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Table 5 Genetic diversity within the three main clusters identified by the STRUCTURE analysis at K = 4a

From: Loss of genetic diversity as a signature of apricot domestication and diffusion into the Mediterranean Basin

  Cluster size H o 1/ H o 2 H e 1 / H e 2 A r 1,c / A r 2,c A pr 1,c / A pr 2,c
Cluster 1 39 0.583 / 0.572 0.653 / 0.645 7.747 / 7.625 2.954 / 2.961
Cluster 3 58 0.548 / 0.543 0.568 / 0.559 4.164 / 4.004 0.198 / 0.203
Cluster 4 63 0.444 / 0.437 0.508 / 0.503 4.527 / 4.505 0.504 / 0.497
P (Cluster 1 vs. 3)   0.621 / 0.757 0.069 / 0.073 10-6$$$ / 8.3 10-7$$$ 4 10-9$$$ / 4.7 10-9$$$
P (Cluster 1 vs. 4)   0.037$ / 0.048$ 0.018$ / 0.027$ 7 10-6$$$ / 1.6 10-5$$$ 9 10-9$$$ / 9 10-9$$$
P (Cluster 3 vs. 4)   0.055 / 0.059 0.388 / 0.458 0.409 / 0.332 0.008$$ / 0.008$$
  1. a Cluster 2 was not taken into account in the genetic diversity analysis because of its limited size (seven individuals; Figure 2).
  2. H o observed heterozygosity; H e expected heterozygosity; A r allelic richness; A pr private allelic richness.
  3. 1 computed based on all SSR loci used in this study (25 loci); 2 computed based only on 24 SSR loci under the assumption of neutrality.
  4. c standardized at maximum value G = 53 individuals per cluster.
  5. Probability of independency between two clusters using the two-tailed Mann-Whitney’s U test. $P < 0.05; $$P <0.01; $$$P < 0.001.