SciELO - Scientific Electronic Library Online

vol.16 issue2The molecular characterization of a cyclophilin A from Chinese mitten crab Eriocheir sinensis and the antifungal activity of its recombinant proteinModeling the kinetics of pyrite ash biodesulfurization by Saccharomyces cerevisiae and Acetobacter aceti in liquid state bioreactors author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Electronic Journal of Biotechnology

On-line version ISSN 0717-3458


POMPONIO, María F et al. DNA sequence variation of drought-response candidate genes in Austrocedrus chilensis. Electron. J. Biotechnol. [online]. 2013, vol.16, n.2, pp.3-3. ISSN 0717-3458.

Background: Austrocedrus chilensis (D. Don) Pic. Ser. et Bizzarri commonly known as Patagonian cypress is a member of the Cupressaceae family, characterized by a high adaptive potential for growing in marginal areas and good timber quality. The species grows over a wide area and under a wide range of rainfall. This study assessed adaptive genetic variation at SNP level in candidate genes involved in response to drought stress. Results: A total of 18 single nucleotide polymorphisms (SNPs) were found among 1,428 bp. Average nucleotide diversity value (π = 0.00312) was similar to those previously reported in other Cupressaceae. The Fst average among genes and populations was 0.163 and the lowest differentiation was observed in continuous and humid populations. A number of neutrality tests were applied to find evidence of positive selection in our candidate gene set, but only AcAQP2 gene in Pedregoso and San Ramón populations revealed significant departures from neutrality with positive values suggesting balancing selection. Conclusions: In this study we report the levels of nucleotide diversity searched in some drought stress candidate genes in Austrocedrus chilensis and the selective factors that may be acting on this species.

Keywords : adaptive variation; balancing selection; Patagonian cypress; single nucleotide polymorphisms (SNPs).

        · text in English     · English ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License