日本在人的染色体解析技术方面落后于欧美国家 ,但在植物尤其是水稻染色体解析方面却保持着领先地位。现在 ,日本正在力求使这一地位不受动摇。水稻共有 12对染色体 ,约 4 3亿个碱基对。日本是以稻米为主食的国家 ,在所有的农作物中 ,日本只能实现稻米的自给有余。为了培育新稻 Japan lags behind the European and American countries in human chromosome analysis technology, but Japan still holds the leading position in plant chromosome analysis. Now, Japan is trying to keep this position from shaken. There are 12 pairs of chromosomes in rice, about 430 million base pairs. Japan is a country where rice is the staple food. Among all the crops, Japan can only provide self-sufficient rice. In order to cultivate new rice