Zusammenfassung
Molecular markers such as AFLPs are frequently applied in molecular ecology and conservation genetics to determine the genetic diversity of plant populations. However, despite the extensive utilization there is little consensus about the number of loci and individuals which should be used to estimate genetic diversity. As a consequence, these two parameters strongly vary among investigations. In ...
Zusammenfassung
Molecular markers such as AFLPs are frequently applied in molecular ecology and conservation genetics to determine the genetic diversity of plant populations. However, despite the extensive utilization there is little consensus about the number of loci and individuals which should be used to estimate genetic diversity. As a consequence, these two parameters strongly vary among investigations. In our study we analysed the impact of loci and individual number on the determined level of genetic diversity of 15 calcareous grassland species using AFLP. We investigated curve progressions of genetic diversity with an increasing number of individuals and computed the appropriate number of loci and plant individuals to reach 90% and 95% of a population's genetic diversity. According to our results approximately 120 loci are sufficient for a stable estimation of genetic diversity. Regarding the number of analysed individuals on average about 14 samples are needed to cover 90% and about 23 samples are needed to cover 95% of the total genetic diversity. Wind-pollinated species require, however, larger sample sizes than insect-pollinated species. Since funding is often limited, especially in conservation, our results may help to avoid time-consuming and costly surveys and may contribute to a more efficient use of the financial resources available for the determination of genetic variation.
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