Analysis of genetic variability in six Tunisian wild cardoon (Cynara cardunculus L. subsp flavescens Wiklund) populations

摘要

A collection of six Tunisian wild cardoon (Cynara cardunculus L. subsp. flavescens Wiklund (syn. C. cardunculus var. sylvestris (Lam.) Fiori) populations was evaluated using nineteen morphological traits. Analysis of variance and correlation coefficient were performed based on XLSTAT version 2011 and principal components analysis using the past program. Significant differences between populations were noted for most morphological traits in four main groups. The first group, positively correlated to the two axes, is represented by "Zriba", the second group; including population of "Twirif" is positively correlated to the component 2 and negatively correlated to the component 1 while the third group, is composed of the populations of (Bahra and wad mliz) were positively and negatively correlated to the component 2 and component 1, respectively. Finally, the fourth group is negatively correlated to the two axes and is composed of the populations of (Enfidha and Bouficha). The dendrogram based on Nei's genetic distance using UPGMA method, show genetic drift between the studied populations.