Morphological characterization and evaluation of soybean genotypes under rainfed ecosystem of Nepal

Abstract

Morphological description of soybean genotypes useful in soybean improvement program. The objective of this research was to identify genotypes with high grain yield and desirable agronomic traits as well as stability across environments. A set of 25 soybean genotypes were used to evaluate under alpha lattice design with two replications at research farm of National Oilseed Research Program, Nawalpur, Sarlahi; National Grain Legumes Research Program Khajura, Banke, and Institute of Agriculture and Animal Science, Sundarbazar, Lamjung during July to November of 2018. Result showed that soybean accessions exhibited morphological variation in qualitative traits. The soybean landrace Kailali-3 had a significantly higher grain yield (1.7 ton ha-1). The result of GGE biplots indicated Kavre, Kailali-3 and Lekali Bhatta as the most stable genotypes in all environments. CO 164 was the highest-yielding genotype with above mean average yield at all tested environments. On the other hand, additive main-effects and multiplicative interaction (AMMI) Analysis revealed Chitwan-9 and Palpa white as the most stable due to the low IPC1 scores and moderate mean yield.

Keywords

• Soybean accession
• Stability analysis
• AMMI model
• G x E interaction etc