Classificatory analysis of potato (Solanum tuberosum L.) Genotypes for yield and yield attributing traits

An experiment with forty four genotypes of potato was conducted under AICRP-Potato in the Horticultural Research Farm, College of Agriculture, Indira Gandhi Krishi Vishwavidyalaya, Raipur (C.G.) during Rabi season of 2006-07. Potato genotypes were grown in Randomized Complete Block Deign with three replications planted on November 2006. The analysis of genetic variance revealed that the sufficient variability was present in genotypes. The Phenotypic coefficient of variation (PCV) was slightly higher than genotypic coefficient of variation (GCV) for all the parameters. The high heritability (broad sense) was recorded in fresh weight of shoots plant-1, harvest index (%), tuber dry matter plant-1, plant emergence, total number of leaves plant-1, fresh weight of tubers plant-1, total yield plot-1 and plant height. The high heritability estimates coupled with high genetic advance was recorded for total tuber yield (kg plot-1). The tuber yield showed positive and highly significant association with marketable tuber yield plant-1. Whereas total tuber yield plant-1 was positively correlated with plant emergence (%), number of tubers plant-1 and fresh weight of tubers plant-1. Path coefficient analysis revealed that marketable yield plot-1, plant height and number of tubers plant-1 had high positive and direct influence on total tuber yield. On the basis of D2 analysis all the genotypes were grouped into five clusters and the D2 value noted for different parameters indicated the presence of appreciable genetic diversity. Genetic diversity study suggested that genotypes namely J/93-86, MS/95-1309, J/95-227, MS/92-3146, K. Chipsona-3, and MP/97- 637 possessed high per se performance. Thus, these genotypes may be included as parents in hybridization programme for getting superior hybrids and segregants suitable for Chhattisgarh.