摘要
探讨黄瓜砧木资源的耐寒性,为黄瓜嫁接砧木的选择提供试验依据。分别在种子萌发期和幼苗期对48份黄瓜嫁接砧木进行低温处理,通过测定种子发芽率、发芽势、发芽指数、种子活力和幼苗株高、茎粗、鲜重、干重、壮苗指数、冷害指数等,采用主成分分析和聚类分析方法,鉴定评价了黄瓜嫁接砧木的耐寒性。结果表明:在种子萌发期48份种质资源可划分为耐低温型(1个)、较耐低温型(16个)、低温较敏感型(11个)和低温敏感型(20个)4类;在幼苗期,可分为耐低温型(11个)、较耐低温型(17个)和低温敏感型(20个)3类。可见,种子萌发期和幼苗期耐寒性较强的砧木品种有9个:1,2,3,6,13,17,26,27和33,对低温较敏感的有11个:21,22,23,24,32,34,37,40,42,44和46。
The aim of this study was to investigate the chilling-tolerance of cucumber rootstocks and offer a test basis on selecting rootstocks. 48 accessions of cucumber rootstock germplasms were treated with low temperature at germination stage and seedling stage to screen for chilling tolerance in terms of principal component analysis and cluster analysis. Germination rate, germination potential, germination index, vigor index at germination stage and plant height, stem thick, biomass, seedling index, chilling injury index were evaluated. The result showed that 48 germplasms were fell into 4 types at germination stage including chilling tolerance line（l）, moderately chilling tolerance line（16）, moderately chilling susceptible line（l 1）, chilling susceptible line （20）, and 3 types at seedling stage including chilling tolerance line（l 1）, moderately chilling tolerance line（17）, chilling susceptible line（20）. [Conclusion] In both two stages, there were 9 chilling tolerant cultivars including 1, 2, 3, 6, 13, 17, 26, 27, 33, and 11 chilling sensitive euhivars including 21, 22, 23, 24, 32, 34, 37, 40, 42, 44 and 46.
出处
《沈阳农业大学学报》
CAS
CSCD
北大核心
2013年第5期609-615,共7页
Journal of Shenyang Agricultural University
基金
现代农业产业技术体系建设专项(CARS-25-C-03)
江苏省农业三新工程项目(SXGC[2012]391)
关键词
黄瓜砧木
耐寒性
主成分分析
聚类分析
cucumber rootstock
chilling-tolerance
principal compoents analysis
cluster analysis
