.H. Barton, G. Hewitt, Heredity 47 (1981) 367–383.","mla":"Barton, Nicholas H., and Godfrey Hewitt. “The Genetic Basis of Hybrid Inviability between Two Chromosomal Races of the Grasshopper Podisma Pedestris.” <i>Heredity</i>, vol. 47, no. 3, Springer Nature, 1981, pp. 367–83, doi:<a href=\"https://doi.org/10.1038/hdy.1981.98\">10.1038/hdy.1981.98</a>.","chicago":"Barton, Nicholas H, and Godfrey Hewitt. “The Genetic Basis of Hybrid Inviability between Two Chromosomal Races of the Grasshopper Podisma Pedestris.” <i>Heredity</i>. Springer Nature, 1981. <a href=\"https://doi.org/10.1038/hdy.1981.98\">https://doi.org/10.1038/hdy.1981.98</a>."},"status":"public","month":"12","page":"367 - 383","author":[{"last_name":"Barton","first_name":"Nicholas H","id":"4880FE40-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-8548-5240","full_name":"Barton, Nicholas H"},{"full_name":"Hewitt, Godfrey","last_name":"Hewitt","first_name":"Godfrey"}],"oa_version":"Published Version","user_id":"8b945eb4-e2f2-11eb-945a-df72226e66a9"},{"extern":"1","oa":1,"OA_type":"hybrid","day":"01","year":"1980","title":"The hybrid sink effect","volume":44,"publist_id":"2711","language":[{"iso":"eng"}],"main_file_link":[{"open_access":"1","url":"https://www.nature.com/articles/hdy198023"}],"doi":"10.1038/hdy.1980.23","publication_status":"published","type":"journal_article","publication":"Heredity","date_updated":"2024-10-16T14:36:57Z","scopus_import":"1","article_processing_charge":"No","article_type":"letter_note","acknowledgement":"This work was supported by a grant from the Natural Environment Research Council.","OA_place":"publisher","author":[{"id":"4880FE40-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-8548-5240","full_name":"Barton, Nicholas H","first_name":"Nicholas H","last_name":"Barton"}],"user_id":"0043cee0-e5fc-11ee-9736-f83bc23afbf0","oa_version":"Published Version","quality_controlled":"1","date_published":"1980-04-01T00:00:00Z","_id":"3672","intvolume":"        44","publication_identifier":{"eissn":["1365-2540"],"issn":["0018-067X"]},"date_created":"2018-12-11T12:04:33Z","citation":{"ista":"Barton NH. 1980. The hybrid sink effect. Heredity. 44, 277–278.","mla":"Barton, Nicholas H. “The Hybrid Sink Effect.” <i>Heredity</i>, vol. 44, Springer Nature, 1980, pp. 277–78, doi:<a href=\"https://doi.org/10.1038/hdy.1980.23\">10.1038/hdy.1980.23</a>.","short":"N.H. Barton, Heredity 44 (1980) 277–278.","chicago":"Barton, Nicholas H. “The Hybrid Sink Effect.” <i>Heredity</i>. Springer Nature, 1980. <a href=\"https://doi.org/10.1038/hdy.1980.23\">https://doi.org/10.1038/hdy.1980.23</a>.","ama":"Barton NH. The hybrid sink effect. <i>Heredity</i>. 1980;44:277-278. doi:<a href=\"https://doi.org/10.1038/hdy.1980.23\">10.1038/hdy.1980.23</a>","apa":"Barton, N. H. (1980). The hybrid sink effect. <i>Heredity</i>. Springer Nature. <a href=\"https://doi.org/10.1038/hdy.1980.23\">https://doi.org/10.1038/hdy.1980.23</a>","ieee":"N. H. Barton, “The hybrid sink effect,” <i>Heredity</i>, vol. 44. Springer Nature, pp. 277–278, 1980."