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Previous issue date: 2012-09-28 / Worldwide, families Carangidae and Rachycentridae represent one of the groups
most important commercial fish, used for food, and great potential for marine aquaculture.
However, the genetic bases that can underpin the future cultivation of these species,
cytogenetic between these aspects are very weak. The chromosomal patterns have
provided basic data for the exploration of biotechnological processes aimed at handling
chromosomal genetic improvement, such as induction of polyploidy, androgenesis and
ginogenesis, as well as obtaining monosex stocks and interspecific hybridizations. This
paper presents a comprehensive cytogenetic survey in 10 species, seven of the family
Carangidae and the monotypic family Rachycentridae. Classical cytogenetic analysis and in
situ mapping of multigene sequences were employed, and additionally for the genus Selene
and morphotypes of Caranx lugubris, comparisons were made using geometric
morphometrics. In general, conservative species exhibit a marked chromosome number
(2n=48). Although present in large part, different karyotypic form, retain many
characteristics typical of chromosomal Order Perciformes, the high number of elements
monobrachyal, Ag-NORs/18S rDNA sites and heterochromatin simply reduced, preferably
centromeric. The main mechanisms involved in karyotypic diversification are the
pericentric inversions, with secondary action of centric fusions. In addition to physical
mapping and chromosome detail for the species are presented and discussed patterns of
intra-and interspecific diversity, cytotaxonomic markers. This data set provides a better
understanding of these patterns caryoevolutyonary groups and conditions for the
development of protocols based on Biotechnology for chromosomal manipulation Atlantic
these species / Entre os peixes marinhos, as fam?lias Carangidae e Rachycentridae se apresentam
como grupos de grande import?ncia comercial pela pesca e potencial para piscicultura
marinha. Entretanto, bases gen?ticas que possam alicer?ar o futuro cultivo destas
esp?cies, sobretudo seus aspectos citogen?ticos s?o incipientes. Os padr?es
cromoss?micos t?m fornecido dados b?sicos para a prospec??o de processos
biotecnol?gicos de manipula??o cromoss?mica voltados ao melhoramento gen?tico, como
a indu??o a poliploidia, ginog?nese e androg?nese, assim como obten??o de estoques
monossexo e hibridiza??es interespec?ficas. Neste trabalho ? apresentado um amplo
levantamento citogen?tico em 10 esp?cies, sendo sete da fam?lia Carangidae e de
Rachycentron canadum, esp?cie monot?pica da fam?lia Rachycentridae. A caracteriza??o
citogen?tica cl?ssica e mapeamento in situ de sequ?ncias multig?nicas foram empregadas.
Adicionalmente em esp?cies do g?nero Selene e em morf?tipos de Caranx lugubris foram
realizadas compara??es atrav?s de morfometria geom?trica. Em geral, as esp?cies
exibiram um marcante conservadorismo cromoss?mico num?rico (2n=48). Apesar de
apresentar, em grande parte, f?rmulas cariot?picas diferenciadas, conservam diversas
caracter?sticas cromoss?micas t?picas da Ordem Perciformes, como elevado n?mero de
elementos monobraquiais, s?tios Ag-RONs/ DNAr 18S simples e heterocromatina reduzida,
preferencialmente centrom?rica. Os principais mecanismos envolvidos na diversifica??o
cariot?pica s?o as invers?es peric?ntricas, com a??o secund?ria de fus?es c?ntricas. Al?m
do mapeamento f?sico e detalhamento cromoss?mico para as esp?cies s?o apresentados e
discutidos padr?es de variabilidade intra e diversifica??o interespec?ficas, com
identifica??o de marcadores citotaxon?micos. Este conjunto dos dados propicia um
melhor conhecimento dos padr?es carioevolutivos destes grupos e condi??es para o
desenvolvimento de protocolos biotecnol?gicos baseados na manipula??o cromoss?mica
para estas esp?cies Atl?nticas
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/12645 |
| Date | 28 September 2012 |
| Creators | Jacobina, Uedson Pereira |
| Contributors | CPF:56615043491, http://lattes.cnpq.br/8437464961129518, Blaha, Carlos Alfredo Galindo, CPF:80573380082, http://lattes.cnpq.br/2307806644081146, Souza, Liliane de Lima Gurgel, CPF:03095950454, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4701211U3, Lunardi, Vitor de Oliveira, CPF:19166162831, http://lattes.cnpq.br/2502162313135026, Moreira Filho, Orlando, CPF:55060870804, http://lattes.cnpq.br/3927076022470557, Molina, Wagner Franco |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Biotecnologia, UFRN, BR, Biotecnologia Industrial; Biotecnologia em Agropecu?ria; Biotecnologia em Recursos Naturais; Biotecn |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/embargoedAccess |
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