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Plant Science Today (PST)

Research Articles

Vol. 13 No. 3 (2026)

Characterisation and evaluation of Solanum andigena genotypes for yield, maturity and processing quality under the Indo-Gangetic Plain

DOI
https://doi.org/10.14719/pst.16186
Submitted
18 June 2026
Published
15-09-2026 — Updated on 30-09-2026
Versions

Abstract

Analysis of the relationships between yield and its component characters provides valuable insights for formulating effective selection strategies, thereby increasing the efficiency of crop improvement programs. An investigation involving 18 potato (Solanum andigena) genotypes was undertaken to assess the relationships among eight morphological and four biochemical traits to quantify their direct and indirect contributions to tuber yield in potato. The present study was conducted at the Potato Research Farm, Tirhut College of Agriculture, Dholi, Bihar, during the rabi seasons of 2023 and 2024. The pooled data across two crop seasons were subjected to analysis of variance (ANOVA), which revealed significant variation among the studied traits. The correlation coefficient analyses demonstrated that tuber weight per plant, the principal yield attribute, exhibited strong and positive associations with number of tubers per plant (rg = 0.517**), tuber dry matter content (rg = 0.513**), number of compound leaves (rg = 0.4448**), plant height (rg = 0.5867**) and plant emergence (rg = 0.4058**), thereby confirming their critical role in yield determination under Indo-Gangetic Plain conditions. Path analysis further revealed that number of tubers per plant and number of compound leaves exerted the highest positive direct effects on tuber weight per plant, along with substantial favourable indirect effects via plant height, tuber dry matter and plant emergence, indicating their importance in yield enhancement in potato. Diversity analysis identified seven clusters where Cluster III genotypes JEXA75, JEXA456, JEXA52, JEXA132, JEXA805, Kufri Girdhari, Kufri Jyoti represent promising parental material for breeding programs aimed at enhancing productivity and processing traits. Cluster V genotypes JEXA30, JEXA1181 used for early maturing varieties breeding program.

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