Caracterização de frutos e árvores de populações naturais de Hancornia speciosa Gomes do cerrado

Abstract

O trabalho objetivou caracterizar árvores e frutos de populações naturais de Hancornia speciosa Gomes, bem como avaliar a distribuição da variabilidade fenotípica existente. Populações de mangabeiras foram amostradas no Cerrado, incluindo os Estados de Goiás, Tocantins, Mato Grosso, Mato Grosso do Sul e Bahia, abrangendo 109 matrizes de 35 populações das variedades botânicas pubescens, gardneri, speciosa e cuyabensis. Os resultados mostraram que, nas condições do Cerrado, as matrizes de H. speciosa apresentam elevados níveis de variação fenotípica quanto a caracteres de frutos, sendo que a maioria dessas variações está entre populações. Há, também, uma grande variação fenotípica dentro das variedades botânicas. H. speciosa var. gardneri e H. speciosa var. pubescens têm frutos maiores e mais pesados. A variedade botânica gardneri apresenta porte mais alto que as demais. Nas variedades gardneri e pubescens, predominam frutos redondos e verde-claros, enquanto em speciosa e cuyabensis predominam frutos de formato oblongo e coloração amarelo-escura e verde-escura, respectivamente. As variedades gardneri e pubescens destacam-se como de maior potencial para a seleção baseada em caracteres de tamanho e massa dos frutos.

Morphological Dissimilarity Among Mangabeira Tree Populations From Amapá and Paraíba, Brazil

“…For the other parameters, we observed significant 1% differences, indicating that the progenies that compose the native origins are distinct in productive aspects, demonstrating that there are fundamental differences between that the two populations which were also observed by Ganga, Chaves and Naves (2009) in a study with different natural populations. Our results are in agreement with the results found by Ganga et al (2010), where the variation was mostly due to phenotypic variation among the progenies.…”

“…Identification of the population from Paraiba was possible through VA, CCP, and ALP, which showed phenotypic (σ 2 F ) and genetic (σ 2 G ) variance with no discrepant estimates, allowing to estimate the CVg/ CVa relationship indicative of each selection, with values between 1.19 and 0.73, respectively. In other features, the phenotype observed was influenced, almost exclusively, by environmental effects, similar to the findings of Ganga et al (2010). In this study, it was therefore not possible to estimate the genetic variance and, therefore, the relationship, this means that there is intense response from the progenies before changes in environmental factors imposed.…”

“…In a similar study, Ganga et al (2010) observed differences in vegetative and productive characteristics, with similarity only for PMP.…”

“…In our study, we found that PMP showed one of the lowest CV values among the evaluated characteristics. In the work of Ganga et al (2010), for PMP, CMF, DF, and NMS, CV values were higher and, related to the average, PMP, DF, and NMS showed lower CV values. In a similar study, Sano et al (2012) observed similar average values for DF, but lower values for CMF and higher values for PMP and NEF.…”

“…In particular, Ganga et al (2010) observed high levels of phenotypic variation in fruit ratings, which were higher among different populations. Furthermore, the existing phenotypic variation is strongly influenced by environmental components such as anthropization level, soil condition, climate, age of the plants, and genetic differences between individuals.…”