Flue-cured Tobacco Hybrids In Your Smoke On The 4th Breeding And Seed Technology Research

No.4 of GUIYAN is a MS Fl hybrid seed which hybridization K236 as maternal plant and No.4 of GUIYAN as male parent by the tobacco seeds manufactured team of Guizhou Universty. It had passed by The national tobacco species approve officiallies the committee in 2002 .According to our research in stigma vitality, pollen vitality, fruit quantity per plant, flourishing florescence season, pollination methods and so on, No.4 of GUIYAN had 153.70 kg/mu. 6.32yuan/kg,. 955.13 yuan/mu. increasing 16.77kg/mu, 0.44yuan/kg. 147.91yuan/mu compared with K326. Superior leaves of No.4 of GUIYAN is 31.61%, increasing 4.24 percent with K326. Compared its chemical composition with K326, its sugar content was higher , N and nicotine were lower,. It had moderate content to be highgrade flue-cured tobacco. Its disease resistance was better than K326's according with the result which can resist black shank, red stars, tobacco bacterial wilt, CMV, TMV, tobacco root knot nematodeby manual induced. The vitality of stigma with 2 or 3 rows was stronger, so we should select female flower with these rows to pollinate flower. The strongest time of stigma vitality was from 1d before blossoming to 1d after blossoming, so we should pollinate flower in these days. Pollen remained adequate vitality after 4 days' preservation under normal temperature or 15 days' preservation in desiccators, and pollen still remained vitality after being preserved in desiccators for one year. Plant with 80 fruits produced high yield and quality seeds. Hybrid seeds production efficiency was higher when flourishing florescence in the last ten days of July than in the first ten days of September in Guizhou. One person could produced 200-300g hybrids seeds per day with the brush to pollinate flower. The research shows No.4 of GUIYAN has good characters in botany and agronomy, strong resist, good adaptability, moderate need for fertilizer. It is easy to flue dried and become Huang and the maturity . Especially the upper leaves flue-cured quality is better than that of K326 obviously .No.4 of GUIYAN synthesizes the advantage of K326 and No.90 of ZHONGYAN.