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| Leuzzi,Maria Sueli Papa; Almeida,Fernanda Simões de; Orsi,Mário Luís; Sodré,Leda Maria Koelblinger. |
| In this study, the RAPD technique was used to analyze the genetic structure of populations of the fish Astyanax altiparanae (Characidae, Tetragonopterinae) living in the lower, middle and upper Paranapanema River, Brazil. The aim was to assess this structure regarding fish handling and conservation programs. The genetic variability (P) was found to be 42.64%, 75% and 75% in the low, middle and upper reaches, respectively. The dendrogram of genetic similarity, obtained by comparative analysis of the sets of samples from the three sites, showed the formation of three clusters. All of the genetic parameters used indicate that the population in the lower Paranapanema is genetically different from those in the middle and upper sections. The theta P test shows... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Astyanax altiparanae; RAPD; Genetic structure; Genetic conservation; Fish. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000300009 |
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| Lopes,Carla Martins; Almeida,Fernanda Simões de; Orsi,Mário Luís; Britto,Sandro Geraldo de Castro; Sirol,Rodolfo Nardez; Sodré,Leda Maria Koelblinger. |
| The aim of this study, utilizing RAPD techniques, was to determine the genetic variability of Salminus brasiliensis groups collected at passage ladders of the hydroelectric plants (HEP) Canoas I and Canoas II - Paranapanema River (Brazil), as well as to estimate the population structure through different parameters of genetic diversity. The data obtained allowed us to conclude that S. brasiliensis of the Canoas Complex has a moderate index of genetic variability ( > 42.00%) when compared to that of other migratory fish species. All genetic diversity analyses (distance = 0.015 and genetic identity = 0.985, F ST =0.018, AMOVA) were signs of low genetic differentiation, and they led to the clustering of S. brasiliensis from Canoas I and Canoas II. This... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish transposition; Geneticdiversity; RAPD. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000200006 |
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| Chiari,Lucimara; Sodré,Leda Maria Koelblinger. |
| Genetic variability was studied in five fish species (Anostomidae): Schizodon intermedius and S. nasutus and Leporinus friderici, L. elongatus and L. obtusidens, collected at one location on the Tibagi River (Paraná, Brazil). The protein data from seven systems coded collectively for 19 loci in the liver, muscle and heart. Nine of these loci were polymorphic. The estimated proportion of polymorphism loci (<img src="http:/img/fbpe/gmb/v22n4/si_p_.gif" align="absmiddle">) varied from 16.7% in S. intermedius to 36.9% in L. friderici; the mean heterozygosity observed (<img src="http:/img/fbpe/gmb/v22n4/si_h_.gif" alt="si_h_.gif (76 bytes)" align="absmiddle">o) was 0.027 ± 0.015 and 0.109 ± 0.042, respectively. The estimated value of the genetic... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47571999000400009 |
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