Spatial genetic structure

Effect of selective logging on genetic diversity and gene flow in Cariniana legalis sampled from a cacao agroforestry system

J. B. Leal, Santos, R. P., and Gaiotto, F. A., “Effect of selective logging on genetic diversity and gene flow in Cariniana legalis sampled from a cacao agroforestry system”, vol. 13, pp. 626-635, 2014.

The fragments of the Atlantic Forest of southern Bahia have a long history of intense logging and selective cutting. Some tree species, such as jequitibá rosa (Cariniana legalis), have experienced a reduction in their populations with respect to both area and density. To evaluate the possible effects of selective logging on genetic diversity, gene flow, and spatial genetic structure, 51 C. legalis individuals were sampled, representing the total remaining population from the cacao agroforestry system.

Fine-scale spatial genetic structure of an endangered marsh herb, Caldesia grandis (Alismataceae)

X. - L. Yue, Chen, J. - M., Guo, Y. - H., and Wang, Q. - F., “Fine-scale spatial genetic structure of an endangered marsh herb, Caldesia grandis (Alismataceae)”, vol. 11, pp. 2412-2421, 2012.

The endangered marsh herb, Caldesia grandis, is native to China. We investigated the spatial structure of the genetic variation of three populations of C. grandis using RAPD markers and spatial autocorrelation analysis, based on the method of equal distance interval. A total of 157 individuals were sampled from four patches collected from the region of Hunan and Yunnan Provinces, China.

Genetic structure based on nuclear and chloroplast microsatellite loci of Solanum lycocarpum A. St. Hil. (Solanaceae) in Central Brazil

K. Martins, Chaves, L. J., Vencovsky, R., and Kageyama, P. Y., “Genetic structure based on nuclear and chloroplast microsatellite loci of Solanum lycocarpum A. St. Hil. (Solanaceae) in Central Brazil”, vol. 10, pp. 665-677, 2011.

Solanum lycocarpum (Solanaceae) is a woody species found in the Brazilian Cerrado. The flowers are pollinated by Xylocopa spp bees, and seeds are dispersed by mammals with distinct home range sizes. As a consequence, relative contributions of pollen and seeds to overall gene flow can vary according to different spatial scales. We studied the genetic structure of four natural populations of S. lycocarpum separated by 19 to 128 km, including individuals located along dirt roads that interlink three of the populations.

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