中国假俭草种质资源耐铝性变异分析  

Variation of Al tolerance in the germplasm resources of centipedegrass in China

作　　者：褚晓晴[1,2] 陈静波[2] 宗俊勤[2] 丁万文[2] 李珊[2] 蒋乔峰[2] 刘建秀[2] 

机构地区：[1]南京农业大学园艺学院,江苏南京210095 [2]江苏省中国科学院植物研究所,江苏南京210014

出　　处：《草业学报》2012年第3期99-105,共7页Acta Prataculturae Sinica

基　　金：国家自然基金项目(30972017);江苏省科技厅基础设施项目(BM2009905)资助

摘　　要：以美国引进的常用品种‘Common’假俭草和目前最耐铝的假俭草品种‘TifBlair’为对照品种,采用小容积营养液培养法对选用来自中国13个省份的51份假俭草种质资源耐铝性进行评价。结果表明,1 500μmol/L的铝(AlCl3.6H2O)胁迫下假俭草种源间的生长存在显著差异,其中相对根系干重、相对地上部分干重、相对全株干重的变异系数分别为20.55%,15.62%和15.52%。采用隶属函数值的方法对供试材料的耐铝性划分5个等级,处于1～3级的(较耐铝种源)共21个,占总数的39.6%,处于第4级的(中间型)共19个,占总数的35.9%,处于第5级的(铝敏感种源)共13个,占总数的24.5%。其中‘Common’假俭草和耐铝的‘TifBlair’假俭草属于中间类型,这说明中国假俭草种源的耐铝性存在很大的开发潜力。The small-volume solution culture method was used to evaluate the aluminum（Al） tolerance of 51 centipedegrass accessions and two cultivars（＇TifBlair＇ and ＇Common＇） from the USA as a basis for selecting centipedegrass resources with strong Al tolerance thus providing an experimental basis for futher genetic improvement.Significant growth differences were found among 53 accessions treated with 1 500 μmol/L Al,and the CVs of relative root weight,relative shoot weight,and relative total weight were 20.55%,15.62% and 15.52%,respectively.Using the membership function value method,51 centipedegrass accessions were classified into five groups with different levels of Al tolerance.Twenty-one accessions belonged to groups 1-3（Al-tolerant type）,accounting for 39.6% of the total accessions,13 accessions belonged to group 5（Al-sensitive type）,accounting for 24.5%,and 19 accessions belonged to group 4（intermediate Al-tolerant type）,accounting for 35.9%.＇TifBlair＇ and ＇Common＇ were intermediate types,indicating a good potential for developing the genetic resource of Al tolerance in centipedegrass.

关 键 词：假俭草 耐铝性 变异分析 

分 类 号：S688.4[农业科学—观赏园艺]