Genetic variability and differentiation in cultured white shrimp Penaeus (Litopenaeus) vannamei with low and high growth
To find a relationship between allozyme heterozygosity and body size in cultured white shrimp, Penaeus (Litopenaeus) vannamei, a sample was taken at the end of an experimental culture; 72 small organisms of 7.1 ± 1.35 g average weights, and 72 large organisms of 17.5 ± 1....
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Iniversidad Autónoma de Baja California
2005
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oai:cienciasmarinas.com.mx:article-702019-04-08T19:38:24Z Genetic variability and differentiation in cultured white shrimp Penaeus (Litopenaeus) vannamei with low and high growth Variabilidad y diferenciación genética en camarón blanco Penaeus (Litopenaeus) vannamei de bajo y alto crecimiento Rivera-García, M Grijalva-Chon, JM White shrimp Penaeus vannamei allozymes genetic variability growth To find a relationship between allozyme heterozygosity and body size in cultured white shrimp, Penaeus (Litopenaeus) vannamei, a sample was taken at the end of an experimental culture; 72 small organisms of 7.1 ± 1.35 g average weights, and 72 large organisms of 17.5 ± 1.34 g average weights. Ten enzymatic systems were analyzed. Eighteen loci showed good resolution for genetic interpretation. Only EST-2*, EST-3*, EST-4*, EST-5*, and PGM* were polymorphic. Variability values (mean observed heterozygosity, mean number of alleles per locus, and polymorphism) for small shrimp were 0.029 ± 0.020, 1.5 ± 0.20, and 22%, whereas for large shrimp were 0.020 ± 0.010, 1.7 ± 0.20, and 28%. No significant difference was found in heterozygosity for both size-classes. All loci were out of Hardy-Weinberg equilibrium because of a heterozygote deficiency and high inbreeding values. EST-2* and PGM* showed differences in allelic frequencies among both size-classes, and an Fst value of 1.6% was recorded. Both size-classes have a different genetic population structure. Because of the poor information of the analyzed loci and to corroborate that EST-2* and PGM* are involved in growth, it would be necessary to follow the inheritance of those loci in successive generations. Con la finalidad de encontrar una relación entre la heterocigosis alozímica y el tamaño del camarón blanco Penaeus (Litopenaeus) vannamei cultivado, se tomó una muestra al final de un cultivo experimental. La muestra consistió de 72 organismos pequeños con un peso promedio de 7.1 ± 1.35 g y 72 organismos mayores con peso promedio de 17.5 ± 1.34 g. Se analizaron diez sistemas enzimáticos. Dieciocho loci mostraron buena resolución para una interpretación genética. Sólo EST-2*, EST-3*, EST-4*, EST-5* y PGM* fueron polimórficos. Los valores de variabilidad (heterocigosis media observada, promedio de alelos por locus y polimorfismo) para los camarones pequeños fueron de 0.029 ± 0.020, 1.5 ± 0.20 y 22%, mientras que para los mayores fueron de 0.020 ± 0.010, 1.7 ± 0.20 y 28%. No se encontraron diferencias significativas entre las heterocigosis de ambos tamaños de clase pero si tuvieron una diferente estructura genética poblacional. Todos los loci estuvieron fuera del equilibrio de Hardy-Weinberg debido a una deficiencia de heterocigotos y altos valores de endogamia. Se obtuvo un valor de Fst de 1.6% y los loci EST-2* y PGM* mostraron diferencias en las frecuencias alélicas entre ambos tamaños de clase. Iniversidad Autónoma de Baja California 2005-03-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/70 10.7773/cm.v32i1.70 Ciencias Marinas; Vol. 32 No. 1 (2006); 1-11 Ciencias Marinas; Vol. 32 Núm. 1 (2006); 1-11 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/70/52 |
| institution |
Ciencias Marinas |
| collection |
OJS |
| language |
eng |
| format |
Online |
| author |
Rivera-García, M Grijalva-Chon, JM |
| spellingShingle |
Rivera-García, M Grijalva-Chon, JM Genetic variability and differentiation in cultured white shrimp Penaeus (Litopenaeus) vannamei with low and high growth |
| author_facet |
Rivera-García, M Grijalva-Chon, JM |
| author_sort |
Rivera-García, M |
| title |
Genetic variability and differentiation in cultured white shrimp Penaeus (Litopenaeus) vannamei with low and high growth |
| title_short |
Genetic variability and differentiation in cultured white shrimp Penaeus (Litopenaeus) vannamei with low and high growth |
| title_full |
Genetic variability and differentiation in cultured white shrimp Penaeus (Litopenaeus) vannamei with low and high growth |
| title_fullStr |
Genetic variability and differentiation in cultured white shrimp Penaeus (Litopenaeus) vannamei with low and high growth |
| title_full_unstemmed |
Genetic variability and differentiation in cultured white shrimp Penaeus (Litopenaeus) vannamei with low and high growth |
| title_sort |
genetic variability and differentiation in cultured white shrimp penaeus (litopenaeus) vannamei with low and high growth |
| description |
To find a relationship between allozyme heterozygosity and body size in cultured white shrimp, Penaeus (Litopenaeus) vannamei, a sample was taken at the end of an experimental culture; 72 small organisms of 7.1 ± 1.35 g average weights, and 72 large organisms of 17.5 ± 1.34 g average weights. Ten enzymatic systems were analyzed. Eighteen loci showed good resolution for genetic interpretation. Only EST-2*, EST-3*, EST-4*, EST-5*, and PGM* were polymorphic. Variability values (mean observed heterozygosity, mean number of alleles per locus, and polymorphism) for small shrimp were 0.029 ± 0.020, 1.5 ± 0.20, and 22%, whereas for large shrimp were 0.020 ± 0.010, 1.7 ± 0.20, and 28%. No significant difference was found in heterozygosity for both size-classes. All loci were out of Hardy-Weinberg equilibrium because of a heterozygote deficiency and high inbreeding values. EST-2* and PGM* showed differences in allelic frequencies among both size-classes, and an Fst value of 1.6% was recorded. Both size-classes have a different genetic population structure. Because of the poor information of the analyzed loci and to corroborate that EST-2* and PGM* are involved in growth, it would be necessary to follow the inheritance of those loci in successive generations. |
| publisher |
Iniversidad Autónoma de Baja California |
| publishDate |
2005 |
| url |
https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/70 |
| _version_ |
1715723930951483392 |
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