摘要
以6个不同熟性的菜心品种为材料,研究供试材料在不同条件下萌发的发芽率(GR)、发芽势(GV)、发芽指数(GI)、芽全长(BFL)、根长(RL)、芽鲜重(WFW)和根鲜重(RW)相对值的变化,采用隶属函数法分析并筛选与热害指数显著相关的指标。结果表明:42℃萌发2 d的GV、GR、GI,38℃萌发4 d的GV,42℃萌发的BFL,42℃老化处理4 d的GV、BFL、RL,42℃老化处理8 d的GV、BFL等10项指标与热害指数呈显著负相关,其相关系数分别为–0.837、–0.837、–0.824、–0.849、–0.964、–0.841、–0.842、–0.835、–0.867、–0.915。根据10项指标计算综合隶属函数值(0.021～0.986),用最小距离法进行耐热性聚类分析,6份菜心可分为3类:四九–19号菜心和四九黄菜心为耐热类;油绿50天菜心、油绿501菜心和油绿701菜心为一般耐热类;特青迟心4号为极不耐热类。
The effects of high temperature stress on seed germination, the germination rate（GR）, germinating viability（GV）, germination index（G0,bud full length（BFL）,root length（RL）,whole fresh weight（WFW）,root weight（RW）, in six different cooked Chinese flowering cabbage cultivars during harvesting time in heat stress plastic shelter have been investigated.The significantly related indicators are screened with the heat injury by the membership function method. The results show that 10 indexes, are significant negative correlation with the heat injury index, can be used to identify the heat resistance of Chinese flowering cabbages. It includes the GV, GR and G/under 42 ℃ for 2 d, the GVunder 38 ℃ and BFL under for 4 d, the aging seeds＇ GV, BFL, RL under 42 ℃ for 4 d and GV, BFL under 42 ℃ for 8 d （incomplete sentence, don＇t know what to comment here）. The heat tolerance of the tested 6 cultivars can be divided into three types by using the minimum distance method according to 10 indexes calculation comprehensive subordinate function value （from 0.021 to 0.986）.The Sijiu-19caixin and Sijiu huang caixin are most heat-tolerant, Youltu 50 d caixin, Youlu 501 caixin and Youl0 701 caixin are general heat-tolerant, while Teqing chixin 4 is heat-sensitive.
出处
《湖南农业大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第1期31-35,共5页
Journal of Hunan Agricultural University(Natural Sciences)
基金
广东省特色蔬菜现代产业技术体系(20120201)
广州市农业局招标项目(GZCQC1002FG08015)
广州市科技局支撑计划(2009Z1–E801)
关键词
菜心
种子活力
耐热性
热害指数
Chinese flowering cabbage
seed vigor
heat tolerance
heat injury index
