Abstract
ABSTRACT Hymenaea courbaril is a rare species in the riparian areas of the state of Sergipe, Brazil. This species is known as Brazilian cherry or Brazilian copal and it occurs in fragments of the Rainy Forest and in the transition zones between the Rainy Forest and the Caatinga Biomes. This work was carried out, in order to quantify the genetic diversity of the remaining population of Brazilian cherry, by RAPD markers. In a studied area of 100 ha in the low course of the São Francisco River, only 15 individuals were observed. The analyzed parameters were as follows: Jaccard’s genetic similarity, the number of observed alleles, the number of effective alleles, the genetic diversities of Nei, the percentages of the polymorphic loci, the genetic diversities when using the Shannon index and the coancestry coefficient. There was no correlation between the genetic distances and the geographical distances. Despite the low number of individuals, high genetic diversity was observed, a fact that contributes to the development of strategies for the conservation of the species.
Highlights
The São Francisco River in Brazil displays a special role for agriculture and for the ecological environment
The existence of the most recent molecular marker techniques does not underestimate the RAPD utility as a tool for the development of strategies, for the conservation of individuals and their seed collections (Santana et al, 2008; Gois, 2014a; Belarmino et al, 2017). These molecular markers are often recommended in genome studies of little-known species like Himenaea courbaril
Due to the need to preserve the species, as well as to define the necessary strategies for its management and for its seed collections, together with producing a seed orchard for the progeny tests, this study was carried out in order to evaluate the genetic diversity of the natural population of H. courbaril species
Summary
The São Francisco River in Brazil displays a special role for agriculture and for the ecological environment. State Environment and Water Resources, as well as with the Brazilian Institute of the Environment and Renewable Natural Resources (IBAMA) As a consequence, it has developed recovery actions for degraded areas, mainly in the Lower São Francisco River Basin. The protection of the São Francisco riverbanks involves the use of vegetation, or soil bioengineering, in order to stabilize the soil, so as to avoid any further erosion of these river banks (Holanda; Rocha; Oliveira, 2008) These management procedures include sediment removal and channels, in order to improve the flow of the river and to minimize the loss of soil, due the high speed of the water around obstructions. Due to the need to preserve the species, as well as to define the necessary strategies for its management and for its seed collections, together with producing a seed orchard for the progeny tests, this study was carried out in order to evaluate the genetic diversity of the natural population of H. courbaril species
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