Vol. 9, Special Issue 10, Part R (2025)

The present study was carried out during the Rabi season of 2024-25 at the Research and Instructional Farm, College of Agriculture, IGKV, Raipur under AICRP-Potato. 13 genotypes, including three checks (Kufri Chipsona-1, Kufri Surya and Kufri Khyati), were evaluated in a randomized block design with three replications at 75 and 90 days after planting (DAP). Data on 15 agronomic traits were recorded to assess genetic variability, heritability and genetic advance for yield-associated traits. Significant genotypic differences were observed for most traits, with phenotypic variation exceeding genotypic variation, indicating moderate environmental influence.

At 75 DAP, dry weight of tubers plant⁻¹ showed the highest PCV (36.15%) and GCV (34.76%), while at 90 DAP, dry weight of shoots plant⁻¹ exhibited the highest PCV (37.00%) and GCV (35.84%). High heritability was observed for fresh weight of shoots plant⁻¹, dry weight of tubers plant⁻¹ and dry weight of shoots plant⁻¹ at 75 DAP, whereas at 90 DAP it was recorded for fresh weight of shoots plant⁻¹, dry weight of shoots plant⁻¹ and marketable tuber yield (t ha⁻¹).

Tuber yield was positively correlated with number of leaves plant⁻¹, number of compound leaves plant⁻¹, dry and fresh tubers weight plant⁻¹ at 75 DAP, while at 90 DAP it was associated with dry and fresh tubers weight plant⁻¹, number of primary branches plant⁻¹ and plant height. Path analysis revealed that fresh weight tubers plant⁻¹, plant emergence and tuber girth had the strongest direct effects at 75 DAP, whereas dry weight of tubers plant⁻¹, number of leaves plant⁻¹ and number of primary branches plant⁻¹ were most influential at 90 DAP. These traits provide guidance for selecting promising high-yielding genotypes based on their phenotypic performance, as they are minimally influenced by the environment, with potential for future improvement in potato.