بررسی پایداری عملکرد ارقام پیشرفته کلزا در شرایط دیم گرمسیری

This research was conducted to study on yield stability of advanced rapeseed genotypes at warm rainfed conditions. Present work was performed by 6 advanced varieties with cv. Hyola401 as control in 3 years (2005-2008) in dry land agricultural research station in gachsaran. This experiment was performed with randomization completely block design in 3 replications. Seeds were planted in 5 rows (length of 4 m) and border of 25 cm in wide. During growth season, some agronomical and morpho- physiological traits were registered such as stemming date, number of pod per plant, number of seed per pod, plant height, days to flowering and days to maturity After harvesting, 1000-grain weight and grain yield were measured by workers. Simple analysis was performed by MSTATC soft ware and mean comparisons calculated on the base of least significant difference (LSD). Simple variance analysis of first year showed that cv. Hyola401 (control) had higher grain yield (2500.7 kg/ha) followed by genotypes G98-b2/51 (2473 kg/ha) and RGS003 (2470 kg/ha). In second year, results showed that after cv. Hyola401 which had higher grain yield, option500 and G98-b2/51 (1972.7 and 1881 kg/ha respectively) genotypes of were more excellent than other genotypes, while genotype of Foseto had the lowest grain yield (1587.5 kg/ha) among genotypes. In third year, We could not obtained any production because of drought. Results of combined analysis revealed that, the genotypes have significant difference (p< 0.01) in respected of grain yield but the effect of genotype ا year was not significant. Study in grain yield stability of genotypes by ranking method revealed that the genotypes of Hyola401 (control), G98-b2/5 optiones1and RGS003 with mean ranks of 1, 2.5, 3.5 and 4 respectively, produced higher grain yield. The rank standard deviations of these genotypes were 0, 0.71, 2.12 and 1.41 respectively. On the base of the trial results, there were no significant difference between cv. Hyola401 (control) and two genotypes of G98-b2/51and RGS003; therefore, these two genotypes can be used in Gachsaran and other similar regions.

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منداب ، ارقام ، پایداری ، عملکرد زراعی ، مناطق گرمسیری