不同苜蓿品种自交结实性的研究

Study on Inbred-fruitfulness of Different Alfalfa Varieties

对10个苜蓿品种、3种自交方式、2种授粉方式处理的苜蓿自交结实性进行了调查。结果表明,不同处理的苜蓿自交结实率各不相同,均存在着显著性差异,但单荚螺旋数和种子千粒重各处理间差异不显著。3种自交方式的自交结实率按照单花自交—同花序自交—同植株自交的顺序呈递增趋势,但同花序自交与同植株自交的差异不显著,而均与单花自交的差异达显著水平;人工授粉与天然授粉相比,可以显著提高苜蓿的自交结实率。但人工授粉对单花自交的结实率提高不显著,主要提高同花序自交和同植株自交的结实率。

The inbred-fruitfulness of 10 alfalfa varieties treated with 3 inbred ways and 2 pollination modes were investigated. The result indicated that the different treatments had varied inbred-fruitfulness rates, the difference was significant, but the difference was not obvious among each treatment for helical number of per-pod arid thousand seed weight of seeds. The self-fruitful rates of 3 inbred ways presented an increasing tendency according to the order of inbred in single flower—— inbred in same inflorescence ——inbred in same plant, and the difference between the inbred in same inflorescence and that in same plant was not evident, but all had significant difference level with inbred in same flower. Compared with spontaneous pollinationl the artificial pollination was able to increase obviously the self-fruitful rate of alfalfa. But artificial pollination did not improve significantly the seed setting rate of inbred in single flower, however it mainly increased the self-fruitful rates of inbred in same inflorescence and same plant.