Agricultural University, BG – 4000 Plovdiv, Bulgaria
ROYTCHEV, V., 2009. Application of cluster analysis and principal component analysis in palynobiometric studies of seedless cultivars and hybrid vine forms (Vitis vinifera L.). Bulg. J. Agric. Sci., 15: 31-40
The application of cluster analysis and principal component analysis in palynobiometric studies of 70 seedless cultivars and hybrid vine forms has been researched. It has been established that, depending on the studied cultivars’ genetic similarity and remoteness, the most influential in their division into six larger groups are the most significantly varying indices from the pollen aperture complex - colp length, mesocolpium, colp width, equatorial axis and polar axis. There is a lack of discretion as regards the type of seedlessness, since cultivars with stenospermo-karpic and stimulation parthenokarpy are positioned in one and the same group. The phenotype-palynological differentiation allows the use of the main aperture characteristics for the purposes of intraspecific taxonomy and ampelographic identification of seedless vine cultivars.