How to do well the selection, purification and rejuvenation of Zizania caduciflora

The main results are as follows: 1. the formation of species instability of Zizania caduciflora is due to the parasitic ear fungus in Zizania caduciflora. With the growth of the plant, when bolting in early summer or autumn, the flower stem tissue on the main stem and the shortened stem of early tillering is stimulated by the metabolite of mycelium, indole memeic acid, and the meristem cells of the 2-7 basal nodes proliferate and expand into tender fleshy stems (galls), that is, edible Zizania caduciflora. Zizania caduciflora shows species instability because of the symbiosis of powdery bacteria, which is very different from other asexual reproduction crops. It is necessary to select seeds and remove impurities every year in order to maintain its excellent species. Select the plants that are tender, white, round, early on the market, high yield, strong breed, concentrated on the market, with the excellent characters of this variety, bearing more Zizania latifolia, no male Zizania latifolia and Zizania latifolia. The specific methods are as follows: in the early stage of pregnancy, depending on the whole field, it is found that the growth of Zizania latifolia is particularly tall, but the stump of Zizania latifolia without pregnancy should be inserted into a branch and marked, and the roots and underground stems should be dug out in time after harvest. Because these clumps of plants have been mutated, either "male Zizania latifolia" or late maturity, in the process of harvest, it is found that the fleshy stem is obviously short, peeling and breaking the fleshy stem is found to be "gray" Zizania latifolia, and should be marked at any time, or the thin and small Zizania caduciflora pier should be dug up thoroughly after harvest. 2. On the basis of removing impurity and inferior quality, if it is found in the process of harvest that most of the tillers grow neatly, Zizania latifolia is early, Zizania caduciflora is concentrated, Zizania caduciflora is fat and tender, Zizania caduciflora accords with the characteristics of Zizania caduciflora, there is no male Zizania latifolia and Zizania latifolia, the node position of Zizania latifolia is low and the yield is higher, it will be used as selected species and reserved as seedlings in the second year after harvest.