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Spatial genetic structure of Stryphnodendron adstringens (MART.) COVILLE (Leguminosae-Mimosoideae) using SSR markers
© Zimback et al; licensee BioMed Central Ltd. 2011
- Published: 13 September 2011
- Spatial Autocorrelation
- Forest Fragment
- Sugar Cane
- Spatial Genetic Structure
- Forestry Sector
The forest fragments of Stryphnodrendron adstringens have disappeared because of the high rate of Brazilian Savannah deforestation for commercial purposes, such as eucalypt, citrus, soy bean, and sugar cane crops that have been intensely cultivated on those areas . Economically, S. adstringens is important for manufacture industries of paints and tanneries, but also is utilized for therapy against ulcer, scurvy, and for antiseptic and healing purposes . Considering the forestry sector, the species is potential for building uses because of their wood have high density and durability . Aiming for germplasm preservation and for breeding programs we studied the spatial genetic structure of S. adstringens based on SSR markers.
I = Moran's I index, which can take values between -1.0 (negative autocorrelation) and + 1.0 (positive autocorrelation);
n = number of individuals;
pi and pj = allele frequency for i and j individuals;
p = average of p;
Wij = element of symmetric matrix square and W were nxn dimensions, which is given the value 1 for individual neighbors and 0 otherwise;
W = matrix that expresses the spatial correlation between individuals and the sum over i and j is the value iqual W.
Correlogram using Moran's Index (D) with confidence interval (CI), probability of exclusion (P), number of comparisons (CN), and value indicating absence of spatial autocorrelation D = -0.0270 for Stryphnodendron adstringens.
Significant results were observed for the class distances from 0 to 33 meters and 99 to 132 meters, showing there is spatial autocorrelation for S. adstringens.
The authors thank FAPESP to provide financial funds to develop the study, CNPq and CAPES for scholarships.
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