Evaluation of growth parameters and yield variation in field pea genotypes

Abstract

Legumes, particularly field pea (Pisum sativum L.), are vital for human nutrition and animal feed due to their high protein content. However, their production is often limited by reduced light levels, especially when grown as intercrops. This study aimed to evaluate the variation in growth parameters among different field pea genotypes to identify superior varieties under diverse conditions. Conducted using a randomized complete block design (RCBD) with three replications, the experiment measured specific leaf weight (SLW), net assimilation rate (NAR), absolute growth rate (AGR), crop growth rate (CGR), and relative growth rate (RGR) across various growth stages. Results indicated significant genotype differences in growth parameters. IC381455 exhibited the highest CGR (6.85 g m⁻² day⁻¹) and AGR (0.548 g day⁻¹) during early growth stages and maintained high NAR (0.0767 mg dm⁻² day⁻¹) and RGR (0.0722 g g⁻¹ day⁻¹). In contrast, Nippani local-2 showed the lowest CGR, RGR, and seed yield per plot (454 g). The study highlights that high CGR, RGR, and NAR are positively correlated with seed yield, suggesting that genotypes with these traits are more productive. Notably, IC381455, IPFD6-3, and Rachana demonstrated high yield potential, indicating their suitability for cultivation under varying conditions. These findings contribute valuable insights into selecting field pea genotypes with superior growth and yield characteristics, which is essential for improving production efficiency.