In this paper random amplified polymorphic DNA (RAPD) was used to evaluate the degree of among-population differentiation
and associated spatial patterns of genetic divergence for
Dipteryx alata Vogel populations from Cerrado region of central Brazil, furnishing support for future programs of conservation of this species.
We analyzed patterns of genetic and spatial population structure using 45 RAPD loci scored for 309 trees, sampled from five
different regions with two populations each. Genetic structure analysis suggested that panmixia null hypothesis can be rejected,
with significant among-population components of 15%. Hierarchical partition by Analysis of Molecular Variance (AMOVA) shows
that 5% of genetic variation is within regions, whereas 10% of variation is among regions, and these results were confirmed
by a Bayesian analyses on HICKORY. The Mantel correlogram revealed that this divergence is spatially structured, so that local
populations situated at short geographic distances could not be considered independent units for conservation and management.
However, genetic discontinuities among populations were found in the northwest and southeast parts of the study area, corresponding
to regions of recent socio-economic expansion and high population density, respectively. Taking both geographic distances
and genetic discontinuities into account it is possible to establish a group of population to be conserved, covering most
of
D. alata geographic distribution and congruent with previously established priority areas for conservation in the Cerrado region.
Keywords Biodiversity -
Dipteryx alata Vogel - Cerrado - Conservation genetics - Genetic structure - Operational units - RAPD - Spatial autocorrelation