论文部分内容阅读
日本是一个群岛国家,山地和丘陵约占国土总面积的85%,耕地面积仅占15%左右,农作物遗传资源贫乏。二次世界大战后,日本对作物遗传资源工作颇为重视,在作物起源中心的考察、近缘野生种的评价与利用、农家品种的收集与保存等方面,做了大量工作,从而有效地促进了日本作物品种改良事业的发展,较大幅度地提高了作物单位面积产量及土地利用率,获得了显著的经济效益。
Japan is an archipelagic country, with mountains and hills accounting for about 85% of the total land area, only about 15% of arable land, and a lack of genetic resources for crops. After the Second World War, Japan paid much attention to the work of crop genetic resources. It has done a great deal of work on the investigation of the origin of the crops, the evaluation and utilization of the related wild species, the collection and preservation of the varieties of farmers, so as to effectively promote The development of the crop variety improvement project in Japan greatly improved the yield per unit area of crops and the land utilization rate and obtained significant economic benefits.