},"publisher":"Springer Nature","month":"04","status":"public","page":"277 - 278"},{"oa_version":"None","user_id":"8b945eb4-e2f2-11eb-945a-df72226e66a9","publication_status":"published","author":[{"last_name":"Hewitt","first_name":"Godfrey","full_name":"Hewitt, Godfrey"},{"full_name":"Barton, Nicholas H","orcid":"0000-0002-8548-5240","id":"4880FE40-F248-11E8-B48F-1D18A9856A87","last_name":"Barton","first_name":"Nicholas H"}],"language":[{"iso":"eng"}],"publist_id":"1699","day":"01","extern":"1","volume":10,"title":"The structure and maintenance of hybrid zones as exemplified by Podisma pedestris","alternative_title":["Symposia of the Royal Entomological Society"],"year":"1980","status":"public","editor":[{"full_name":"Blackman, Roger","last_name":"Blackman","first_name":"Roger"},{"full_name":"Ashburner, Michael","last_name":"Ashburner","first_name":"Michael"}],"article_processing_charge":"No","month":"01","page":"149 - 170","date_created":"2018-12-11T12:08:19Z","publisher":"Wiley-Blackwell","citation":{"chicago":"Hewitt, Godfrey, and Nicholas H Barton. “The Structure and Maintenance of Hybrid Zones as Exemplified by Podisma Pedestris.” In <i>Insect Cytogenetics</i>, edited by Roger Blackman and Michael Ashburner, 10:149–70. Wiley-Blackwell, 1980.","mla":"Hewitt, Godfrey, and Nicholas H. Barton. “The Structure and Maintenance of Hybrid Zones as Exemplified by Podisma Pedestris.” <i>Insect Cytogenetics</i>, edited by Roger Blackman and Michael Ashburner, vol. 10, Wiley-Blackwell, 1980, pp. 149–70.","short":"G. Hewitt, N.H. Barton, in:, R. Blackman, M. Ashburner (Eds.), Insect Cytogenetics, Wiley-Blackwell, 1980, pp. 149–170.","ista":"Hewitt G, Barton NH. 1980.The structure and maintenance of hybrid zones as exemplified by Podisma pedestris. In: Insect Cytogenetics. Symposia of the Royal Entomological Society, vol. 10, 149–170.","apa":"Hewitt, G., &#38; Barton, N. H. (1980). The structure and maintenance of hybrid zones as exemplified by Podisma pedestris. In R. Blackman &#38; M. Ashburner (Eds.), <i>Insect Cytogenetics</i> (Vol. 10, pp. 149–170). Wiley-Blackwell.","ieee":"G. Hewitt and N. H. Barton, “The structure and maintenance of hybrid zones as exemplified by Podisma pedestris,” in <i>Insect Cytogenetics</i>, vol. 10, R. Blackman and M. Ashburner, Eds. Wiley-Blackwell, 1980, pp. 149–170.","ama":"Hewitt G, Barton NH. The structure and maintenance of hybrid zones as exemplified by Podisma pedestris. In: Blackman R, Ashburner M, eds. <i>Insect Cytogenetics</i>. Vol 10. Wiley-Blackwell; 1980:149-170."},"publication_identifier":{"isbn":["9-780-6320-0552-9"]},"intvolume":"        10","_id":"4334","date_updated":"2021-12-15T16:09:43Z","quality_controlled":"1","type":"book_chapter","publication":"Insect Cytogenetics","date_published":"1980-01-01T00:00:00Z"},{"month":"08","status":"public","page":"47 - 59","date_created":"2018-12-11T12:08:19Z","citation":{"chicago":"Barton, Nicholas H. “The Fitness of Hybrids between Two Chromosomal Races of the Grasshopper Podisma Pedestris.” <i>Heredity</i>. Springer Nature, 1980. <a href=\"https://doi.org/10.1038/hdy.1980.49\">https://doi.org/10.1038/hdy.1980.49</a>.","ista":"Barton NH. 1980. The fitness of hybrids between two chromosomal races of the grasshopper Podisma pedestris. Heredity. 45, 47–59.","mla":"Barton, Nicholas H. “The Fitness of Hybrids between Two Chromosomal Races of the Grasshopper Podisma Pedestris.” <i>Heredity</i>, vol. 45, Springer Nature, 1980, pp. 47–59, doi:<a href=\"https://doi.org/10.1038/hdy.1980.49\">10.1038/hdy.1980.49</a>.","short":"N.H. Barton, Heredity 45 (1980) 47–59.","ieee":"N. H. Barton, “The fitness of hybrids between two chromosomal races of the grasshopper Podisma pedestris,” <i>Heredity</i>, vol. 45. Springer Nature, pp. 47–59, 1980.","apa":"Barton, N. H. (1980). The fitness of hybrids between two chromosomal races of the grasshopper Podisma pedestris. <i>Heredity</i>. Springer Nature. <a href=\"https://doi.org/10.1038/hdy.1980.49\">https://doi.org/10.1038/hdy.1980.49</a>","ama":"Barton NH. The fitness of hybrids between two chromosomal races of the grasshopper Podisma pedestris. <i>Heredity</i>. 