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Principal component analysis of variation pattern among Cola nitida, Cola acuminata (Sterculiaceae) and their interspecific hybrids
Author(s) -
Adebola P. O.
Publication year - 2000
Publication title -
feddes repertorium
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.24
H-Index - 25
eISSN - 1522-239X
pISSN - 0014-8962
DOI - 10.1002/fedr.20001110312
Subject(s) - biology , hybrid , principal component analysis , botany , twig , interspecific hybrids , sterculiaceae , horticulture , interspecific competition , bract , inflorescence , mathematics , statistics
Morphological variation among selected accessions of Cola nitida (Vent.) Schott & Endl., C. acuminata (P. Beauv.) Schott & Endl. and their interspecific hybrids were studied at Cocoa Research Institute of Nigeria, Ibadan using Principal Component Analysis (PCA) and Average Cluster Linkage Analysis (ACLA). Measurements were taken on 30 vegetative and floral characters and the data obtained were subjected to statistical analysis. The results from both methods showed that the three groups of plants were morphologically similar but separable. The PCA revealed that the first five principal component axes accounting for 71.78% of the total variation with the first two axes accounting for 31.93% and 18.72% respectively. The major characters which account for the variation among the two species and their hybrids were peak flowering period, leaf shape, tree height, number of primary leaf veins, proportion of female flowers, leaf blade length and extent growth of twig.