بررسی عملکرد ارقام جو و رابطه عملکرد با اجزای آن در منطقه دیلمان (گیلان)

In this study, nine cultivars of barley were cultivated in a Deilaman dry land (Guilan) in a randomized complete block design with three replications and surveyed in 2012-2013 crop seasons to grain yield, biological yield and some yield components comparison. ANOVA analysis showed that the barley spike length and plant height were significantly different in cultivars. Means comparison showed that the “local barley” for spike length “Nik” cultivar for plant height were distinct from other genotypes. Tarm92 and Yea/168 two cultivars with biological yield over than two thousand grams per plot, as high yielding genotypes were identified. Significantly correlation between 1000 seed weight and biological yield, plant height and grain yield were positive, whereas correlation between the number of filled grains per spike and 1000 grain weight, number of spike and plant height were negative. The biological yield equation estimated with step by step regression method. Both of grain yield and harvest index were in that equation with high regression coefficients. Path analysis also indicated that grain yield and harvest index directly and number of fertile tillers and spike length through the grain yield, and 1000 grain weight through the plant height, were effective on the biological yield increasing indirectly.