V.C.R. Azevedo
Diversity and genetic structure of the native Brazil nut tree (Bertholletia excelsa Bonpl.) population
The present study was carried out in a native Brazil nut tree population (Bertholletia excelsa Bonpl., Lecythidaceae) to assess its genetic diversity and structure. Ten microsatellite markers were used to genotype 198 adult trees (B. excelsa). The population presented high genetic diversity and inbreeding absence rates. The empirical Bayesian method showed three dis.. Read More»
Genet. Mol. Res. 16(3): gmr16039702
DOI: 10.4238/gmr16039702
Morphological and molecular characteristics do not confirm popular classification of the Brazil nut tree in Acre, Brazil
In the State of Acre, the Brazil nut tree, Bertholletia excelsa (Lecythidaceae), is classified by the local population into two types according to morphological characteristics, including color and quality of wood, shape of the trunk and crown, and fruit production. We examined the reliability of this classification by comparing morphological and molecular data of four populations of Brazil nut.. Read More»
Genet. Mol. Res. 12(3): 2013.September.27.3
DOI: 10.4238/2013.September.27.3
Diversity and genetic structure of mangaba remnants in states of northeastern Brazil
In this study, we analyzed the genetic diversity and structure of remnants of mangaba populations in states of northeastern Brazil by applying 9 microsatellite markers previously developed to establish conservation strategies for germplasm and species preservation. Six to 20 individuals per population were analyzed, with a total of 94 individuals and 6 populations from the states of Ceará.. Read More»
Genet. Mol. Res. 14(1): 2015.February.2.7
DOI: 10.4238/2015.February.2.7
Diversity and genetic structure among subpopulations of Gossypium mustelinum (Malvaceae)
Gossypium mustelinum is the only cotton species native to Brazil; it is endemic to the semi-arid region of the northeast. The populations are found near perennial and semi-perennial sources of water, such as ponds or pools in intermittent streams. Problems with in situ conservation derive from human interference in its habitat, mainly because of excessive cattle grazing and deforestation. Estab.. Read More»
Genet. Mol. Res. 12(1): 2013.February.27.9
DOI: 10.4238/2013.February.27.9
Isolation and characterization of microsatellite markers for Bertholletia excelsa (Lecythidaceae) population genetic analysis
Seven polymorphic microsatellite markers were developed and validated for Bertholletia excelsa (Brazil nut tree) population genetic studies. This species is a widespread monotypic Amazonian tree with high non-timber economic value. Unfortunately, Brazil nut production is currently less than 25% of historical production levels, because of extensive deforestation. All pairs of primers produced cl.. Read More»
Genet. Mol. Res. 13(4): 2013.November.7.2
DOI: 10.4238/2013.November.7.2
Hierarchical outcrossing among and within fruits in Bertholletia excelsa Bonpl. (Lecythidaceae) open-pollinated seeds
Knowing the mating patterns is important to determine the number of trees necessary for seed collection for conservation ex situ, tree breeding and environmental reforestation purposes. We investigated B. excelsa individuals and fruits, to check mating system index variations in a population by using open-pollinated seeds which were hierarchically sampled within and.. Read More»
Genet. Mol. Res. 17(1): gmr16039872
DOI: 10.4238/gmr16039872
Contemporary pollen and seed dispersal in natural populations of Bertholletia excelsa (Bonpl.)
Due to the nutritional content and commercial value of its seeds, Bertholletia excelsa is one of the most important species exploited in the Amazon region. The species is hermaphroditic, insect pollinated, and its seeds are dispersed by barochory and animals. Because the fruit set is dependent on natural pollinator activity, gene flow plays a key role in fruit produ.. Read More»
Genet. Mol. Res. 16(3): gmr16039756
DOI: 10.4238/gmr16039756
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