Evaluation and identification of stable and high yielding genotypes for varietal development in amaranthus (Amaranthus hypochondriacus L.) under hilly region of Nepal
Manoj Kandel | Tritha Raj Rijal | Bishnu Prasad Kandel
Evaluating amaranthus genotypes in different locations is a key task for amaranthus improvement programs. Generally, at the farmers' level steady and high yielding genotypes that were identified are recommended for cultivation. For this purpose, 13 amaranthus genotypes were subjected to stability analysis to determine the nature and extent of genetic stability for three consecutive years viz 2018, 2019 and 2020 across two locations, Dolakha; and Jumla for grain yield and yield components. A randomized complete block design (RCBD) was used in this study with two replications for the identification of stable and high yielding genotypes. Genotype and environment (G × E) interactions and stability analyses were performed for yield and yield components in a particular location. The results showed that genotype (G), environment (E) and their interaction (G × E) at a 0.05% probability level of 0.05, significantly influenced the grain yields of amaranthus genotypes. Genotypes ACC#10 (bi = 1.16) and ACC#2 (bi = 1.81) with more than unity regression indicated the genotype's suitability for favorable conditions. As shown by the GGE biplot, the under-tasted environment genotype ACC#10 was stable. Thus, to improve the production of amaranthus in the mid hill environments of Nepal, this genotype was put forward for release as a variety.
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