Correlation and Path Analysis of Grain Yield and Yield Components of some Turkish Oat Genotypes

and Samsun Ladik-İbiköyü). Field experiments were carried out in rainfed conditions for two winter cropping years (2002-03 and 2005-06) in Kahramanmaras province located in between 370 531 N, 360 581 E in East-Mediterranean Region of Turkey. Some climatically data in the region were given in Table 1. Available rainfall in experiment years was higher than average rainfall of long-term years (Table 1). Some chemical and physical traits of two years experiment soils sampled from 0-30 cm topsoil are shown in Table 2. Pearson correlations and path coefficients among yield and yield components were determined by statistical software of TARIST (Açıkgöz et al. 1994). This research was carried out in 2002-03 and 2005-06 crop years in Kahramanmaras province located in East-Mediterranean Region of Turkey. The experimental design was randomized complete block design with four replications. The aim of research was to determine correlation coefficients among grain yield (GY) and plant height (PH), grain number per panicle (GNP), grain weight per panicle (GWP), 1000 grain weight (1000-GW), grain filling period (GFP), days to maturity (DM), panicle number per m-2 (PN m-2) of 17 oat genotypes. It was also determined direct and indirect effects of yield components on GY through path analysis. Based on the results of this study, correlation coefficients revealed that GY was significantly and negatively correlated with PH (r=-0.280*), while the other yield components were not significantly related with GY. Path coefficient analysis indicated that PN m-2 (0.23), 1000-GW (0.35) and GNP (0.22), GFP (0.16) and DM (0.09) had positive direct effects on GY while GWP (-0.40) and PH (-0.24) had negative direc