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我国是一个农业大国 ,人口众多 ,可耕地少 ,始终面临着严峻的粮食问题。因此 ,扩大作物品种的种质资源 ,培育新的高产品种 ,满足经济发展对粮食的需求 ,是农业持续发展的迫切要求。我国的农业科技工作者通过有性杂交、辐射诱变和生物技术的方法已经选育出了大量的优质高产新品?
As a large agricultural country, our country has a large population, few arable land and always faces a serious food problem. Therefore, expanding the germplasm resources of crop varieties, cultivating new high-yielding varieties and meeting the demand of grain for economic development are the urgent requirements for the sustainable development of agriculture. China’s agricultural science and technology workers have been bred a large number of high-quality high-yield new products through sexual hybridization, radiation mutagenesis and biotechnology methods?