1980;45:47-59. doi:<a href=\"https://doi.org/10.1038/hdy.1980.49\">10.1038/hdy.1980.49</a>"},"publisher":"Springer Nature","_id":"4335","publication_identifier":{"eissn":["1365-2540"],"issn":["0018-067X"]},"intvolume":"        45","quality_controlled":"1","date_published":"1980-08-01T00:00:00Z","user_id":"0043cee0-e5fc-11ee-9736-f83bc23afbf0","oa_version":"Published Version","OA_place":"publisher","author":[{"full_name":"Barton, Nicholas H","orcid":"0000-0002-8548-5240","id":"4880FE40-F248-11E8-B48F-1D18A9856A87","last_name":"Barton","first_name":"Nicholas H"}],"acknowledgement":"I would like to thank Dr G. M. Hewitt, and M. W. Shaw, for their help in collecting these samples, Mrs T. M. East for her help in rearing them, and M et Mme Aviotti for their hospitality in France. This work was supported by a N.E.R.C. studentship, and by an S.R.C. grant to Dr G. M. Hewitt.","article_processing_charge":"No","article_type":"original","scopus_import":"1","publication":"Heredity","type":"journal_article","date_updated":"2024-10-16T14:38:31Z","doi":"10.1038/hdy.1980.49","publication_status":"published","main_file_link":[{"url":"https://www.nature.com/articles/hdy198049","open_access":"1"}],"publist_id":"1697","language":[{"iso":"eng"}],"abstract":[{"text":"Genetic incompatibilities between two races of the grasshopper Podisma pedestris, which differ by a Robertsonian fusion involving the sex chromosome, have been investigated. Crosses were made between four populations spanning the chromosomal cline; F1 hybrids between the races, though not between separated populations of the same race, showed markedly reduced hatching success. Observations of the fate of chromosomes transplanted across the cline supported this finding. Crosses between grasshoppers from a mixed population in the cline showed a lower average hatching success, but no correlation of this inviability with the chromosomal polymorphism. The karyotypes of pre-diapause embryos from both types of cross gave no evidence for non-disjunction of the sex chromosome trivalent in heterozygous females; an upper limit of 16 per cent can be set on the non-disjunction rate. These findings suggest that the karyotypic difference is only a weakly selected marker for more fundamental changes in genotype.","lang":"eng"}],"oa":1,"extern":"1","OA_type":"hybrid","day":"01","year":"1980","title":"The fitness of hybrids between two chromosomal races of the grasshopper Podisma pedestris","volume":45},{"quality_controlled":"1","date_published":"1979-12-01T00:00:00Z","issue":"3","intvolume":"        43","publication_identifier":{"eissn":["1365-2540"],"issn":["0018-067X"]},"_id":"3673","date_created":"2018-12-11T12:04:33Z","citation":{"apa":"Barton, N. H. (1979). Gene flow past a cline. <i>Heredity</i>. Springer Nature. <a href=\"https://doi.org/10.1038/hdy.1979.86\">https://doi.org/10.1038/hdy.1979.86</a>","ama":"Barton NH. Gene flow past a cline. <i>Heredity</i>. 1979;43(3):333-339. doi:<a href=\"https://doi.org/10.1038/hdy.1979.86\">10.1038/hdy.1979.86</a>","ieee":"N. H. Barton, “Gene flow past a cline,” <i>Heredity</i>, vol. 43, no. 3. Springer Nature, pp. 333–339, 1979.","chicago":"Barton, Nicholas H. “Gene Flow Past a Cline.” <i>Heredity</i>. Springer Nature, 1979. <a href=\"https://doi.org/10.1038/hdy.1979.86\">https://doi.org/10.1038/hdy.1979.86</a>.","ista":"Barton NH. 1979. Gene flow past a cline. Heredity. 