SciELO - Scientific Electronic Library Online

 
vol.33 número1Híbridos experimentais de melão rendilhado cultivados em solo e substratoSeleção de progênies e genitores de pessegueiro com base nas características dos frutos índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Revista Brasileira de Fruticultura

versão impressa ISSN 0100-2945

Resumo

AGUIAR, Ananda Virginia de et al. Relation between the genetic variation of quantitative traits and the molecular markers in subpopulations (Eugenia dysenterica DC). Rev. Bras. Frutic. [online]. 2011, vol.33, n.1, pp.157-169. ISSN 0100-2945.  https://doi.org/10.1590/S0100-29452011000100021.

This research aimed to measure the association between molecular diversity and the genetic variation of quantitative traits, estimated from a progeny trial, under controlled conditions. Ten natural subpopulations of cagaita tree from the southeast of Goiás State, Brazil, were investigated. The maternal families were evaluated in a trail using the randomized complete block design with four replications and a single tree per plot. Quantitative data were analyzed estimating the coefficient of heritability (hmi2 ), on a progeny mean basis and the genetic coefficient of variation (CVgi) for each subpopulation. The traits considered were: plant height and the respective diameter and the corresponding annual rates of increment. Estimates of gene diversity (Hei) and fixation index (fi), available for the same subpopulations, based on isozymes, SSR and RAPD markers, were taken for comparison. Simple linear correlation and multiple regression analysis were used for measuring the association between those estimates on intra and interpopulation level. The weak correlation between gene diversity estimated with codominant and dominant markers reduced the expectation of a good correlation between those statistics and the genetic variation of the quantitative traits. In general, the possibility to infer the magnitude of quantitative variation within subpopulations, based on molecular gene diversity, was not confirmed. RAPD results were more promising, indicating the importance to have an adequate genomic coverage in this kind of research. On the other hand, the interpopulation level, a much better association was detected for all markers. The possibility of predicting quantitative variation based on molecular information was, therefore, not excluded.

Palavras-chave : correlation; multiple regression; molecular marker; quantitative traits; genetic conservation.

        · resumo em Português     · texto em Português     · Português ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons