摘要
筛选、鉴定耐低温高粱材料及挖掘耐低温基因能极大地促进高粱耐低温品种的培育。本研究利用全球收集的631份高粱材料经过8、6、4和2℃逐步低温处理的方法筛选鉴定,同时统计了高粱粒色与耐低温、染菌率的关系。最终筛选到7份耐低温较强的高粱材料,其中1份来自中国的帚用高粱在2℃低温处理14 d后仍有较高的相对萌发率和相对出苗率。高粱种子萌发期,白粒高粱最易染菌,黄粒高粱次之,红粒高粱染菌率最低。耐低温级别高的材料不同粒色都有分布。表明6℃或更低温度对种子的萌发率和出苗率都具有非常大的影响。随着高粱粒色的逐渐加深,染菌率逐渐降低。
Screening and identification the low-temperature resistant materials and genes can greatly promote the cultivation of the ature resistant varieties of sorghum. 631 sorghum materials, from the whole world, were treated by the method of 8, 6, 4 and 2 selection. Meanwhile, we discussed the relationship between sorghum grain color and low-temperature resistant property and rate. 7 higher low-temperature resistant materials were obtained, and 1 broom sorghum from China had the higher relative gert and relative seedling-emergence rate after 2 ℃ low-temperature treatment for 14 d. Compared with yellow sorghum and red soJ sorghum is easiest to infect bacteria at the seed germination stage. Red sorghum is most difficult to infect bacteria. More low-tcsistant materials have different grain color. 6 ℃ or lower temperature treatment will have very significant effect on the germinal seedling-emergence rate. With the deepening of sorghum grain color, the infection rate is gradually reduced.
出处
《西南农业学报》
CSCD
北大核心
2017年第1期20-25,共6页
Southwest China Journal of Agricultural Sciences
基金
国家现代农业产业技术体系项目"高粱重要抗性资源鉴定筛选与种质创新(CARS-06-01-06)"
辽宁省科技攻关项目"主要作物生物育种技术研究(2011208001)"
国家自然科学基金"高粱茎秆蜡层缺失突变体sb1基因克隆及功能研究(31500203)"
关键词
高粱
种子萌发
低温胁迫
相对萌发势
相对萌发率
相对出苗率
Sorghum bicolor
Seed germination
Low-temperature stress
Relative germination vigor
Relative germination ra seedling-emergence rate