43(3), 333–339.","short":"N.H. Barton, Heredity 43 (1979) 333–339.","mla":"Barton, Nicholas H. “Gene Flow Past a Cline.” <i>Heredity</i>, vol. 43, no. 3, Springer Nature, 1979, pp. 333–39, doi:<a href=\"https://doi.org/10.1038/hdy.1979.86\">10.1038/hdy.1979.86</a>."},"publisher":"Springer Nature","status":"public","month":"12","page":"333 - 339","acknowledgement":"I would like to thank Dr G. M. Hewitt for stimulating discussions, and for his comments on the manuscript. This work was supported by the Natural Environmental Research Council.\r\n","author":[{"id":"4880FE40-F248-11E8-B48F-1D18A9856A87","full_name":"Barton, Nicholas H","orcid":"0000-0002-8548-5240","last_name":"Barton","first_name":"Nicholas H"}],"oa_version":"Published Version","user_id":"8b945eb4-e2f2-11eb-945a-df72226e66a9","date_updated":"2021-12-15T15:16:50Z","type":"journal_article","publication":"Heredity","scopus_import":"1","article_processing_charge":"No","article_type":"original","day":"01","extern":"1","oa":1,"title":"Gene flow past a cline","volume":43,"year":"1979","language":[{"iso":"eng"}],"publist_id":"2710","abstract":[{"lang":"eng","text":"The effect of a cline as a barrier to gene flow at closely linked, weakly selected loci is investigated using a continuous diffusion model. It is shown that a linked cline induces a step in the frequency of a neutral allele, which is proportional to the gradient in neutral allele frequency and to the inverse of the recombination rate. A barrier to dispersal or a local region of low abundance has a similar effect (Nagylaki, 1976). The cline will block the flow of neutral alleles over a region of chromosome roughly 2s/t map units long. However, a slightly advantageous allele will be little affected, and must be very tightly linked to be delayed for long."}],"main_file_link":[{"url":"https://www.nature.com/articles/hdy197986","open_access":"1"}],"doi":"10.1038/hdy.1979.86","publication_status":"published"},{"publication":"Heredity","type":"journal_article","date_updated":"2024-10-16T14:33:08Z","article_processing_charge":"No","article_type":"original","publist_id":"1696","language":[{"iso":"eng"}],"abstract":[{"lang":"eng","text":"This paper investigates the dynamic behaviour of hybrid zones which are maintained by a balance between dispersal and selection against hybrids. In the first section it is shown that a hybrid zone involving a single locus can move in response to a selective imbalance between the two homozygotes, and also to variation in population density and dispersal rate. It can be trapped by natural barriers, and so an allele which is selected against when rare cannot advance, even if it is advantageous when common. The continuous model used in deriving these results is shown to be a good approximation to the stepping-stone model, provided that the cline contains several demes.\r\n\r\nThe effect of stochastic forces on multi-locus hybrid zones is then considered. An expression giving the shift in position after an arbitrary perturbation in gamete frequency is derived. Using this formula, it is found that sampling drift is negligible unless the zone includes few organisms and involves few loci. Random variations in population structure are the dominant force, and could allow considerable movement in an even environment. However, natural barriers can still trap hybrid zones, and so it is likely that they will remain roughly where they first formed."