Dynamic Change of Important Traits During the Development of Flax Seed
In order to determine the accumulation dynamics of flax seed quality and the best harvest time,optimize the quality breeding and high quality cultivation technology of flax,5 germplasms including 1158-S,BISOW,Longya 10,CHLH-99 and 38078,were used to analyze the dynamic change of water content,1000-seed weight,oil content,5 major fatty acids and the lignan content.The samples were taken at 5 d after flowering and sampled every 5 d until maturity.After sampling,the seeds were immediately peeled the capsule to determine fresh weight,dry weight,oil content,5 kinds of main fatty acids content and lignan content.The results showed that the water content,palmitic acid and linoleic acid of different varieties decreased gradually,and reached stability at 40(water content),30(palmitic acid)and 25 d(linoleic acid)after flowering;while the 1 000-seed weight,oil content,α-linolenic acid content and lignan content increased gradually with the ripening of seeds,and reached stabilization at 40,35,35 and 40 d after flowering in sequence.The content of stearic acid decreased first and then increased to stable;oleic acid rose first,then decreased and then increased rapidly to stable.These showed that the palmitic acid and linoleic acid accumulated at the beginning of seed stage,stearic acid and oleic acid accumulated was mainly in the middle and late stages of seed development,whereas the accumulation of seed weight,oil content,α-linolenic acid and lignan content occurred during the whole seed development period.The most positive effect of the accumulation of each index was between dry weight and oleic acid content,and the most negative effect was between oil content and palmitic acid content.In order to increase the content of oil,α-linolenic acid and lignan in flaxseed,it is necessary to prolong the synthesis time of oil,α-linolenic acid and lignan in the plant body as much as possible or increase their growth rate in the early stage.40 d after flowering can be regarded as the best harvest period of the flax important quality accumulation.
万方数据
维普
