Abstract
Abstract To obtain better insight in evolutionary processes, data on genetic diversity are compared with data obtained by more traditional biosystematic methods. Altogether, ten isozymes in 25 populations of Lobularia, Cruceferac, from Spain, Morocco, the Salvage Islands, the Canary Islands and the Cape Verde Islands were screened by starch gel electrophoresis. Genetic identities between pairs of species were low: 0.582 for canariensislibyca, 0.603 for canariensis-maritima, and 0.403 for libyca-maritima. These species are biological species, i.e. isolated by strong internal crossing barriers. The isozyme data indicate that speciation is an old event in the genus. The nine subspecies of the L. canariensis complex are interfertile and isolated by ecogeographical barriers. Among the subspecies, the genetic identities ranged from 0.476 to 0.846, with a mean identity of 0.734 for all pairs. Among 22 populations of L. canariensis, irrespective of taxon, the identities ranged from 0.456 to 0.961, with a mean of ...
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