2024年2月25日 星期日
坪用狗牙根( Cynodon spp .) 优良品种( 选系)
Primary identification of the low temperature tolerance of Cynodon spp.excellant turfgrass cultivars
2003年 第12卷 第2期 页码[28-32]    下载全文[0.7MB]  
摘要

以狗牙根属(Cynodon Rich.)的18个优良品种(选系)为试验材料,以我国草坪生产上广泛应用的普通狗牙根〔C. dactylon(L.)Pers.〕品种‘Common’和杂交狗牙根(C. dactylon×C. transvaalensis)品种‘Tifdwarf’与‘Tifway’为对照,用电解质渗透法进行了抗寒性的初步鉴定。结果表明:与对照‘Common’相比,除‘OKc95-1’的LT50与‘Common’接近,其他的普通狗牙根品种(选系)的LT50均低于对照,尤其是C174的LT50为-5.2℃,比对照低4.6℃;杂交狗牙根中,与‘Tifdwarf’和‘Tifway’相比,‘TifgreenⅡ’、‘TifwayⅡ’和‘Midfield’ 3品种的LT50显著低于对照,其LT50分别是-7.5℃、-8.8℃和-6.0℃,‘Tifeagle’、‘ Tifsport’和‘Tiflawn’的LT50则都高于两个对照品种。

Abstract

The low temperature tolerance of 18 variaties or accessions of Cynodon spp. and ‘Common’ as contrast of C . dactylon ( L. ) Pers. , ‘Tifdwarf’ and ‘Tifway’ as contrast of C . dactylon ×C . transvaalensis selections were primarily studied by the means of electrolyte leakage rate. The results showed that the LT50 of all other variaties of C. dactylon was lower than that of ‘Common’ except for‘OKc95-1’, especially C174, the LT50 of C174was -5.2℃and lower than ‘Common’ by -4.6℃; Among the cultivars of C . dactylon × C . transvaalensis, the LT50 of ‘TifgreenⅡ’、‘Tifway Ⅱ’和‘Midfield’ markednessly lower than ‘Tifdwarf’ and ‘Tifway’ as -7.5℃ , -8.8℃ , -6. 0℃and the LT50 of ‘Tifeagle’, ‘Tifsport’ and ‘Tiflawn’ was higher than two contrast variaties.

关键词狗牙根; 抗寒性; 鉴定
Key wordsCynodon spp .; low temperature tolerance; identification
作者宣继萍, 刘建秀
所在单位江 苏 省中国科学院植物研究所( 南京中山植物园) , 江苏 南京 210014
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基金项目江苏省科技厅资助项目( BE2001350) ;江苏省科技厅基础设施建设项目`特色园艺植物种质资源搜集、研究和利用' 资助