Geographic pattern of genetic variation in modiolus capax (conrad, 1837) from the gulf of california
The genetic variation of the two largest Modiolus capax (Conrad, 1837) populations that occur on the west coast of the Gulf of California was studied by the allozyme analysis of eight polymorphisms of twelve isozyme loci. Genetic variation was examined in about 200 mussels collected from three lev...
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| Format: | Article |
| Language: | English |
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Universidad Autónoma de Baja California
2000-03-01
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| Series: | Ciencias Marinas |
| Subjects: | |
| Online Access: | https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/620 |
| _version_ | 1797279304703279104 |
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| author | J Rosa-Vélez C Farfán MA Cervantes-Franco |
| author_facet | J Rosa-Vélez C Farfán MA Cervantes-Franco |
| author_sort | J Rosa-Vélez |
| collection | DOAJ |
| description |
The genetic variation of the two largest Modiolus capax (Conrad, 1837) populations that occur on the west coast of the Gulf of California was studied by the allozyme analysis of eight polymorphisms of twelve isozyme loci. Genetic variation was examined in about 200 mussels collected from three levels of the intertidal zone and from three sublittoral demes. Two loci (LAP* and GPI*) displayed particularly high allelic diversity (18 and 19 alleles, respectively), many of which were rare (p < 0.1). Heterozygote deficiency was a common feature across all loci, probably explained by the Wahlund effect. The genetic structure of the population was analyzed using Wright's F-statistics, and its significance was assessed by permutation and numerical resampling methods. There was a lower degree of genetic divergence among intertidal levels (FST = 0.042) than among sublittoral demes (FST = 0.080), yet both values were significant. Comparisions between grouped genotype frequencies for each extreme locality (San Felipe vs La Paz) revealed a low but significant level of genetic divergence (FST = 0.049), which suggests genetic flow over vast geographic distances (approximately 1100 km), but slight local genetic divergence due to physical or biological factors acting over the larval dispersal and settlement.
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| first_indexed | 2024-03-07T16:23:21Z |
| format | Article |
| id | doaj.art-1a4163e62a50480bbe32b61c42ca9ba0 |
| institution | Directory Open Access Journal |
| issn | 0185-3880 2395-9053 |
| language | English |
| last_indexed | 2024-03-07T16:23:21Z |
| publishDate | 2000-03-01 |
| publisher | Universidad Autónoma de Baja California |
| record_format | Article |
| series | Ciencias Marinas |
| spelling | doaj.art-1a4163e62a50480bbe32b61c42ca9ba02024-03-03T19:38:27ZengUniversidad Autónoma de Baja CaliforniaCiencias Marinas0185-38802395-90532000-03-0126410.7773/cm.v26i4.620Geographic pattern of genetic variation in modiolus capax (conrad, 1837) from the gulf of californiaJ Rosa-Vélez0C Farfán1MA Cervantes-Franco2Universidad Autónoma de Baja CaliforniaCentro de Investigación Científica y de Educación Superior de EnsenadaCentro de Investigación Científica y de Educación Superior de Ensenada The genetic variation of the two largest Modiolus capax (Conrad, 1837) populations that occur on the west coast of the Gulf of California was studied by the allozyme analysis of eight polymorphisms of twelve isozyme loci. Genetic variation was examined in about 200 mussels collected from three levels of the intertidal zone and from three sublittoral demes. Two loci (LAP* and GPI*) displayed particularly high allelic diversity (18 and 19 alleles, respectively), many of which were rare (p < 0.1). Heterozygote deficiency was a common feature across all loci, probably explained by the Wahlund effect. The genetic structure of the population was analyzed using Wright's F-statistics, and its significance was assessed by permutation and numerical resampling methods. There was a lower degree of genetic divergence among intertidal levels (FST = 0.042) than among sublittoral demes (FST = 0.080), yet both values were significant. Comparisions between grouped genotype frequencies for each extreme locality (San Felipe vs La Paz) revealed a low but significant level of genetic divergence (FST = 0.049), which suggests genetic flow over vast geographic distances (approximately 1100 km), but slight local genetic divergence due to physical or biological factors acting over the larval dispersal and settlement. https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/620Modiolus capaxmytilidsallozyme variationgenetic divergence |
| spellingShingle | J Rosa-Vélez C Farfán MA Cervantes-Franco Geographic pattern of genetic variation in modiolus capax (conrad, 1837) from the gulf of california Ciencias Marinas Modiolus capax mytilids allozyme variation genetic divergence |
| title | Geographic pattern of genetic variation in modiolus capax (conrad, 1837) from the gulf of california |
| title_full | Geographic pattern of genetic variation in modiolus capax (conrad, 1837) from the gulf of california |
| title_fullStr | Geographic pattern of genetic variation in modiolus capax (conrad, 1837) from the gulf of california |
| title_full_unstemmed | Geographic pattern of genetic variation in modiolus capax (conrad, 1837) from the gulf of california |
| title_short | Geographic pattern of genetic variation in modiolus capax (conrad, 1837) from the gulf of california |
| title_sort | geographic pattern of genetic variation in modiolus capax conrad 1837 from the gulf of california |
| topic | Modiolus capax mytilids allozyme variation genetic divergence |
| url | https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/620 |
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