ANALYSIS FOR YIELD AND YIELD COMPONENTS OF WHEAT GENOTYPES UNDER IRRIGATED CONDITIONS IN MID-WESTERN TERAI OF NEPAL

Abstract

With the objective of identifying high yielding wheat varieties for irrigated condition of midwestern region of Nepal, Coordinated Varietal Trials (CVT) of wheat were planted under irrigated conditions at Regional Agriculture Research Station (RARS) Khajura in winter season of 2011/12 and 2012/13.  Trials were planted in Randomized Complete Block Design (RCBD) and recommended cultivation practices were followed. Various phenological, morphological and yield attributing traits were recorded. Obtained data of both years were analyzed by using MSTATC software program. Correlation and path analysis for yield was conducted by using SPSS and MS-Excel. Combined analysis over year indicated highly significant differences among the genotypes in terms of days to heading, days to maturity, thousand kernels weight, grain yield and straw yield. The difference was significant for plant height but non-significant in terms of grains per spike. Among the tested entries included in the experiment, NL 1135 had late heading and maturity. In contrast, genotype BL 3978 was earliest. Genotype Gautam was obtained to be tallest and Thousand kernels weight was obtained highest in genotype BL3978. Grain yield was obtained significantly high over the years in NL1094 followed by NL 1135. Maximum straw yield was obtained in genotype NL 1094 followed by NL1135. Correlation coefficient computation showed that days to maturity had highest positive correlation (0.684**) with days to heading. Path analysis for yield revealed that thousand kernels weight had the highest positive value (0.732681) as compared to direct effect of other traits.