[{"main_file_link":[{"url":"http://www.jstor.org/stable/2407871"}],"status":"public","user_id":"ea97e931-d5af-11eb-85d4-e6957dddbf17","type":"journal_article","date_published":"1981-09-01T00:00:00Z","publication_identifier":{"eissn":["1558-5646"],"issn":["0014-3820"]},"publist_id":"2713","language":[{"iso":"eng"}],"publication":"Evolution; International Journal of Organic Evolution","oa_version":"None","month":"09","volume":35,"acknowledgement":"Many thanks are due to the Hewitt  family (Elizabeth, Daniel, Matthew, and James), Bruce and Helen Halliday, Mike\r\n Shaw, Alan Jenyon, and Bob Williams for their help in collecting the grasshoppers;  to M. and Mme. Aviotti for their hospitality in Casterino; and to Marise East for her help in karyotyping the samples. The work was supported by a grant from the S.R.C. to G. Hewitt, and N. Barton was supported by a N.E.R.C. studentship.","extern":"1","year":"1981","citation":{"ista":"Barton NH, Hewitt G. 1981. A chromosomal cline in the grasshopper Podisma pedestris. Evolution; International Journal of Organic Evolution. 35(5), 1008–1018.","short":"N.H. Barton, G. Hewitt, Evolution; International Journal of Organic Evolution 35 (1981) 1008–1018.","mla":"Barton, Nicholas H., and Godfrey Hewitt. “A Chromosomal Cline in the Grasshopper Podisma Pedestris.” <i>Evolution; International Journal of Organic Evolution</i>, vol. 35, no. 5, Wiley-Blackwell, 1981, pp. 1008–18, doi:<a href=\"https://doi.org/ 10.1111/j.1558-5646.1981.tb04966.x\"> 10.1111/j.1558-5646.1981.tb04966.x</a>.","chicago":"Barton, Nicholas H, and Godfrey Hewitt. “A Chromosomal Cline in the Grasshopper Podisma Pedestris.” <i>Evolution; International Journal of Organic Evolution</i>. Wiley-Blackwell, 1981. <a href=\"https://doi.org/ 10.1111/j.1558-5646.1981.tb04966.x\">https://doi.org/ 10.1111/j.1558-5646.1981.tb04966.x</a>.","ieee":"N. H. Barton and G. Hewitt, “A chromosomal cline in the grasshopper Podisma pedestris,” <i>Evolution; International Journal of Organic Evolution</i>, vol. 35, no. 5. Wiley-Blackwell, pp. 1008–1018, 1981.","apa":"Barton, N. H., &#38; Hewitt, G. (1981). A chromosomal cline in the grasshopper Podisma pedestris. <i>Evolution; International Journal of Organic Evolution</i>. Wiley-Blackwell. <a href=\"https://doi.org/ 10.1111/j.1558-5646.1981.tb04966.x\">https://doi.org/ 10.1111/j.1558-5646.1981.tb04966.x</a>","ama":"Barton NH, Hewitt G. A chromosomal cline in the grasshopper Podisma pedestris. <i>Evolution; International Journal of Organic Evolution</i>. 1981;35(5):1008-1018. doi:<a href=\"https://doi.org/ 10.1111/j.1558-5646.1981.tb04966.x\"> 10.1111/j.1558-5646.1981.tb04966.x</a>"},"date_updated":"2022-01-21T08:51:51Z","external_id":{"pmid":["28581059"]},"day":"01","doi":" 10.1111/j.1558-5646.1981.tb04966.x","abstract":[{"text":"The grasshopper Podisma pedestris includes two chromosomal races, which differ by a Robertsonian fusion involving the sex chromosome. The two races meet in a cline which runs for 100 km across the Alpes Maritimes in south-eastern France. An intensive study of the easternmost end of this cline shows that it is about 800 m wide; the cline is not smooth, containing substantial spikes in chromosome frequency which might be due to sampling drift. Though the cline seems narrow, it is wide compared with the dispersal rate of the insect; a selective force of only 0.5% would be enough to maintain the cline. It is difficult to determine the nature of this force, but some evidence comes from the position of the cline, and from the presence of coincident clines at other loci. An estimate of the distribution of Podisma has been made, and the cline seems to follow, for the most part, a region of low population density, suggesting that it is maintained by hybrid unfitness. However, in the one region where the cline is relatively free to move, the XY race bulges forwards more than would be expected if hybrids are unfit. The observation of severe inviability in crosses between the races, though it is not associated with the chromosomal difference, also indicates that this cline is the result of some sort of genetic incompatibility.","lang":"eng"}],"quality_controlled":"1","page":"1008 - 1018","publisher":"Wiley-Blackwell","article_type":"original","pmid":1,"_id":"3670","issue":"5","author":[{"last_name":"Barton","first_name":"Nicholas H","full_name":"Barton, Nicholas