Landscape conservation genetics of Dipteryx alata (‘‘baru’’ tree: Fabaceae) from Cerrado region of central Brazil
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2008
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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 amongpopulation
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.
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Biodiversity, Dipteryx alata Vogel, Cerrado, Spatial autocorrelation, Conservation genetics, Operational units, Genetic structure, RAPD
Citação
SOARES, Thannya Nascimento et al. Landscape conservation genetics of Dipteryx alata (“baru” tree: Fabaceae) from Cerrado region of central Brazil. Genetica, Gravenhage, v. 132, p. 9-19, 2008.