The genetic architecture of male colour differences between a sympatric Lake Malawi cichlid species pair
The genetic basis of traits involved in reproductive isolation is a key parameter in models of sympatric speciation by sexual selection, a potential mechanism driving the explosive radiation of East African cichlids. Analysis of hybrid crosses between two sympatric Lake Malawi cichlid species, repre...
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| Veröffentlicht in: | Journal of evolutionary biology 2007-01, Vol.20 (1), p.45-53 |
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| creator | BARSON, N. J. KNIGHT, M. E. TURNER, G. F. |
| description | The genetic basis of traits involved in reproductive isolation is a key parameter in models of sympatric speciation by sexual selection, a potential mechanism driving the explosive radiation of East African cichlids. Analysis of hybrid crosses between two sympatric Lake Malawi cichlid species, representing the extremes of the extant colour distribution, generated Castle–Wright estimates of four to seven loci controlling colour differences. Segregation patterns deviated from a purely additive model with a significant contribution from dominance, and possibly also epistasis. Evidence was found for a strong influence of autosomal loci. As departures from simple additive variation could effect the operation of models of sympatric speciation, dominance and epistasis should not be neglected. |
| doi_str_mv | 10.1111/j.1420-9101.2006.01228.x |
| format | Article |
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J.</creatorcontrib><creatorcontrib>KNIGHT, M. E.</creatorcontrib><creatorcontrib>TURNER, G. F.</creatorcontrib><title>The genetic architecture of male colour differences between a sympatric Lake Malawi cichlid species pair</title><title>Journal of evolutionary biology</title><addtitle>J Evol Biol</addtitle><description>The genetic basis of traits involved in reproductive isolation is a key parameter in models of sympatric speciation by sexual selection, a potential mechanism driving the explosive radiation of East African cichlids. Analysis of hybrid crosses between two sympatric Lake Malawi cichlid species, representing the extremes of the extant colour distribution, generated Castle–Wright estimates of four to seven loci controlling colour differences. Segregation patterns deviated from a purely additive model with a significant contribution from dominance, and possibly also epistasis. Evidence was found for a strong influence of autosomal loci. As departures from simple additive variation could effect the operation of models of sympatric speciation, dominance and epistasis should not be neglected.</description><subject>Animal reproduction</subject><subject>Animals</subject><subject>Castle–Wright estimator</subject><subject>cichlid fish</subject><subject>Cichlidae</subject><subject>Cichlids - genetics</subject><subject>Cichlids - physiology</subject><subject>Color</subject><subject>Epistasis, Genetic</subject><subject>Evolutionary biology</subject><subject>Fish</subject><subject>Fresh Water</subject><subject>Freshwater</subject><subject>Genetic Linkage</subject><subject>Genetic Speciation</subject><subject>Genetics</subject><subject>Hybridization, Genetic</subject><subject>Inheritance Patterns - genetics</subject><subject>Malawi</subject><subject>Male</subject><subject>male colour genes</subject><subject>Models, Genetic</subject><subject>Phenotype</subject><subject>Pigmentation - genetics</subject><subject>Pigmentation - physiology</subject><subject>Quantitative Trait Loci - genetics</subject><subject>sexual selection</subject><subject>speciation</subject><subject>Species Specificity</subject><issn>1010-061X</issn><issn>1420-9101</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqNkU2P0zAQhiMEYpeFv4AsDtwSZlw7tg8cYLXLh4q4LBI3y3Um1CVNgp2o23-PQyuQuIAvHsnP-0rjpygYQoX5vNpVKDiUBgErDlBXgJzr6v5Bcfn74WGeAaGEGr9eFE9S2gFgLaR8XFyg4mCM0ZfF9m5L7Bv1NAXPXPTbMJGf5khsaNnedcT80A1zZE1oW4rUe0psQ9OBqGeOpeN-dFPM2bX7TuyT69whMB_8tgsNSyP5kPnRhfi0eNS6LtGz831VfLm9ubt-X64_v_tw_WZdeqGkLrVDyR1sPEjuG4ANKtCuaZ10qGqxIi1ayTUaozQ3tQYhW3BOkHRcaQWrq-LlqXeMw4-Z0mT3IXnqOtfTMCdba4GoUP0TRCNriQYz-OIvcJc_pM9LWA5KiNqAyZA-QT4OKUVq7RjD3sWjRbCLM7uzixq7qLGLM_vLmb3P0efn_nmzp-ZP8CwpA69PwCF0dPzvYvvx5u0yrX4CMMijuQ</recordid><startdate>200701</startdate><enddate>200701</enddate><creator>BARSON, N. 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F.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4758-8a152a0bc052cd00b1708adfa5a17643e84f528199782968045f0aa4e5a278703</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2007</creationdate><topic>Animal reproduction</topic><topic>Animals</topic><topic>Castle–Wright estimator</topic><topic>cichlid fish</topic><topic>Cichlidae</topic><topic>Cichlids - genetics</topic><topic>Cichlids - physiology</topic><topic>Color</topic><topic>Epistasis, Genetic</topic><topic>Evolutionary biology</topic><topic>Fish</topic><topic>Fresh Water</topic><topic>Freshwater</topic><topic>Genetic Linkage</topic><topic>Genetic Speciation</topic><topic>Genetics</topic><topic>Hybridization, Genetic</topic><topic>Inheritance Patterns - genetics</topic><topic>Malawi</topic><topic>Male</topic><topic>male colour genes</topic><topic>Models, Genetic</topic><topic>Phenotype</topic><topic>Pigmentation - genetics</topic><topic>Pigmentation - physiology</topic><topic>Quantitative Trait Loci - genetics</topic><topic>sexual selection</topic><topic>speciation</topic><topic>Species Specificity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>BARSON, N. 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J.</au><au>KNIGHT, M. E.</au><au>TURNER, G. F.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The genetic architecture of male colour differences between a sympatric Lake Malawi cichlid species pair</atitle><jtitle>Journal of evolutionary biology</jtitle><addtitle>J Evol Biol</addtitle><date>2007-01</date><risdate>2007</risdate><volume>20</volume><issue>1</issue><spage>45</spage><epage>53</epage><pages>45-53</pages><issn>1010-061X</issn><eissn>1420-9101</eissn><abstract>The genetic basis of traits involved in reproductive isolation is a key parameter in models of sympatric speciation by sexual selection, a potential mechanism driving the explosive radiation of East African cichlids. Analysis of hybrid crosses between two sympatric Lake Malawi cichlid species, representing the extremes of the extant colour distribution, generated Castle–Wright estimates of four to seven loci controlling colour differences. 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| source | Oxford University Press Journals All Titles (1996-Current); MEDLINE; Wiley Online Library Journals Frontfile Complete; EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection |
| subjects | Animal reproduction Animals Castle–Wright estimator cichlid fish Cichlidae Cichlids - genetics Cichlids - physiology Color Epistasis, Genetic Evolutionary biology Fish Fresh Water Freshwater Genetic Linkage Genetic Speciation Genetics Hybridization, Genetic Inheritance Patterns - genetics Malawi Male male colour genes Models, Genetic Phenotype Pigmentation - genetics Pigmentation - physiology Quantitative Trait Loci - genetics sexual selection speciation Species Specificity |
| title | The genetic architecture of male colour differences between a sympatric Lake Malawi cichlid species pair |
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