论文部分内容阅读
本世纪初,北美科学家在考察德国、荷兰以后,开始意识到:种用马铃薯的退化是病毒病引起的,这些病毒是经马铃薯生育期间相互感染和带病毒种薯传播的。美国马铃薯协会首次会议不久,马铃薯检验计划就在爱达荷、缅因、马里兰,佛蒙特和威斯康星州以及在加拿大的新不伦瑞克和爱德华岛开始实施。短短的几年里,在其它州也开始实施类似的计划。在加拿大联邦政府,这一计划已扩大到所有省份。检验促使把种用马铃薯的改良工作重点放在品种纯度、脱毒或减轻退化上。
At the beginning of this century, after North American scientists visited Germany and the Netherlands, they began to realize that the degradation of potato crops is caused by virus diseases that are mutually transmitted during potato growth and propagated by virus-infected seed potatoes. Shortly after the first meeting of the American Potato Association, the potato inspection program began in Idaho, Maine, Maryland, Vermont and Wisconsin as well as in New Brunswick and Eduard Island in Canada. In just a few years, similar programs have started in other states. In the Canadian federal government, this plan has been extended to all provinces. The test has prompted the focus of improved potato work on purity, detoxification or degeneration.