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Title

EVALUATION OF FORAGE YIELD STABILITY OF ADVANCED LINES OF GRASS PEA (LATHYRUS SATIVA L.) BY PARAMETRIC AND NON- PARAMETRIC METHODS

Pages

 Start Page 149 | End Page 159

Abstract

 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 x location, line × location and line x year x 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.

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