Rhamnus glaucophylla Sommier is an endemic small tree or shrub belonging to sect. Eurhamnus. It grows on cliffs of the Apuan Alps and of the Lucca Apennine in Tuscany (Italy). ISSRs were used to detect the genetic diversity within and among five populations representative of the species distribution range. Moderate levels of genetic diversity were revealed as percentage of polymorphic band (PPB) both at the population (PPB = 22.63%, HS = 0.0801, Sh = 0.1193) and species level (PPB = 48.68%, HT = 0.1155, Sh = 0.1837). The correlation between genetic and geographic distances was not significant (Mantel test, r = 0.17; P<0.26). The information on the pattern of genetic variation obtained in this work bears important implications for conservation management, and in particular for ex situ conservation programmes involving long-term seed storage in seed banks.
Genetic structure of Rhamnus glaucophylla Sommier endemic to Tuscany
CASAZZA, GABRIELE;MINUTO, LUIGI
2011-01-01
Abstract
Rhamnus glaucophylla Sommier is an endemic small tree or shrub belonging to sect. Eurhamnus. It grows on cliffs of the Apuan Alps and of the Lucca Apennine in Tuscany (Italy). ISSRs were used to detect the genetic diversity within and among five populations representative of the species distribution range. Moderate levels of genetic diversity were revealed as percentage of polymorphic band (PPB) both at the population (PPB = 22.63%, HS = 0.0801, Sh = 0.1193) and species level (PPB = 48.68%, HT = 0.1155, Sh = 0.1837). The correlation between genetic and geographic distances was not significant (Mantel test, r = 0.17; P<0.26). The information on the pattern of genetic variation obtained in this work bears important implications for conservation management, and in particular for ex situ conservation programmes involving long-term seed storage in seed banks.
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