Manoj Kandel⁽¹⁾ and Jiban Shrestha*⁽²⁾

(1). Nepal Agricultural Research Council, Hill Crops Research Program (HCRP), Baiteshwor-4, Kabre, Dolakha, Nepal.

(2). Agriculture Botany Division, Nepal Agricultural Research Council, Khumaltar, Lalitpur, Nepal.

(*Corresponding author: manojkandel24@gmail.com).

Received: 23/08/20219                               Accepted: 05/09/2019

Abstract

Stability analysis is an important step in developing cultivars. Seven buckwheat genotypes were evaluated at hilly regions of Nepal namely Dolakha, Ramechhap, Solukhumbu, Kaski, Dailekh, Surkhet, Jumla and Doti districts during winter seasons of 2017 and 2018 using randomized complete block design with three replications to identify stable and high yielding genotypes. The genotype × environment interaction for grain yield was significant (P≤0.05). The genotypes ACC#2227-1 (1.62 t/ha) and ACC#2223-1 (1.52 t/ha) were found higher sensitive to environment and produced higher mean grain yield across the locations. Joint regression analysis showed that genotypes ACC#2227-1 and ACC# 2223-1 had regression coefficient of 1.41 and 1.33, respectively. The coefficient of determination (R²) for genotypes, ACC#2227-1 and ACC#2223-1 were higher. The GGE biplot analysis showed that ACC#2227-1 and ACC#2223-1 were more stable and adaptive across the locations; therefore, they can be taken for general cultivation.

 Keywords: Buckwheat, G×E interaction, Stability, Grain yield.

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