The effect of sowing season on seeds germination characteristics of 12 cultivars of spring rapeseed
For studying the effect of sowing season on seeds germination characteristics of 12 high-yield cultivars of spring rapeseed, the experiment was performed in 2004-2005 in the research field and laboratory of Tehran University. The experimental design used for this study was factorial in the form of randomized completed design with four replications. Treatments were conisted of first factor in two levels 1-seeds were obtained from autumnal sowing (date of sowing: 6 October) and 2-seeds were obtained from spring sowing (date of sowing: 2 March). Second factor was 12 cultivars of spring rapeseed. According to the results, seed weight,oil percentage, seed vitality, length of radicles and plumules, seedling dry weight, the number of normal and abnormal seedlings with the 0.0001 probability level and the average of daily germination, mean of time of germination, and seedling vigor index with 0.05 probability level were affected by sowing season. Based on mean comparison, seedlings which were obtained from seeds of autumnal sowing, in consequence of having the higher oil and seed weight, have higher metabolism than spring sowing. Also in this treatment, length of radicles, seed vitality index and daily reduction of seedling weight due to respiration was higher. Seeds of autumnal sowing in consequence of higher reserves materials and higher received GDD during the ripening stage and being complete of ripening stage showed the higher vitality and greater normal seedlings. Length of plumules due to negative correlation with oil percentage(R=0.36) and seed weight(R=0.40) and the number of abnormal seedlings due to faster ripening were higher in spring treatment. Weight of thousand of seeds, oil percentage, seedling dry weight, length of radicles and plumules and seed vitality with 0.001 probability and germination rate with 0.01 probability level was affected by kind of cultivar. RG405/03 cultivar in consequence of higher received GDD during seed loading stage produced the higher seed weight that it causes higher metabolism during primary growth and then generated taller seedlings and radicles, higher respiration and vitality seed. AMICA and KIMBERLY cultivars due to low seed weight had the lowest vitality, length of radicles and seedling, number of normal seedlings, seedling vigor index, daily respiration and the highest length of plumules. Interaction effect of treatments in consequence of not existing significant effect on the seed weight did not influence on many characters.
Rapeseed Sowing season Germination Vitality
Lotfifar Omid Akbari GH.Ali Sadatnouri Ahmad Shirani Rad Amirhosein Mottaghi Samaneh Mottaghi Leila
Department of agriculture science, University of Tehran.Tehran- Iran Plant and seed breeding institute.Karaj- Iran Former biotechnology Graduate student
国际会议
第十二届国际油菜大会( The 12th International Rapeseed Congress)
武汉
英文
864-867
2007-03-26（万方平台首次上网日期，不代表论文的发表时间）