过去保持水稻品种优良特性的方法,是通过栽培过程中对品种的不断选择来实现的。这样品种就会不断的自然杂交、突然变异及人为过失造成了混杂,再通过人工选择,势必引起原品种优良遗传组成的变化。低温、干燥条件下的种子长期保存法,有效地解决了这个问题,得以使品种具有 In the past, the method of maintaining the excellent characteristics of rice varieties was achieved through constant selection of cultivars during the cultivation process. Such breeds will continue to be natural hybrids, sudden mutations and human errors caused by the confusion, and then by artificial selection, is bound to cause the original varieties of fine genetic composition changes. Long-term preservation of seeds under low temperature and dry conditions effectively solves this problem and enables the varieties to have