Abstract
The karyotypes of 21 samples of the genus Silene L. from the Mediterranean region, belonging to 10 species and 8 sections, have been investigated. Diploid chromosome numbers of 2n=24 are reported in S. succulenta, S. rubella, S. ligulata, S. biappendiuclata, S. alba, S. gallica and S. nocturna. In S. vulgaris both 2n=24 and 48 are recorded in different accessions. In addition 2n=20 is recorded in two accessions of S. conoidea, and 2n=30 in S. longipetala.Considerable variation in mean chromosome length was found. S. biappendiculata, S. succulenta have the longest chromosomes, while S. conoidea has the shortest chromosomes. The karyotypes are more or less similar with respect to centromere position, being composed of metacentric to submetacentric and acrocentric chromosomes.The cytological characteristics provide evidence for the separation of S. longpetala and to some degree S. conoidea from the rest of the species studied.
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