【摘要】 以‘新世纪’、‘石原早生’、‘澳李14’李品种为试材,研究⁶⁰Co-γ辐射,对李花粉发芽率的影响。结果表明:不同剂量率对李花粉发芽率影响较明显,‘新世纪’李、‘澳李14’李均以剂量率0.6 Gy/min辐射后花粉发芽率最高,且随剂量率的升高花粉发芽率逐渐降低;‘石原早生’李以1.2 Gy/min最高。不同剂量对不同李品种花粉发芽率影响相同,‘新世纪’李、‘石原早生’李、‘澳李14’均以剂量20 Gy辐射后花粉发芽率最高,且随剂量的升高花粉发芽率逐渐降低。说明低剂量、低剂量率辐射不同李品种花粉后发芽率较高,可用于远缘杂交育种。更多还原

【Abstract】 The pollen of Prunnus salicina Linn cultivars‘Xinshiji’,‘Shiyuanzaosheng’ and‘Aolil4’ were radiated by ⁶⁰Co-γand their germination rates were determined.The results showed that different dose ratios of ⁶⁰Co-γhad a significant effect on the pollen germination rate of different Prunnus Linn cultivars.The highest pollen germination rate of Prunus salicina Linn.‘Xinshiji’ and‘Aolil4’ was obtained after the pollen was radiated by 0.6 Gy/min dose rate. However,the pollen germination rate decreased with the increase of irradiation dose rate.The highest pollen germination rate of shiyuanzaosheng was obtained after the pollen radiated by 1.2 Gy/min dose rate.There was a similar effect of different dose ⁶⁰Co-γradiating on the pollen germination rate of different Prunnus Linn cultivars.The highest pollen germination rate of Prunus salicina Linn.‘Xinshiji’,‘Shiyuanzaosheng’,‘Aolil4 was the pollen radiated by 20 Gy dose.Moreover,the pollen germination rate decreased with the increase of irradiation dose.The higher pollen germination rate of Prunus salicina Linn.was obtained after the pollen was radiated by lower dose and dose rate ⁶⁰Co-γand the pollen was used for interspecific hybridization.更多还原