Rescue of a non-viable accession and RAPD analysis of recovered plants of Arachis retusa
In vitro regeneration of Arachis retusa was examined for the purpose of germplasm renewal and conservation. Random amplified polymorphic DNA (RAPD) fingerprinting was used to evaluate the genetic stability of plants derived from embryo axes and apical segments. Ten arbitrary decamer primers were scr...
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Veröffentlicht in: | Pesquisa agropecuaria brasileira 2004-02, Vol.39 (2), p.197-199 |
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Zusammenfassung: | In vitro regeneration of Arachis retusa was examined for the purpose of germplasm renewal and conservation. Random amplified polymorphic DNA (RAPD) fingerprinting was used to evaluate the genetic stability of plants derived from embryo axes and apical segments. Ten arbitrary decamer primers were screened and five of them were selected. Ninety genomic regions were evaluated, with an average of 18 loci per clone. All amplified segments were monomorphic. The results indicate that recovered plants are genetically stable at the assessed genomic regions and that both regeneration processes are suitable for in vitro germplasm preservation of Arachis species.
A regeneração in vitro de Arachis retusa foi avaliada visando à renovação e conservação de germoplasma. A estabilidade genética de plantas derivadas de eixos embrionários e segmentos apicais foi avaliada por RAPD. Foram analisados dez oligonucleotídeos decâmeros arbitrários, dos quais cinco foram selecionados. Noventa regiões genômicas foram avaliadas, com uma média de 18 loci por clone. Todos os segmentos amplificados foram monomórficos. Estes resultados indicam que as plantas são geneticamente estáveis nas regiões genômicas examinadas e que ambos os processos são adequados para a conservação in vitro do germoplasma de Arachis. |
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ISSN: | 0100-204X 1678-3921 1678-3921 0100-204X |
DOI: | 10.1590/S0100-204X2004000200015 |