Genetic Diversity of Mexican Oregano Lippia berlandieri Schauer, from the Chihuahuan Desert Area

Abstract

Genetic Diversity of Mexican Oregano [Lippia berlandieri] Schauer, from the Chihuahuan Desert Area

The Mexican oregano [Lippia berlandieri] Schauer is widespread in Mexico. Several studies have involved the characterization of its essential oil in order to use it as food additive and for medical aims, as well as its antimicrobial and antioxidant capacity, although there is a lack of information about genetic diversity of this species. In order to increase [Lippia berlandieri] Schauer application, knowledge of the genetic characteristics of the species and creation of a program for germplasm conservation seem to be essential. This study was carrying out in order to understand the population genetics of [Lippia berlandieri] Schauer. Oregano seeds were collected from 8 locations of the Chihuahua Southeastern desert area. The results showed high genetic variability among oregano populations suggesting that this species is mainly allogamous, pollinated mainly by insects because of the attractive flower color; AMOVA showed genetic differences within and among populations, the last one was found approximately 5 times higher than the genetic differences within populations. The analysis of the Wright's statistics, especifically F[IS], supported the hypothesis that plants are not self-pollinating. On the other hand, it was found that the number of plants per a sample recommended for further genetic analysis of this specie is 13 or more.