Correlation and path analysis of grain yield and some of its components in perspective lines oat

Abstract

The present study was undertaken with the objective to determine the association between yield and its component characters and their direct and indirect effects on grain yield in perspective winter oat lines (Avena sativa L.). The study was conducted at the Institute of Agriculture, Karnobat, during the period 2013–2015 and included 10 new lines, Bulgarian selection. The experiment was carried out by blok method, in 4 repetitions, at the plot size of 10 m2. The following traits have been reported: grain yield ((kg/ha), panicle number per m2, panicle number per plant, height of plant (cm), number of spikelets per panicle, grain number per panicle, grain weight per panicle (g), 1000 grain weight (g). Biometric measurements were performed on 25 plants from each iteration. The data were analysed using appropriate statistical methods. The correlation analysis and path coefficient analysis were applied. The direct and indirect effects of the components of the grain yield were determined. Based on the results of this study, correlation coefficients revealed that grain yield significantly and positively correlates with panicle number per m2, grain number per panicle and grain weight per panicle. Path coefficient analysis in the genotypes tested indicated that the grain number per panicle and grain weight per panicle had highest positive direct effect on the grain yield.