Genetic diversity of American wild rice species
| Autor: | D C Cardim, Roland Vencovsky, Rainério Meireles da Silva, Elizabeth Ann Veasey, Maria Imaculada Zucchi, Eduardo de Andrade Bressan |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Jaccard index
Outcrossing DIVERSIDADE GENÉTICA Biology Oryza CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL::SILVICULTURA::GENETICA E MELHORAMENTO FLORESTAL [CNPQ] Botany genetic structure Oryza glumaepatula lcsh:Agriculture (General) Amazon Genetic diversity O. grandiglumis Amazon rainforest Genética vegetal Arroz selvagem food and beverages biology.organism_classification Ex situ conservation lcsh:S1-972 O. latifolia Genetic structure Animal Science and Zoology Ploidy Agronomy and Crop Science Oryza latifolia Oryza grandiglumis |
| Zdroj: | Scientia Agricola, Vol 68, Iss 4, Pp 440-446 (2011) Scientia Agricola, Volume: 68, Issue: 4, Pages: 440-446, Published: AUG 2011 Repositório Institucional da UFPA Universidade Federal do Pará (UFPA) instacron:UFPA Scientia Agricola v.68 n.4 2011 Scientia Agrícola Universidade de São Paulo (USP) instacron:USP Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) ResearcherID |
| ISSN: | 0103-9016 |
| Popis: | Studies on genetic diversity and genetic structure of natural populations are important in order to define strategies for in situ and ex situ conservation actions and for plant pre-breeding programs. Aiming to assess the genetic diversity and genetic structure of three wild American Oryza species with isozyme markers, 14 populations of the diploid O. glumaepatula (AglAgl), 11 populations of the tetraploid O. grandiglumis (CCDD) and five populations of the also tetraploid O. latifolia (CCDD) were studied. They were all originated from Rio Paraguay hydrographic basin and the Amazon. Four enzymes were used and they gave 40 polymorphic bands. The most polymorphic species was O. glumaepatula, followed by O. latifolia and O. grandiglumis. A cluster analysis with the Jaccard similarity coefficient separated the diploid from the two tetraploid species, and also the two tetraploid species. This separation was also evident on a scatter plot from a principal component analysis, suggesting that they should be treated as two separate species, although further studies are necessary to provide support for this affirmative. The AMOVA analyses showed a high intrapopulational variability for O. latifolia (67.6%) and O. grandiglumis (52.2%), when compared to their interpopulational variability (32.4% and 47.8%, respectively), which suggests the hypothesis of a higher degree of outcrossing events within these species. When studying the correlation between the Jaccard dissimilarity coefficient and geographic distances, a spatial genetic structure was observed for O. glumaepatula only. These results are important for defining strategies of both in situ and ex situ conservation. SILVA, R. M. Universidade Federal do Pará |
| Databáze: | OpenAIRE |
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