冷害是水稻生产的主要限制因子之一。据报道,冷害不仅在温带稻区而且在热带稻区也有发生。它既影响水稻的高产稳产;且限制了水稻的栽种面积以及复种面积的扩大。在防御冷害的各种措施之中,选育耐冷品种是有效途径之一。水稻不同品种耐冷性有广泛的差异。王洪春、Yergara等研究发现品种耐冷性强弱与原产地有关。不同生育期的稻株耐 Chilling injury is one of the major limiting factors in rice production. It has been reported that cold damage occurs not only in temperate but also in tropical paddy areas. It not only affects the high and stable yield of rice, but also limits the planting area of ​​rice and the expansion of multiple cropping. Among the various measures to prevent chilling, breeding cold-tolerant varieties is one of the effective ways. Different varieties of rice have a wide range of cold tolerance. Wang Hongchun, Yergara and other studies have found that the cold tolerance of varieties and origin. Rice at different growth stages resistance