Vol. 5, Issue 4 (2017)
Genetic divergence studies in mid-season cauliflower (Brassica oleracea var. botrytis L.) through Principal Component Analysis (PCA) and D2 analysis
Author(s): Vivek Kumar, Dhirendra Kumar Singh, Ankit Panchbhaiya and Neeraj Singh
Abstract: The present study was undertaken at Vegetable Research Centre, G.B. Pant University of Agriculture and Technology, Pantnagar, Udham Singh Nagar (Uttarakhand) during September- December, 2015. Fifty seven genotypes of cauliflower were grown in Augmented Block Design II including five checks which were arranged in four blocks with eighteen genotypes in each block inclusive of five checks. The study was primarily focused on assessing Principal Component Analysis (PCA) and D2 analysis. Genetic diversity plays an important role in plant breeding because hybrids between lines of diverse origin generally display a great heterosis than those between closely related strains. Geographical diversity may not be the only factor responsible for causing genetic diversification, thus focus should be laid on selecting the parents based on genetic diversity rather on geographical diversity. The Eigen root of first principal component was accounted approximately 45.696% of total variation. The first five PC axes explained 81.72% of the variation, suggesting considerable diversity among the genotypes for all the characters. Based on cluster analysis, the results revealed maximum inter-cluster distance between cluster IV and VII followed by cluster IV and VIII, thereby paving the chance for them to be used in hybridization breeding programmes.
Pages: 989-993 | 883 Views 53 Downloads
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How to cite this article:
Vivek Kumar, Dhirendra Kumar Singh, Ankit Panchbhaiya, Neeraj Singh. Genetic divergence studies in mid-season cauliflower (Brassica oleracea var. botrytis L.) through Principal Component Analysis (PCA) and D2 analysis. Int J Chem Stud 2017;5(4):989-993.
