International Journal of Agriculture Extension and Social Development

author(s)
Vikky Kumar, NR Rangare, H Sahu and SK Bhariya

abstract
Potato is a tuberous crop, which is a good source of starch used as a dietary supplement and plays an important role in the Indian diet. Experiment was conducted in research cum instructional farm IGKV, Raipur (C.G.). The analysis of genetic variance revealed that there was significant genetic variability in the experimental materials. The genotypic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV) ranged from 24.76 to 6.90 and 25.29 to 11.2980, respectively. Highest GCV and PCV reported for Number of Compound leaves plant-1 (24.76, 25.29), Unmarketable tuber yield plant-1 (kg) (21.92, 22.895) and Fresh weight of shoot plant-1 (g) (20.454 21.011). High heritability coupled with high genetic advance was reported for number of total leaflets plant-1, Marketable tuber yield plant-1, Biological yield plant-1, Number of Compound leaves plant-1, Harvest index, Fresh weight of shoot plant-1, Plant height at maturity, Tuber yield plant-1, Plant emergence, Unmarketable tubers yield plant-1, Dry weight of shoot plant-1 and Number of tubers plant-1 Indicated presence of additive gene action in these traits. Divergences analysis grouped these genotypes in to six clusters, the inter-cluster distance was a higher than intra-cluster distance suggesting wider genetic diversity among the genotypes of different groups. The highest intra-cluster value was maximum in cluster II (6.00) and minimum in cluster I (4.19). The highest inter-cluster distance was between cluster III and V (12.371) indicated maximum exploitation of heterosis on hybridization. Two characters number of compound leaves plant-1and fresh weight of shoot plant-1 showed maximum contribution towards total divergences among different characters.