本文通过测定3种披碱草属牧草的花粉-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,老芒麦、麦薲草和披碱草花粉-胚珠比(P/O值)均处于31.9~396.0,交配系统属于兼性自交;杂交指数OCI值为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,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 3 Elymus spp. by pollen-ovule ration (P/O value), outcrossing index and seed setting rate under different pollination methods. The results showed that the pollen-ovule ration (P/O value) was 31.9-396.0, mating system was the facultative autogamy. Outcrossing index ( OCI ) value is 2, was also the facultative autogamy. Seed setting rate showed that 3 Elymus spp. was selfing, out-cross compatible. As a result, mating system of 3 Elymus spp. belong to the facultative autogamy.
德英,乌吉玛,穆怀彬,等.3种披碱草属牧草交配系统研究[J].植物遗传资源学报,2015,16(4):903-906.
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