H","orcid":"0000-0002-8548-5240","id":"4880FE40-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Hewitt","first_name":"Godfrey","full_name":"Hewitt, Godfrey"}],"article_processing_charge":"No","date_created":"2018-12-11T12:04:32Z","publication_status":"published","intvolume":"        35","title":"A chromosomal cline in the grasshopper Podisma pedestris"},{"publication_identifier":{"eissn":["1365-2540"],"issn":["0018-067X"]},"oa":1,"publist_id":"2712","date_published":"1981-10-01T00:00:00Z","type":"journal_article","main_file_link":[{"open_access":"1","url":"https://www.nature.com/articles/hdy198186"}],"status":"public","user_id":"ea97e931-d5af-11eb-85d4-e6957dddbf17","oa_version":"Published Version","month":"10","publication":"Heredity","language":[{"iso":"eng"}],"doi":"10.1038/hdy.1981.86","day":"01","date_updated":"2022-01-21T08:42:28Z","year":"1981","citation":{"ama":"Barton NH. The width of the hybrid zone in Caledia captiva. <i>Heredity</i>. 1981;47:279-282. doi:<a href=\"https://doi.org/10.1038/hdy.1981.86\">10.1038/hdy.1981.86</a>","apa":"Barton, N. H. (1981). The width of the hybrid zone in Caledia captiva. <i>Heredity</i>. Nature Publishing Group. <a href=\"https://doi.org/10.1038/hdy.1981.86\">https://doi.org/10.1038/hdy.1981.86</a>","ieee":"N. H. Barton, “The width of the hybrid zone in Caledia captiva,” <i>Heredity</i>, vol. 47. Nature Publishing Group, pp. 279–282, 1981.","chicago":"Barton, Nicholas H. “The Width of the Hybrid Zone in Caledia Captiva.” <i>Heredity</i>. Nature Publishing Group, 1981. <a href=\"https://doi.org/10.1038/hdy.1981.86\">https://doi.org/10.1038/hdy.1981.86</a>.","mla":"Barton, Nicholas H. “The Width of the Hybrid Zone in Caledia Captiva.” <i>Heredity</i>, vol. 47, Nature Publishing Group, 1981, pp. 279–82, doi:<a href=\"https://doi.org/10.1038/hdy.1981.86\">10.1038/hdy.1981.86</a>.","short":"N.H. Barton, Heredity 47 (1981) 279–282.","ista":"Barton NH. 1981. The width of the hybrid zone in Caledia captiva. Heredity. 47, 279–282."},"volume":47,"extern":"1","publication_status":"published","article_processing_charge":"No","date_created":"2018-12-11T12:04:32Z","title":"The width of the hybrid zone in Caledia captiva","intvolume":"        47","_id":"3671","scopus_import":"1","author":[{"id":"4880FE40-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-8548-5240","full_name":"Barton, Nicholas H","first_name":"Nicholas H","last_name":"Barton"}],"publisher":"Nature Publishing Group","article_type":"original","page":"279 - 282","quality_controlled":"1"},{"oa":1,"publist_id":"1988","publication_identifier":{"issn":["0020-0190"]},"date_published":"1981-01-01T00:00:00Z","type":"journal_article","status":"public","user_id":"8b945eb4-e2f2-11eb-945a-df72226e66a9","main_file_link":[{"open_access":"1","url":"https://www.sciencedirect.com/science/article/pii/0020019081900533"}],"month":"01","oa_version":"Published Version","publication":"Information Processing Letters","language":[{"iso":"eng"}],"doi":"10.1016/0020-0190(81)90053-3","day":"01","date_updated":"2021-12-16T08:38:40Z","year":"1981","citation":{"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>.","short":"H. Edelsbrunner, H. Maurer, Information Processing Letters 13 (1981) 177–181.","ista":"Edelsbrunner H, Maurer H. 1981. On the intersection of Orthogonal objects. Information Processing Letters. 13(4–5), 177–181.","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>","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>","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>.","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."},"extern":"1","volume":13,"title":"On the intersection of Orthogonal objects","intvolume":"        13","publication_status":"published","article_processing_charge":"No","date_created":"2018-12-11T12:07:08Z","author":[{"first_name":"Herbert","last_name":"Edelsbrunner","orcid":"0000-0002-9823-6833","full_name":"Edelsbrunner, Herbert","id":"3FB178DA-F248-11E8-B48F-1D18A9856A87"},{"full_name":"Maurer, Hermann","first_name":"Hermann","last_name":"Maurer"}],"issue":"4-5","_id":"4132","scopus_import":"1","article_type":"original","publisher":"Elsevier","page":"177 - 181","quality_controlled":"1"},{"year":"1981","citation":{"ista":"Edelsbrunner H, Maurer H. 1981. A space-optimal solution of general region location. Theoretical Computer Science. 