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¹ Tarla Bitkileri Merkez Araştırma Enstitüsü Müdürlüğü, Ankara
² Adnan Menderes Üniversitesi Ziraat Fakültesi Tarla Bitkileri Bölümü, Aydın - Research was conducted at the experimental fields of Aegean Agricultural Research Institute (AARI) to determine the relationship between yield and yield components of oat (Avena sativa L.) in 2009-2010 and 2010- 2011 two yield trials (OYT-1 and OYT-2). There were 25 genotypes in each trial. Experimental design was completely randomized block design with four replications in the both trials. This relationship between the mean values obtained on yield and yield components were evaluated according to the test correlation and path analysis. The rates of protein, oil, starch, nutritious fiber, beta glucan, glume, and ash in grain; addition, plant height, grain size, harvest index, panicula height, number of spikelet in a panicula, number of grain in a panicula, grain weight in panicle, thousand kernel weight, test weight and grain yield were evaluated. According to the results; the correlations between yield and yield components including test weight, thousand kernel weight, grain size and harvest index were positive and significantly important. Harvest index had the highest correlation coefficient. Harvest index, grain weight in panicula, test weight, starch, protein, panicula height, number of spikelet in a panicula and plant height had positive and significant direct effect on grain yield. Correlation and Path analysis results suggested that harvest index, grain weight in a panicula and test weight be needed to be raised for higher grain yield. Keywords : Oat (Avena sativa L.), grain yield, correlation, path analysis