Application of Cluster Analysis for Evaluation of new Bulgarian and Macedonian Cotton Varieties and Lines
Abstract
The aim of this study was to assess the genetic distance between elevenBulgarian and four Macedonian cotton varieties by applying the methodof cluster analysis. The trial was carried out in 2008 and 2009. The clusteranalysis based on the varieties of agronomic and fi ber technological propertiesconfi rmed the genetic differences between them. The varieties grouped intotwo basic groups depending on the breeding directions and breeding methods.Some varieties were genetically very similar and they could be includedin one breeding program for rapid breeding effect. The Macedonian varietiesand lines were genetically distant from some Bulgarian varieties and theirincluding in one breeding program can has a good effect. The year conditionshad infl uence on genetic similarity and genetic remoteness as a result ofpredetermination of genetic formulas controlling the traits. In Strumica thevarieties differentiated stronger in yield and lint percentage and weaker in fi berlength.References
Dimitrova, V., Stoilova, A., & Genov G. (2004a). Analysis of available genetic resources in cotton. Plant Science, (41), 499-503
Dimitrova, V., Stoilova, A., & Genov G. (2004b). Evaluation of cotton patterns by cluster analysis. Scientifi c conference with international participation “Stara Zagora ‘2004” Proceedings, vol. II Agrarian Sciences – Plant growing Part 2, Genetics, selection, weeds, diseases and wreckers. ISBN: 954-9329-09-7, Union of scientists, Stara Zagora, 86-90
Dimitrova, V., Stoilova, A., & Genov G. (2004c). Study on the genetic variability by fi bre length and lint percentage in Bulgarian and Foreign cotton patterns by applying of cluster analysis. Scientifi c conference, Kardjaly, October 2004, Scientifi c researches ISBN 954-9634-25-6, 262-266
Stoilova, A., & Dechev D. (2003). Clustering of cotton lines on their phenotype stability by applying the cluster analysis. Plant Science, (), 33-37
Stoilova, A., Valkova, N., & Genov G. (2005). Genetic remoteness of foreign cotton cultivars by some agronomic traits. Field Crops Studies, vol. ІІ, (2), 221-226
Kalsy, H.S., Gard H.R., Rathore, P. & Gill, J.S. (1995). Genetic divergence and heterosis in American cotton. Crop Improvement, 22, (2), 232-236
Patil, S.A., Salimath, P.M., Chetti, M.B., Patil, A.B., & Konda, C.R. (1999). Genetic divergence and heterosis in cotton. Crop Research Hisar, 18, (2), 226-229
Steven Brown, J., (1991). Principal component and cluster analyses of cotton cultivar variability across the U. S. Cotton Belt. Crop Science, vol. 31, July-October, 915-922
Tatineni, V., Cantrell, R. G., & Davis D. P., (1996). Genetic diversity in elite cotton germplasm determined by morphological characteristics and RAPD. Crop Science, 36, (1), 186-192
Ward, J. H. (1963). Hierarchical grouping to optimize an objective function. Journal of American Statistical Association, (58), 236-244.
