High level of genetic differentiation for allelic richness among populations of the argan tree [Argania spinosa (L.) Skeels] endemic to Morocco.

摘要: Genetic diversity at nine isozyme loci was surveyed in an endangered tree species, the argan tree, endemic to south-western Morocco. The species is highly diverse (3.6 alleles/locus) with populations strongly differentiated from each other (FST=0.25). This example used illustrate a method for standardizing measures of allelic richness samples unequal sample sizes, which developed estimation number and relies on technique rarefaction. In addition, it shown that measure subdivision, θST, obtained when place ofh (Nei's index diversity), much larger than FST [e.g. θST(40)=0.52, where (40) indicates specified estimate richness]. suggests rare alleles (which influence richness) have more scattered distribution frequent ones, result raises special conservation issues tree.