16(3), 329–336.","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>.","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>.","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.","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>","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>"},"date_updated":"2021-12-16T09:03:47Z","day":"01","doi":"10.1016/0304-3975(81)90103-1","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"}],"volume":16,"extern":"1","scopus_import":"1","_id":"4133","issue":"3","author":[{"full_name":"Edelsbrunner, Herbert","orcid":"0000-0002-9823-6833","last_name":"Edelsbrunner","first_name":"Herbert","id":"3FB178DA-F248-11E8-B48F-1D18A9856A87"},{"full_name":"Maurer, Hermann","first_name":"Hermann","last_name":"Maurer"}],"article_processing_charge":"No","date_created":"2018-12-11T12:07:08Z","publication_status":"published","intvolume":"        16","title":"A space-optimal solution of general region location","quality_controlled":"1","page":"329 - 336","publisher":"Elsevier","article_type":"original","type":"journal_article","date_published":"1981-01-01T00:00:00Z","publication_identifier":{"issn":["0304-3975"]},"publist_id":"1989","oa":1,"main_file_link":[{"url":"https://www.sciencedirect.com/science/article/pii/0304397581901031","open_access":"1"}],"status":"public","user_id":"8b945eb4-e2f2-11eb-945a-df72226e66a9","publication":"Theoretical Computer Science","oa_version":"Published Version","month":"01","language":[{"iso":"eng"}]},{"related_material":{"link":[{"relation":"other","url":"https://agris.fao.org/agris-search/search.do?recordID=US201302583227"}]},"user_id":"8b945eb4-e2f2-11eb-945a-df72226e66a9","status":"public","extern":"1","publication_identifier":{"isbn":["9-780-5212-3823-6"]},"day":"29","publist_id":"1702","year":"1981","citation":{"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.","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.","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.","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."},"date_updated":"2021-12-16T08:24:04Z","type":"book_chapter","date_published":"1981-05-29T00:00:00Z","editor":[{"full_name":"Atchley, William","first_name":"William","last_name":"Atchley"},{"full_name":"Woodruff, David","last_name":"Woodruff","first_name":"David"}],"publisher":"Cambridge University Press","quality_controlled":"1","page":"109 - 145","language":[{"iso":"eng"}],"date_created":"2018-12-11T12:08:18Z","article_processing_charge":"No","publication_status":"published","oa_version":"None","month":"05","title":"Hybrid zones and speciation","publication":"Evolution and Speciation","_id":"4332","author":[{"id":"4880FE40-F248-11E8-B48F-1D18A9856A87","last_name":"Barton","first_name":"Nicholas H","full_name":"Barton, Nicholas H","orcid":"0000-0002-8548-5240"},{"full_name":"Hewitt, Godfrey","first_name":"Godfrey","last_name":"Hewitt"}]},{"page":"367 - 383","quality_controlled":"1","publisher":"Springer Nature","article_type":"original","_id":"4333","scopus_import":"1","author":[{"id":"4880FE40-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-8548-5240","full_name":"Barton, Nicholas H","first_name":"Nicholas H","last_name":"Barton"},{"first_name":"Godfrey","last_name":"Hewitt","full_name":"Hewitt, Godfrey"}],"issue":"3","publication_status":"published","date_created":"2018-12-11T12:08:18Z","article_processing_charge":"No","title":"The genetic basis of hybrid inviability between two chromosomal races of the grasshopper Podisma pedestris","intvolume":"        47","volume":47,"extern":"1","date_updated":"2021-12-16T08:31:08Z","citation":{"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>","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.","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>.","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>.","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."},"year":"1981","doi":"10.1038/hdy.1981.98","day":"01","abstract":[{"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.","lang":"eng"}],"language":[{"iso":"eng"}],"publication":"Heredity","oa_version":"Published Version","month":"12","main_file_link":[{"url":"https://www.nature.com/articles/hdy198198","open_access":"1"}],"status":"public","user_id":"8b945eb4-e2f2-11eb-945a-df72226e66a9","date_published":"1981-12-01T00:00:00Z","type":"journal_article","publication_identifier":{"eissn":["1365-2540"],"issn":["0018-067X"]},"publist_id":"1703","oa":1}]