}],"oa":1,"extern":"1","OA_type":"hybrid","day":"01","year":"1979","volume":43,"title":"The dynamics of hybrid zones","doi":"10.1038/hdy.1979.87","publication_status":"published","main_file_link":[{"url":"https://www.nature.com/articles/hdy197987","open_access":"1"}],"_id":"4336","publication_identifier":{"issn":["0018-067X"],"eissn":["1365-2540"]},"issue":"3","intvolume":"        43","quality_controlled":"1","date_published":"1979-12-01T00:00:00Z","month":"12","status":"public","page":"341 - 359","date_created":"2018-12-11T12:08:19Z","publisher":"Springer Nature","citation":{"apa":"Barton, N. H. (1979). The dynamics of hybrid zones. <i>Heredity</i>. Springer Nature. <a href=\"https://doi.org/10.1038/hdy.1979.87\">https://doi.org/10.1038/hdy.1979.87</a>","ieee":"N. H. Barton, “The dynamics of hybrid zones,” <i>Heredity</i>, vol. 43, no. 3. Springer Nature, pp. 341–359, 1979.","ama":"Barton NH. The dynamics of hybrid zones. <i>Heredity</i>. 1979;43(3):341-359. doi:<a href=\"https://doi.org/10.1038/hdy.1979.87\">10.1038/hdy.1979.87</a>","chicago":"Barton, Nicholas H. “The Dynamics of Hybrid Zones.” <i>Heredity</i>. Springer Nature, 1979. <a href=\"https://doi.org/10.1038/hdy.1979.87\">https://doi.org/10.1038/hdy.1979.87</a>.","short":"N.H. Barton, Heredity 43 (1979) 341–359.","mla":"Barton, Nicholas H. “The Dynamics of Hybrid Zones.” <i>Heredity</i>, vol. 43, no. 3, Springer Nature, 1979, pp. 341–59, doi:<a href=\"https://doi.org/10.1038/hdy.1979.87\">10.1038/hdy.1979.87</a>.","ista":"Barton NH. 1979. The dynamics of hybrid zones. Heredity. 43(3), 341–359."},"user_id":"0043cee0-e5fc-11ee-9736-f83bc23afbf0","oa_version":"Published Version","OA_place":"publisher","author":[{"id":"4880FE40-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-8548-5240","full_name":"Barton, Nicholas H","first_name":"Nicholas H","last_name":"Barton"}]},{"month":"01","article_processing_charge":"No","status":"public","publisher":"University of East Anglia","citation":{"ista":"Barton NH. 1979. A hybrid zone in the alpine grasshopper Podisma pedestris. University of East Anglia.","short":"N.H. Barton, A Hybrid Zone in the Alpine Grasshopper Podisma Pedestris, University of East Anglia, 1979.","mla":"Barton, Nicholas H. <i>A Hybrid Zone in the Alpine Grasshopper Podisma Pedestris</i>. University of East Anglia, 1979.","chicago":"Barton, Nicholas H. “A Hybrid Zone in the Alpine Grasshopper Podisma Pedestris.” University of East Anglia, 1979.","apa":"Barton, N. H. (1979). <i>A hybrid zone in the alpine grasshopper Podisma pedestris</i>. University of East Anglia.","ama":"Barton NH. A hybrid zone in the alpine grasshopper Podisma pedestris. 1979.","ieee":"N. H. Barton, “A hybrid zone in the alpine grasshopper Podisma pedestris,” University of East Anglia, 1979."},"date_created":"2018-12-11T12:08:20Z","degree_awarded":"PhD","_id":"4337","date_published":"1979-01-01T00:00:00Z","type":"dissertation","date_updated":"2025-06-26T08:57:22Z","publication_status":"published","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","oa_version":"None","author":[{"id":"4880FE40-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-8548-5240","full_name":"Barton, Nicholas H","last_name":"Barton","first_name":"Nicholas H"}],"publist_id":"1694","language":[{"iso":"eng"}],"year":"1979","title":"A hybrid zone in the alpine grasshopper Podisma pedestris","extern":"1","day":"01"}]