بررسی پایداری علوفه لاین های پیشرفته خلر (Lathyrus sativa L.) با روش های پارامتری و غیرپارامتری

In order to evaluate the stability and response of advanced lines of grass pea under rainfed conditions, fourteen lines were studied in a randomized complete block design with three replications at three research stations located in Khoram Abad, Kermanshah and Gachsaran during 2005-2008. Based on combined ANOVA analysis the effects of line, year × location, line × location and line × year × location were significant. Forage yield stability has determined by some parameters including Eberhart & Russell, Wrick’s eco-valance, Finlay and Wilkinson, coefficient of variance, stability variance, sum rank and yield stability. Based on Eberhart and Russell parameter the lines 6, 10, 13 and 2 were identified as stable lines. The regression coefficient of lines 1, 2, 5, 9. 12 and 14 were equivalent b = 1. Based on Wrick’s eco-valance and stability variance parameters, the lowest values were related to lines 6, 7, 1 and 2. Based on coefficient of variance the lines 1, 5, 9 and 12 had higher stability. In the terms of sum rank lines 1, 9 and 12, were selected as desirable lines. Also, in yield stability method the lines 3, 9, 5 and 12 had the most stability. Despite the differences in the results of various stability parameters, lines 1 (Sel. 515), 5 (Sel. 689) and 9 (Sel. 554) with averages forage yields of 5459.70, 5669.19 and 5687.85 kg/h were identified as stable lines as well as adapted to rainfed conditions.