The Research Of Domestication And Flower Bud Differentiation Conditions Of The Wild Dendranthema Chanetii

In this experiment, wild Compositae gathered from Taigu County in Jinzhong Shanxi Province which is test material, breeding of Compositae, and seedling age, photoperiod, the days of treatment on the flower bud differentiation were studied to determine the optimum breeding, blossom of the optimal light cycle, the best light the days of treatment and the most suitable seedling age for Compositae. Finally get the following results:1. wild Compositae gathered from Taigu County in Jinzhong Shanxi Province were domesticated breeding successly in the nursery of Shanxi Agricultural University, then the number of Compositaea are more and flowering period is longer and plant performance are better than before, so it can be widely used in gardening and greening.2. Through that test of Compositaea seed germination:Compositaea seed germination rate and germination in the light are highter than them in the dark conditions; after4H treatment of different concentrations of gibberellin, the best gibberellin treatment effect of seed is150mg/L; Compositaea seed germination optimum temperature is20℃.3. In Compositaea cuttage experiment, take Compositaea foot shoots as cuttings, a substrate for perlite(A),sand(B),Vermiculite(C),sand:perlite=1:1(D),vermiculite:perlite=1:1(E), sand:vermiculite=1:1(F); Vermiculite:sand:Perlite=1:1:1(G), record each processing plants root number, total root length and root rate. Through the analysis of the data obtained:in the G treatment were the best. D, E and F,treatment are bad; B and C are slightly worse;A has the worst effect.4. Through comparing the survival rate and the propagation coefficient of three modes of reproduction that Compositaea sow, cottage and ramet, Compositaea optimum breeding methods is:cutting propagation.5. Test of the Compositaea bud differentiation uses a single factor and two factors repeated completely randomized design. The three single factors these test set were:seedling stage, photoperiod and light days of treatment, and three of two factors were:age and photoperiod, seedling stage and light treatment duration, photoperiod and light treatment days. Photoperiod treatments set four levels that were8h,10h,12h and14h; seedling treatments set five levels that were6leaves,9leaves,12leaves,15leaves and18leaves; the illumination days treatment set six level that were0d,7d,14d,21d,28d and35d. Each processing are12basin, and it repeats3times. Finally through the test data analysis and draws the following conclusion:When the photoperiodic treatment conditions are not at the same time, the plant light cycle is12h,14h, regardless of age, placing much long time is unable to carry on the flower bud differentiation. Plant light hours in8h,10h, in the appropriate age to flower bud differentiation, and the difference was significant.When the seedling age processing conditions are not at the same time, regardless of the photoperiod and days of treatment conditions, it can not carry on flower bud differentiation at the6leaf stage; a small amount of Compositae can blossom in the9leaf,12leaf seedling size and at a certain short day conditions; it can blossom in the15,18leaf seedling size and at a certain short day conditions.When the illumination time is not at the same time, Compositae number of short day for7d,14d,21d, regardless of the any cycle conditions are not blossom, but the90%plants began to flower bud differentiation; when the days of treatment for28d,35d, most of the seedlings were beginning the flower bud differentiation and blossoming, and although part is not blossom, it had begun flower bud differentiation.