Early selection in a population of the mangaba (Hancornia speciosa Gomes)

Maria Clideana Cabral Maia, Lúcio Borges de Araújo, Carlos Tadeu dos Santos Dias, Luís Cláudio de Oliveira, Lucio Flavo Lopes Vasconcelos, Paulo Sarmanho da Costa Lima

Resumo


The mangaba is a fruit tree with great potential for the northeast of Brazil. Due to the scarcity of improved cultivars, and as it is a species that is still in the process of domestication, exploitation has been based on rational and sustainable extractivism by farmer-gatherers. The aim of this study was to analyse the correlations between technological variables of the mangaba, and to carry out an early selection of the genotypes that make up the base population of the mangaba improvement program of Embrapa Meio-Norte. The variables fruit weight, pulp weight and percentage pulp show significant correlation with fruit length and fruit diameter, allowing indirect selection for the first set of variables by means of the latter, which are easily measured. Genotypes 4, 13, 16, 21, 25, 32, 35 and 49 show a positive association with fruit weight, fruit length, fruit diameter, pulp weight and percentage weight, and are therefore candidates for selection. Principal component 1 is associated with fruit weight, fruit length, fruit diameter, skin weight, number of seeds per fruit, seed weight, TTA and pulp weight. These variables can be selected with greater mathematical certainty, since this component concentrates more information regarding variability and is therefore more important.

Palavras-chave


Principal Components. Phenotypic Correlations. Genetic Improvement.

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DOI: http://dx.doi.org/10.18227/1982-8470ragro.v14i0.6022

Direitos autorais 2020 REVISTA AGRO@MBIENTE ON-LINE

Revista Agroambiente On-line ISSN 1982-8470 (online), www.agroambiente.ufrr.br. E-mail: agroambiente@ufrr.br. Licença Creative Commons
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