Diversity and spatial genetic structure of natural populations of Ziziphus joazeiro Mart

This study aimed to characterize the genetic diversity and spatial genetic of natural populations of Ziziphus joazeiro using molecular markers. Twelve ISSR markers were used in 77 individuals, distributed between two populations located in the state of Ceara, Brazil. The set of markers generated 220 polymorphic loci for the "Nao me Deixes" population (Pop 1) and 74 loci for the "Triunfo" population (Pop 2). The results indicated a higher genetic diversity among individuals of the Pop 2. According to the analysis of molecular variance, most genetic diversity occurred within the populations (59.49%). There was no spatial genetic structure among individuals the Pop 1 population. In contrast, the Pop 2 population presented spatial genetic structure up to the first distance class (132 m). Due to the observed genetic variation, both populations present potential for seed collection and seedling formation to be used in restoration area and genetic conservation programs.