【摘要】 【目的】探明⁶⁰Co-γ射线辐照对不同薄壳山核桃品种的嫁接效应。【方法】采用不同辐照剂量的⁶⁰Co-γ射线对‘金华’‘巴顿’和‘肖尼’3个薄壳山核桃品种的一年生休眠枝条进行辐射处理后嫁接到原品种砧木，研究不同辐照剂量处理对薄壳山核桃嫁接成活率、新梢长度、新梢粗度、叶长、叶宽、叶面积等指标的影响，并通过最优回归方程求出不同薄壳山核桃品种的半致死辐照剂量。【结果】随着⁶⁰Co-γ射线辐照剂量的增加，不同薄壳山核桃品种的嫁接成活率、新梢长度、新梢粗度、叶长、叶宽和叶面积等指标均呈现下降的趋势；不同薄壳山核桃品种对⁶⁰Co-γ射线辐照的敏感性不同，供试的3个薄壳山核桃品种对⁶⁰Co-γ射线辐照的敏感性由高到低依次为：‘肖尼’‘巴顿’‘金华’，对应的半致死辐照剂量分别为16.77、21.69、23.31 Gy。【结论】薄壳山核桃对⁶⁰Co-γ射线辐照的敏感性较高，低剂量辐照可以使薄壳山核桃枝条产生生物损伤的同时维持较高的嫁接成活率。更多还原

【Abstract】 【Objective】Exploring the effect of ⁶⁰Co-γ irradiation on the grafting of different Carya illinoensis cultivars.【Method】The annual dormant branches of C.illinoensis cultivars′Jinhua′,′Barton′and′Shawnee′were irradiated by different doses of⁶⁰Co-γ ray and grafted onto the stock of the original cultivars,and then the differences of grafting survival rate,shoot length,shoot thickness,leaf length,leaf width and leaf area of the C.illinoensis were studied.【Result】The grafting survival rate,shoot length,shoot thickness,leaf length,leaf width and leaf area of different C.illinoensis cultivars decreased gradually with the increase of ⁶⁰Co-γ irradiation dose,the sensitivity of different C.illinoensis cultivars to ⁶⁰Co-γ irradiation was different.The sensitivity of the three C.illinoensis cultivars from high to low was′Shawnee′′Patton′and′Jinhua′,and their semi-lethal doses of ⁶⁰Co-γ irradiation were 16.77,21.69,23.31 Gy.【Conclusion】C.illinoensis was sensitive to ⁶⁰Co-γ radiation and low dose irradiation of ⁶⁰Co-γ could cause biological damage to the shoots of C.illinoensis while maintaining a high survival grafting rate.更多还原