毛主席教导我们:“无论什么事物的运动都采取两种状态,相对地静止的状态和显著地变动的状态。”烤烟品种本身具有把性状相对稳定地传给后代的“遗传性”,同时,这些性状又有发生一定变化的“变异性”。在生产过程中,如果人们依据遗传与变异的矛盾发展规律,精心选种和培育,巩固优良性状,就能使品种不断进化,变得更好。否则,就会沿着相反的方向变坏。我省主要烤烟良种大金元,由下栽培年代较久,选种留种不够认真,已经退化变杂,产 Chairman Mao taught us: “No matter what kind of sport, we adopt two states, a relatively still state and a markedly changing state.” The flue-cured tobacco varieties themselves have the “hereditary” nature of relatively stable transmission of their traits to future generations. There are some “changes” in these traits. In the process of production, if people according to the law of genetic and mutation contradictory development, carefully selected and nurtured, to consolidate the fine traits, you can make the continuous evolution of species, to become better. Otherwise, it will deteriorate in the opposite direction. The main flue-cured tobacco Daikin yuan in our province, from the cultivation of older, selection of species is not serious enough, has been degraded Miscellaneous, production