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The correlation studies conducted in thirty diverse genotypes of potato (Solanum tuberosum L.). the analysis of correlation coefficient revealed that the magnitude of genotypic correlation was higher than phenotypic correlation for most of the characters and observed that the weight of ‘B’ grade tubers per hill (g), number of tubers per hill, number of ‘B’ grade tubers per hill, number of ‘C’ grade tubers per hill, weight of ‘C’ grade tubers per hill (g) and number of ‘A’ grade tubers per hill while number of ‘D’ grade tubers per hill and weight of ‘D’ grade tubers per hill (g) were significantly and positively associated with yield of tubers per hill. On the other hand, path analysis studies exhibited that the maximum positive direct effect on yield of tubers per hill was exerted by number of tubers per hill, number of ‘D’ grade tubers per hill, weight of ‘C’ grade tubers per hill (g), number of ‘B’ grade tubers per hill, number of ‘A’ grade tubers per hill, number of leaves per plant, number of eyes per tuber and plant height (cm) at genotypic level. Based upon correlation and path analysis, weight of ‘B’ grade tubers per hill (g), number of tubers per hill, number of ‘B’ grade tubers per hill, number of ‘C’ grade tubers per hill, weight of ‘C’ grade tubers per hill (g) and number of ‘A’ grade tubers per hill while number of ‘D’ grade tubers per hill and weight of ‘D’ grade tubers per hill (g) could be reliable selection parameters for improvement of potato.

international journal of chemical studies

Correlation and path coefficient analysis for yield and components traits in different genotypes of potato (Solanum tuberosum L.) under Eastern Uttar Pradesh condition