PCA analysis.

<p>Two-dimensional PCA plot depicting the distribution of accessions over the first two PCs. Different colours represent the four groups of pears: international cultivar varieties (ICV, red squares), national cultivar varieties (NCV, orange dots), local varieties (LV, green crosses), and wild related species (RS, blue triangles). RS are further subdivided into <i>P</i>. <i>pyraster</i> (filled triangles) and <i>P</i>. <i>amygdaliformis</i> (empty triangles).