Vol. 19 No. 1
Evaluation of variations for phenotypic traits by multivariate techniques in sweet corn (Zea mays L. saccharata)
Author(s): S. CHAVAN, 1D. BHADRU, V. SWARNALATHA AND B. MALLAIAH
Abstract: An experiment was carried out in sweet corn (Zea mays L. saccharata) to estimate the extent of genetic diversity of 25 inbred lines in randomized block design (RBD) with two replications. Based on the observations of twelve yield and its attributing traits, four principal components (PCs) were created having eigen value of >1 and explaining 84.64% of total variation. In two dimensional biplot, three groups of traits were distinguished in regard to first and second principal components (PC1 & PC2) with angles between vectors exhibiting high positive correlation of cob weight with and without husk with traits such as number of kernels per row, ear diameter, ear length and plant height. The dendrogram developed by Hierarchical clustering using Ward’s method has assigned the inbred lines into six clusters, explaining the diverse nature of genotypes to assist in selection of parental material for further sweet corn breeding programmes.
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