Variabilidade morfoagronômica da coleção de germoplasma de mangabeira (Hancornia speciosa Gomes) da Universidade Federal de Goiás
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2015-08-28
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Universidade Federal de Goiás
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This study aimed to characterize the Mangaba (Hancornia speciosa Gomes) Germplasm Collection owned by the Universidade Federal de Goiás, by measuring 40 morpho-agronomic characters. The collection was designed in randomized blocks with 57 treatments (progenies) and four replications, totaling 192 individual accesses, which represent 29 natural populations and four botanical varieties. The variance components estimation was done using random model, and REML procedure, considering the effects of botanical varieties, populations within varieties, progenies within populations and individuals within progenies. Considering 40 morpho-agronomic characters, it was observed that there is significant genetic variability in seven characters among the progenies, 24 characters among the populations and 18 characters among botanical varieties. In addition, individual heritability was higher than 50% in 21 of them. The highest percentual individual selection gain was estimated for the character number of fruits produced by each plant. Significant correlation in some biometric characters between young and adult plants was noticed, including their productivity, which suggests the possibility of early selection. Among the 55
genetic correlations among the agronomic characters, 25 were significative. The fruit production peak occurred between June and October, H. speciosa var. cuyabensis being the most productive one. Multivariate analyses results showed that H. speciosa var. speciosa is the most genetically different in comparison with the others. The characters suggested as minimum quantitative descriptors for the Mangaba tree were: leaf length and width, petiole length and diameter, length between the knot, corolla diameter, flower peduncle diameter, fruit length and diameter, number of fruits, plant height and first branching height
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ALMEIDA, G. Q. de. Variabilidade morfoagronômica da coleção de germoplasma de mangabeira (Hancornia speciosa Gomes) da Universidade Federal de Goiás. 2015. 105 f. Dissertação (Mestrado em Genética e Melhoramento de Plantas) - Universidade Federal de Goiás, Goiânia, 2015.