Study On Seed Production In Hybrid Wheat

XZ1 is the first winter wheat cultivator examined and approved in china Huanghe-huaihe river irrigation district. The invention and population of XZ1 not only greatly improved the wheat study level in china, but also initiated a new method for enhancing Chinese wheat yield potentialities and indicated Chinese wheat breeding coming into a new period. It is estimated that the XZ1 and other cross breeding combinations will develop significantly in last years. The requirement of hybrid seeds will increase sharply in company with the popularization of XZ1. as the reproduce capacity of wheat is poor, how to produce hybrid seeds economically is a urgent problem at present. Launching studies on the seed production techniques of hybrid wheat has profound realistic significance for improving application of hybrid wheat and enhancing hybrid wheat industrialization.In order to meet the requirement of market and industrialization of hybrid wheat, we studies the seed production techniques of hybrid wheat. Based on the study of the rendezvous of the PF and PM flower, dispose of row-ratio and dill-strip width, the vigor of pistil, and the best doze and term of CHA spray.1. If the male parent and female parent flower is not rendezvous well, we can regulate chemistry facet,spry chemistry substance NAA and AC,it can improve activity of chapiter and glume opening angle,increase the ratio of cross seed set.2. When the female drill-strip width of XZ1 set in scope of 1.6 meters, the ratio of cross seed set doesn't increase significantly company with the increase of male drill-strip width, two lines of male parent can provide enough pollen.with row ratio 5:12, the female drill-strip width set in scope of 2.4 meters, male parent can provide enough pollen. In practice, we adopt row-ratio and drill-strip width are 5 lines of male parent with 12 lines of female parent can get high yield and better beneficial and convenient machine operation.3. To prove up the infection of CHA SQ-1 under the rainy day and the bad weather conditions, and the ratio of seed sets by repeating spray after raining in wheat, the experiment analyzed the effect of CHA SQ-1 and the ratio of open pollination in the simulated rainfall in different treatment and spraying CHA in different treatment. The result shown as CHA SQ-1 was absorbed completely in 2-8 hours before the rain falling down and have perfect effect of inducing the 95 percent of male sterility. CHA SQ-1 harms to vigor of pistil in dose 5kg/hm2 in some degree and makes the wheat lower distinctly.