几种果树花粉对软X射线的辐射敏感性差异

SOFT X-RAY RADIO-SENSITIVITIES OF POLLENS IN SEVERAL FRUIT SPECIES

以不同剂量的软Ｘ射线对白芒蟠桃、克菲梨、枳和柚等４种果树花粉进行辐射，观察发芽能力及其存放后的变化情况。结果表明：４种果树的花粉对软Ｘ射线的辐射敏感性有很大差异，且都表现出明显的贮存效应；对同一种果树的花粉，如果辐射的目的和育种的途迳不同，其适宜的辐射剂量和辐射后的最佳授粉时机也不同。

Irradiated with different dosages of soft X-ray, pollen germinations of prunus baimang,pear kieffer,trifoliate orange and pummelo, were investigated immediately or several days later after irradiation. The results revealed that the pollens of these fruit trees had different sensitivities to soft X-ray and various responses to storage duration. Therefore, even to the same kind of pollen,irradiation with different optimal exposure doses,as well as pollination at different times during storage, should be adopted variously according to the different aims and methods of breeding programs.