高粱耐冷种质的鉴定及利用评价

为了满足高粱育种对耐冷基础材料的需求，解决高粱播后遇低温造成幼芽受冻、幼苗萎焉进而影响高粱产量的问题，对238份高粱种质资源进行了高粱芽期、苗期耐冷性鉴定与评价，从中筛选出芽期耐冷种质15份，苗期耐冷种质11份。印度材料IS-2867和中国育成种TC1383-2、E671在芽期、苗期均为耐冷一级抗性，其中TC1383-2是中国高粱育种常用的恢复系，其耐冷特性对于耐冷品种的选育具有利用价值。结果表明，地方品种、育成种和国外品种的耐冷性存在差异，无论芽期还是苗期，在中国地方品种中都有较高比例的耐冷资源，说明在中国地方品种中挖掘耐冷种质的潜力较大。

Characterization and Evaluation for Cold Tolerance of Sorghum Germplasm

Chilling injury can lead to yield reduction due to the damaged bud and seedling. In order to solve this problem and meet the demand of cold-tolerant materials for breeding, cold tolerance of 238 sorghum varieties were evaluated at germinating stage and seedling stage. 15 and 11 cold-tolerant sorghum varieties were selected for germinating stage and seedling stage, respectively. IS-2867 from India and TC1383-2, E671 from China were divided into first degree of cold-tolerant materials at both the germinating stage and seedling stage. Due to the features of cold tolerance, TC1383-2 as restorer lines in China had a great utilization value in cold tolerance breeding. The results showed that there was difference in cold tolerance among landraces, improved varieties in China and foreign varieties. There were relatively high proportion of cold-tolerant materials in landraces at germinating stage and seedling stage. It indicated there was great potential for cold tolerant materials exploiting in landraces of china.