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Effect of Irrigation Cutting Stress on Fatty Acids, Glycosinolate and Some Agronomic Traits in Canola (Brassica napus L.) Cultivars
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Saber Seifamiri   , Mehrdad Yarnia * , Bahram Mirshekari , Farhad Farahvash , Varahram Rashidi |
| Islamic Azad University |
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Abstract: (28 Views) |
To evaluate the response of different rapeseed cultivars to cut-off irrigation at the end of season on seed fatty acids, glycosinolates and agronomic characteristics of cultivars, a split plot experiment based on randomized complete block design with three replications in Moghan Research Center ,was conducted during 2014-2016 cropping season.Experimental treatments were levels of irrigation as the main factor in three levels, normal irrigation (control) according to plant needs and local customs, low irrigation stress in the form of irrigation cutting at the plowing stage and irrigation cutting at the flowering stage and Rapeseed cultivars as sub-factors in 11 levels included 003RGS, Sarigol, Zafar, Dalgan, Julius, Jacomo, Jerry, Jerom, Zabollo, 401Hyola, 4815 Hyola. In this study, the yield and yield components of rapeseed were not significantly affected by water stress after flowering and pods and only post-flowering stress reduced the number of seeds per pod by 4.7%. Biomass also decreased to 2.9% under the influence of stress. Despite the above results, the properties of rapeseed oil were strongly affected by water deficite. The amount of palmitic acid due to stress decreased to 32.6% (at Jerome cultivar), while the amount of linoleic and, erosic acids and glucosinolates under stress increased to 84.4%and 148.7% (at Zafar cultivar) and 118.7% (at Jerome cultivar). In this study, the highest grain yield sa2986 and 2981 kg / ha was obtained in Julius and RGS003 cultivars. In these cultivars, all three components of yield as , yield of number of pods per plant, number of seeds per pod and 1000-seed weight were higher than with comparison of other cultivars.There was a high difference between cultivars for palmitic, lithinolenic, linoleic, oleic acids and glucosinolate. In general, Zafar and , Julius cultivars were the best cultivars due to their high yield and oleic and linoleic acids content.
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| Keywords: Drought stress, Fatty acids, Glycosinolates, Rapeseed. |
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Full-Text [PDF 418 kb]
(54 Downloads)
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Type of Study: Research |
Subject:
Crop Improvment
Received: 2020/06/23 | Accepted: 2024/05/30 | Published: 2024/05/30
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