Availability of short microsatellite markers from butterfly museums and private specimens

摘要

Knowledge of the temporal changes in genetic diversity and structure is important for identifying factors causing a decline in threatened insect species, and for establishing conservation programs for these species. Thus, there is recently an increasing interest in the restoration of genetic diversity in conservation programs using DNA data from historical museum specimens. For butterfly specimens, we measured the yields and fragment sizes of the extracted DNA and investigated the genotyping success probability of nine short microsatellite markers (allele size 73-191 bp). We used leg samples of specimens of a medium-sized butterfly species, Melitaea ambigua (Lepidoptera; Nymphalidae), collected from the 1960s to the 2010s. The yields of specimen-extracted DNA longer than 150 bp decreased with increasing specimen age. There were negative correlations between the genotyping success probability and specimen age for each of all microsatellite markers. A negative correlation was also observed between the genotyping success probability and allele size of each microsatellite marker. We conclude that short microsatellite markers and analysis of recently obtained specimens are particularly suitable for microsatellite analysis of butterfly specimens.