title: Genetic variability in Hesperozygis ringens Benth. (Lamiaceae), an endangered aromatic and medicinal plant of southern Brazil.
abstract: Hesperozygis ringens Benth. (Lamiaceae) is an aromatic and medicinal plant, characterized by a high concentration of isopulegone; it is endemic to the mountains of southeast Rio Grande do Sul, Brazil, and currently is considered endangered. The present study evaluated the intra- and interpopulation genetic variability of H. ringens by means of RAPD and ISSR molecular markers. The results showed that H. ringens populations are genetically structured, with low gene flow between populations, confirming the fragmentation imposed by anthropic action. Populations from the two areas of occurrence are genetically different. Low intrapopulation variability and heterozygosity were detected, indicating genetic drift and inbreeding. Based on the data, conservation strategies are discussed.
authors.affiliation: Instituto de Biotecnologia, Universidade de Caxias do Sul, R Francisco Getúlio Vargas 1130, Caxias do Sul, 95001-970, RS, Brazil.
authors.forename: Fernando
authors.initials: F
authors.lastname: Fracaro
authors.forename: Sergio
authors.initials: S
authors.lastname: Echeverrigaray
mesh_terms: D001483:Base Sequence; D001938:Brazil; D017931:DNA Primers; D018744:DNA, Plant / Q000235:genetics / Q000302:isolation & purification; D014644:Genetic Variation; D006579:Heterozygote; D019686:Lamiaceae / Q000235:genetics*; D019105:Random Amplified Polymorphic DNA Technique
chemical_list: D017931:DNA Primers; D018744:DNA, Plant