Evaluation of Groundnut Genotypes for Yield and Yield Attributing Traits through Genotype by Trait Biplot Analysis

Abstract

The evaluation of genotypes based on multiple traits is very important to select stable varieties for breeding programs. Therefore, this study was conducted to understand the genotype x trait interaction on nine promising groundnut genotypes in a randomized complete block with three replications at the research block of Agricultural Research Station, Belachapi, Dhanusha, Nepal during the two successive seasons of 2019 and 2020 using genotype by trait biplot method. Combined analysis of variance showed that the genotypes and genotype x interaction were significantly (P ≤ 0.01) different for most of the studied traits. The first two principal components (PC1 and PC2) accounted for 72.51% of the total variation in genotypes. GT biplot analysis showed that the number of pods per plant, 100 seeds weight, and harvest index were the most influencing traits to select genotypes for high yield. Moreover, genotype ranking indicated ICGV 07214 and ICGV 05155 genotypes were superior and stable genotypes based on yield and other traits. So, this study suggests that these genotypes could be used as parental lines or as pure lines for the development of new varieties.