The Variance Analysis Of Spring Wheat Seed Vitality In Different Genotypes And Its Respond To Harvest Period

Spring wheat of different parts, the size of grain, determine the seed vigor of that year after harvest; Under the condition of different genotype, different harvest site, size of the spring wheat seeds, tends to affect the weak and the strong field of wheat next year after sowing, seedling filleting ability, and earing rate, so how to reduce production, meet the single grain sowing or fine quantity sowing seeds of high energy requirements become another key technology to reduce production costs. This experiment with different genotypes " Xin Chun11, Xin Chun29, Xin Chun30, Xin Chun34" and different spring wheat harvest seeds as the material, with different grain parts, size, aging time of the spring wheat seeds as the research object, in order to find out the different genotype, harvest, aging time and the relationship between the seed vigor change, in order to further study provide theoretical basis for the change rule of seed vigor. The main conclusions of this test is:1. In three kinds of calculation method to calculate the corresponding dynamic size, different varieties of seed vigor order under three kinds of calculation performance trends, but Xin Chun34species no matter in what way, tend to a better, and the other three varieties of the indicators are not present a consistent trend, using different calculation, it is concluded that the laws of the inconsistencies, investigate its reason, it is not clear, needs further research. Significant difference exists among different maturity of wheat seed vitality, with the higher maturity and seed vigor rising, in milk stage and ripening stage, late ripening fastest rising, to the full ripeness period peaked. With germination rate can not only reflect the physiological differences between wheat seeds of different maturity, while vigor index can reflect the differences.2. Spring wheat seeds of artificial aging treatment2d on26seed aging impact is not big, later, with the extension of artificial aging time, the seed germination potential, germination rate, seedling dry weight were significantly decline, to artificial aging8d seed germination rate is only60.33%, shows that the seed within short time Ann received damage is lighter, high temperature and high humidity stress aging, the longer the seed the deeper the hurt, the faster the deterioration.3. Xinchun26, Xinchun6wheat seed with prolonging deterioration time, vigor index, germination rate, seedling fresh and dry weight, germination index were significantly reduced, aged only10.33%,11.01%germination rate of8d seeds, the short time high temperature and moisture stress on seed damage can be partially restored however, the deterioration rate of more deep, ability of seeds of self-repair is low, the seed damage more deep.4. Different aging treatment on the germination of72h radicle research shows that the seed morphology, cellular structure in the process of deterioration, the cells from the external form to the internal structure is undergoing profound changes, cause energy loss, so that the loss of production value in the end. In the process of seed vigor gradually lose, vigor index is bigger than the change in germination rate, vigor index of seed aging reaction is more sensitive. So the seed vigor index can be used as a reflection of seed vigor index.