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. 2020 Oct 15;15(10):e0240665. doi: 10.1371/journal.pone.0240665

Fig 2. Genetic structure of the Vitis germplasm accessions obtained on the basis of 17 microsatellite markers.

Fig 2

Bar graphs of the estimated membership proportions (q) for each of the 410 accessions. Each accession is represented by a single vertical line, which is partitioned into colored segments in proportion to the estimated membership in each cluster. (A) First round of STRUCTURE analysis, inferred genetic structure for K = 3. Cluster 1 (C1): genetic predominance of the species V. vinifera; cluster 2 (C2): genetic predominance of the species V. labrusca; cluster 3 (C3): genetic predominance of wild Vitis species; Admixture: interspecific hybrids with a membership of q < 0.70. (B) Second round of STRUCTURE analysis. WG: wine grape accessions related to V. vinifera; TG: table grape accessions related to V. vinifera; NG: ‘Niagara’ accessions; IS: ‘Ives’ and ‘Isabella’ accessions; L1 and L2: Others V. labrusca hybrids; WV: accessions related to wild Vitis species; VR: V. rotundifolia accessions; SS: accessions related to the Seibel series; OH: complex interspecific hybrids.