Different methods have been developed to estimate of genotype by environment interaction (GEI) in crop plants. In this study, 14 kabuli type chickpea genotypes were assessed for seed yield in four stations over three successive years (2010-2013) at west highlands of Iran. Randomized complete block design was used in all test environments with four replicates. Combined analysis of variance for seed yield revealed significant differences between genotypes, locations, and interaction between these two sources. The mean seed yield of genotypes averaged over environments showed that V4 and V2 had the highest (1163.58 kg ha-1) and the lowest seed yield (759.07 kg ha-1), respectively. Significant GE interaction implied that chickpea genotypes had various responses to different environments and, the stability analysis could be performed. To investigate GEI and identify the best performing stable genotypes, several stability parameters were employed. According to Wricke's ecovalance, stability variance, Plaisted method, and genotypic stability V5, V8 and V3 were the most stable genotypes. Based on CV, regression coefficient and MS(GE), V1 and V5 found to be stable and adapted to diverse environments, and the other genotypes distributed among stability statistics. Based on the AMMI biplot, 12 test environments divided into two mega environments. These mega environments included very cold districts like Maragheh and similar areas, and relatively softened regions of Kurdistan and similar environments. For these two mega environments, V6 and V4 showed more adaptability, respectively. In conclusion, the two genotypes, V4 (FLIP 00-39C) and V6 (FLIP 99-26C) could be recommended as new cultivars to chickpea farmers for autumn sowing in west areas of Iran.
A field experiment was carried out during 2005-2006 growing season to comparison winter and spring sowing dates and studies the effect of plant density on the yield, yield components and some quality, morphological traits of one local cultivar chickpea (ghazvin). The experiment comprised of three sowing dates viz. mid November, mid March and mid April, four planting densities viz., 30x7.5, 30x10, 30x15 and 30x20 cm that representing 45, 34, 23 and 17 plant m-2. The experiment was laid out in a split plot design, based on the completely randomized blocks. Results indicated that early sowing (mid November and mid March) crops produce higher yield as compare to mid April and plant density did not significantly affect on the yield. Also effect of sowing date and different plant density on the height plant, branch number per plant and 100 seed weight were not significant but highest number pod per plant attained in mid November sowing date at a density of 30x15 cm, the number of days to maturity was the highest in planted on mid March with a plant density of 30x20 cm and the highest seed protein content was obtained in planted on mid March at densities of 30x7.5 cm.
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