Inter-genotypic distance in upland cotton

Abstract

Inter-genotypic distances were studied in ten upland cotton genotypes following Non-hierarchical clustering and Principal Co-ordinate (PCO) analysis to select parents for hybridization. The genotypes formed three groups. Group-I contained three genotypes* DPL-16, DPL-15 and DPL-16. The genotypes, DPL-15, DPL-20, DPL-41 and DPL-80 constituted the Group-II. Cluster-Ill consisted of three genotypes, viz. DPL-15, DPL-90 and BDR (91)3. Group-Ill produced the highest value for- seed cotton yield per plant, bolls per plant, total number of sympods per plant and the lowest valur for- days to first flower and days to first boll burst. The genotype, DPL-50 was found the earliest and distant from most of the genotypes, particularly from the members of the Group-Ill. The diverged genotypes, BDR(91)3, DPL-51, DPL-90 and DPL-50 may be selected for future hybridization program.