Stability analyses of red kernel rice landraces of Tamil Nadu based on AMMI and GGE biplot methods.

Thirty-four red kernel rice genotypes along with two check varieties were evaluated across three different locations of Tamil Nadu viz., Coimbatore, Paiyur and Aduthurai during Kharif 2022 to assess the stability of the genotypes for single plant yield. The AMMI and GGE models were used to study the interaction between the genotypes and the environment in order to select the stable genotypes. Significant differences among the genotypes and the environment revealed the existence of variations among the genotypes and also environmental influence over the genotypes for single plant yield. Considering the overall average single plant yield performances, the genotype Rangoon samba recorded the highest single plant yield over the check varieties, while the genotype Karuthakar had the lowest single plant yield. The genotypes G24 (Thooyala), G25 (Kothamalli samba) and G34 (IG74 Check) recorded higher stable single plant yield across locations. Based on AMMI and GGE stability models, these three genotypes were identified to be highly stable over environments with less G x E interaction and these genotypes can be recommended for cultivation across the environments to obtain a higher single plant yield. [ABSTRACT FROM AUTHOR]