Data/hora: 01/06/2024 09:32:08

Provedor de dados: | 74
País: | Brazil
Título: | PCR-based VNTR core sequence analysis for inferring genetic diversity in the shrimp Litopenaeus vannamei
Autores: | Freitas,Patrícia Domingues de; Galetti Junior,Pedro Manoel.
Data: | 2002-01-01
Ano: | 2002
Palavras-chave: | Litopenaeus vannamei; Genetic diversity; Shrimp; VNTR; PCR.
Resumo: | The genetic variation in two farmed strains (F3-Panama and F17-Venezuela) of the shrimp Litopenaeus vannamei was examined based on DNA multiloci analyses. Eighteen adults of each strain were analyzed by PCR using a set of VNTR core sequence primers. Genetic similarity, mean allele frequency, mean heterozygosity and the frequency of polymorphic loci were determined for both strains. A dendrogram of genetic similarity was produced by UPGMA clustering. The results for three primers (INS, M13, YN73) revealed different levels of genetic variation within the strains. The higher genetic similarity seen within strain F17 was apparently related to inbreeding, although a bottleneck effect could not be discarded. The low level of genetic variability of this strain could account for the reduced adaptive advantage of these animals and their inability to adjust to breeding conditions in Brazil.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572002000400012
Editor: | Sociedade Brasileira de Genética
Relação: | 10.1590/S1415-47572002000400012
Formato: | text/html
Fonte: | Genetics and Molecular Biology  v.25 n.4 2002
Fonte: | info:eu-repo/semantics/openAccess