Data/hora: 13/06/2024 03:53:01

Provedor de dados: | 65
País: | Brazil
Título: | Genetic divergence among Dimorphandra spp. accessions using RAPD markers
Autores: | Sudré,Cláudia Pombo; Rodrigues,Rosana; Gonçalves,Leandro Simões Azeredo; Martins,Ernane Ronie; Pereira,Messias Gonzaga; Santos,Marilene Hilma dos.
Data: | 2011-04-01
Ano: | 2011
Palavras-chave: | Fava-d'ant; Molecular characterization; Plant genetic resource; Germoplasm.
Resumo: | The genus Dimorphandra has distinguish relevance considering either medicinal or biodiversity aspects because it includes two species that are economically important flavonoids sources for pharmachemical industry (D. mollis Benth. and D. gardneriana Tul.), and species endemic to Brazil, such as D. jorgei Silva and D. wilsonii Rizz., threatened by extinction. In order to evaluate variability among accessions of D. mollis (fava-d'anta), D. gardneriana and D. wilsonii, it was collected fruit from individual plants from three Brazilian states in a total of 57 accessions, which were analyzed with RAPD markers. It was used 20 seeds per progeny; the DNA was extracted from fully-formed young leaves, which were collected in bulk. The data were analyzed using a binary matrix, in which the score one represented presence of a band and zero, absence. The similarity matrix was developed by using the arithmetic complement of the Jaccard index, later grouped based on the Neighbor Joining algorithm. It was found considerable intra and inter specific variability in Dimorphandra spp., which were separated into four groups. Though genetic variability was found, the collecting trips showed that most of these areas are subject to loss of genetic resources of fava-d'anta due to the following factors: continuous anthropic activity, propensity for natural fires, and loss of natural seed dispersers (large fruit-eating mammals). Therefore, protections of these areas and ex situ conservation are essentials for the maintenance of genetic variability of these species.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782011000400010
Editor: | Universidade Federal de Santa Maria
Relação: | 10.1590/S0103-84782011005000024
Formato: | text/html
Fonte: | Ciência Rural  v.41 n.4 2011
Fonte: | info:eu-repo/semantics/openAccess