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本文根据对大麻引种规律的调查研究,并综合各地生产经验和科研资料,认为大麻因其天然异交的授粉习性,其后代混合群体的生长发育表现,一方面受基因频率稳定性的影响,即受遗传平衡定律所支配,能保持种性的一致性;另一方面在生产利用上,又受生态因子及栽培条件对个体发育的影响,表现为异地引种的增产性能。因而综合体现为典型的地理性品种和一定异地引种路线,即生产上一个地区同样的栽培条件下,很少有两个以上当地品种同时存在。 异地引种增产及其后代退化是生产上一个普遍现象。五十年代至六十年代中期,国内不少麻作科技工作者依据某些韧皮纤维类麻类作物的光周期个体发育特性,提出“南麻北种”的增产规律,在生产上有一定指导意义,但不能概括大麻异地引种的特点。
Based on the investigation of the introduction rules of cannabis and the production experience and scientific research data of each place, this paper considers that the natural heterosis of hemp due to its natural pollination habits and the growth and development of the mixed population of its offspring, on the one hand by the gene frequency stability, namely By the laws of genetic balance dominated, to maintain the consistency of species; the other hand, in the production and use, but also by ecological factors and cultivation conditions on the development of individuals, manifested as exotic yield growth performance. Therefore, it can be seen as a typical geographical variety and a certain exotic introduction route, that is, under the same cultivation conditions in the previous area of production, very few two or more local varieties exist at the same time. Introduction of different places to increase yield and its offspring is a production of a common phenomenon. From the 1950s to the mid-1960s, many domestic scientists and technologists put forward the law of increasing production of “Nan Ma Bei Zhong” according to the individual developmental characteristics of some bast fiber hemp crops, Guidance, but can not be generalized introduction of cannabis characteristics.