Isozyme analyses were conducted to evaluate the genetic diversity of seed accessions 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 originally recovered in the field before its extinction. Extant plants of L. minoricensis are believed to have originated from a single source, therefore limiting their use as seed stocks for restoration projects.
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