Fig. 1

Response of (a) Modified Rogers’ genetic distance (mrd), b number of polymorphic markers (variants, poly), c Expected Heterozygosity index (genetic diversity index, he), and d Shannon entropy index (shan), for six sample sizes (0, 5, 10, 20, 30, 40 and 50% of the size of the whole collection), two types of samples (independent: i, and nested: n), and two strategies for selecting the best sample (Core Hunter: CH, and D-method: DM). The response is expressed as the (sample value) / (collection value) ratio (red horizontal line). Blue lines represent different sized intervals of the distance from the collection value