Rev. Bras. Saúde Prod. Anim., Salvador, v.13, n.3, p.880-893 jul./set., 2012 http://www.rbspa.ufba.br ISSN 1519 9940 880 Ontogeny and embryonic description of Betta splendens, Perciformes (Regan, 1910)Ontogenia e descrição embrionária em "Betta splendens"
-(Genetic structure of natural populations of Tibouchina papyrus (pau-papel) in areas of cerrado rupestrian fi elds). This paper has the aim of using RAPD markers to describe the genetic of variability of Tibouchina papyrus (Pohl) Toledo local populations, from the regions of Serra Dourada and Serra de Pirineus, in Goiás State, Central Brazil. The six RAPD primers generated a total of 147 loci, varying from 23 to 26 per primer. The hierarchical evaluation of genetic variability, performed using an Analysis of Molecular Variance (AMOVA) considering the local populations within the two regions (i.e., Serra Dourada and Serra de Pirineus), showed an estimate of overall diversity among populations equal to Φ ST = 0.3439. The value of divergence between regions (Φ CT ) was equal to 18.96% so that the variation among local populations within regions was equal to 15.43%. Estimates of gene fl ow suggest a small number of migrants among local populations per generation. Multivariate analyses (UPGMA and NMDS) indicated that a relationship between genetic and geographical distances exists, which was confi rmed by a spatial pattern analysis using Mantel test (r = 0.71; P < 0.015 with 1000 random permutations). Thus, this structure was originated from a stochastic neutral model of population differentiation, in which drift within populations is counteracted by short distance gene fl ow. Despite strong levels of population structure (i.e., high divergence among populations within regions), the diversity observed support the hypothesis that T. papyrus is a facultative xenogamous species. The lack of high levels of homozigosity indicates that ecological mechanisms related to species' reproductive biology prevent, someway, a high level of endogamy within local structured populations, which could cause deleterious effects in a long run.Key words -cerrado, genetic variability, RAPD, Tibouchina papyrus RESUMO -(Estrutura genética em populações naturais de Tibouchina papyrus (pau-papel) em áreas naturais de campo rupestre no cerrado). O presente trabalho teve como objetivo utilizar marcadores RAPD para conhecer a variabilidade genética de populações de Tibouchina papyrus (Pohl) Toledo, provenientes da região de Serra Dourada e Serra dos Pirineus, no Estado de Goiás. Os seis iniciadores RAPD produziram um total de 147 locos, variando entre 23 e 26 por iniciador. A avaliação hierárquica da estruturação da variabilidade genética, realizada pela a AMOVA, considerando a existência de duas regiões (Serra dos Pirineus e Serra Dourada) apresentou uma estimativa de Φ ST = 0,3439. O valor do componente entre regiões (Φ CT ) foi igual a 18,96% e a variação entre populações dentro de regiões igual a 15,43%. As estimativas de fl uxo gênico sugerem a existência de uma baixa proporção de migrantes entre populações. As análises multivariadas (UPGMA e NMDS) indicam que existe uma relação entre distância genética e espaço geográfi co, hipótese esta que foi confi rmada por uma análise de padrão espacial utilizando o teste de Mantel (r = 0,71; ...
RESUMOO objetivo do estudo foi realizar uma análise cienciométrica na base de dados SciELO sobre "melhoramento genético". Foram analisadas 522 publicações, nas quais 81% referem-se a vegetais, 17% a animais e 2% de outros. Este estudo destaca também o elevado número de publicações com Bovinos e grande distribuição de publicações entre vegetais, destacando Feijão, Maracujá, Milho, Soja, Café e Trigo. Termos para indexação: cienciometria, melhoramento genético, SciELO. SCIENTIFIC PRODUCTION OF GENETIC IMPROVEMENT BY SCIELO DATA BASE IN THE LAST 10 YEARSABSTRACT The aim of the study was to conduct a scientometric analysis based on SciELO data on "genetic improvement". 522 publications in which 81% refer to plants, animals and 17% to 9% of others were analyzed. This study also highlights the high number of publications with large cattle and distribution of publications between plant, highlighting Beans, Passion Fruit, Corn, Soybean, Coffee and Wheat.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.