在我国无论南方北方,单季稻双季稻,常年都有不同类型,不同程度的冷害发生。为了防止冷害,除改革育秧栽培技术外,提高品种耐冷性已成为许多国家水稻育种越来越重视的课题。但要成功地培育耐冷水稻良种,首先就要有不同来源的耐冷遗传授体,而耐冷鉴定方 In our country, regardless of the northern and southern part of the world, single-cropping rice double cropping rice has different types and different degrees of chilling injury all year round. In order to prevent cold damage, in addition to reforming and raising seedling cultivation techniques, improving the cold tolerance of varieties has become an issue that more and more attention is paid to rice breeding in many countries. However, to successfully cultivate cold-resistant rice varieties, first of all, there must be different sources of cold tolerance genetic grant, and cold tolerance identification