3种披碱草属(Elymus)牧草交配系统研究  

Study on Mating System of Three Elymus spp.

作　　者：德英[1] 乌吉玛[2] 穆怀彬[1] 解继红[1] 赵来喜[1] 

机构地区：[1]中国农业科学院草原研究所/农业部草原资源与生态重点开放实验室,呼和浩特010010 [2]内蒙古师范大学生命科学与技术学院,呼和浩特010022

出　　处：《植物遗传资源学报》2015年第4期903-906,913,共5页Journal of Plant Genetic Resources

基　　金：中国农业科学院科技创新工程草原研究所草种质资源与育种团队;"十二五"国家科技支撑计划项目(2012BAD13B07;2011BAD17B01);中央级公益性科研院所基本科研业务费专项资金(1610332015016)

摘　　要：通过测定3种披碱草属（Elymus）牧草,即老芒麦（E.sibiricus）、麦薲草（E.tangutorum）和披碱草（E.dahuricus）的花粉-胚珠比（P/O值）、杂交指数（OCI）,结合不同授粉方式下这3种牧草的结实率,探讨这3种披碱草属牧草的交配系统,为披碱草属牧草杂交育种、丰产栽培等提供理论依据。结果表明,这3种牧草的花粉-胚珠比（P/O值）均介于31.9~396.0之间,交配系统属于兼性自交;杂交指数OCI值均为2,交配系统也属于兼性自交;结实率统计表明,以自交为主,异交可育。因此,这3种披碱草属牧草的交配系统属于兼性自交类型。To provide a theoretical basis for crossbreeding,yielding cultivation of Elymus,an experiment was conducted to study mating system of E. sibiricus,E. tangutorum and E. dahuricus by pollen-ovule ration（ P / O value）,outcrossing index and seed setting rate under different pollination methods. The results showed that the pollenovule ration（ P / O value） was between 31. 9 and 396. 0,mating system was the facultative autogamy. Outcrossing index（ OCI） value was two,was the facultative autogamy too. Seed setting rate showed that they were selfing,out-cross compatible. As a result,mating system of three Elymus spp. belong to the facultative autogamy.

关 键 词：披碱草属(Elymus)牧草 交配系统 花粉-胚珠比 杂交指数 结实率 

分 类 号：S543.9[农业科学—作物学]