Isozyme uniformity in a wild extinct insular plant, Lysimachia minoricensis JJ Rodr. (Primulaceae)

Isozyme analyses were conducted to evaluate the genetic diversity of seed a ccessions of Lysimachia minoricensis (a Balearic endemic plant that became extinct in the wild) provided by 10 European botanical gardens. No isozyme variation was detected after examination of the electrophoretic patterns of 22 putative loci in more than 150 plants. The lack of genetic variation in L. minoricensis is probably due to the shortage of sample propagules origi nally recovered in the field before its extinction. Extant plants of L. min oricensis are believed to have originated from a single source, therefore l imiting their use as seed stocks for restoration projects.