摘要
用60Co-γ射线处理"和平红阳"和"和平一号"2个猕猴桃品种幼芽,并在猕猴桃成株上进行高位嫁接,对其辐射效应进行初步研究。结果表明:嫁接萌芽率变化的一般趋势是随着辐射剂量的加大而降低;随辐射强度的增加,使萌发芽的死亡率加大,导致最终成活枝的比例降低。参试品种的半致死剂量在50～75 Gy之间。辐射在引起猕猴桃幼芽生理损伤的同时,亦会诱发性状变异。2个品种的茎长、叶柄长、叶片宽等性状50 Gy处理和CK间的差异均达到显著水平,2 a试验取得一致的结果,而茎直径和叶片长度,不同品种及不同年份的表现不同。辐射处理会提高性状的变异系数,增加性状的变异度,为选择提供更丰富的变异材料。表明辐射诱变在猕猴桃品种改良中有重要的研究应用价值。
In this study,Actinidia chinensis var. Hongyang and Actinidia deliciosa var. Heping No. 1 were treated with different dosages of gamma ray and then grafted on adult plants to study the radiation effect. The character variations were systematically investigated and analyzed. The results showed that as radiation dosage increased, the graft sprouting rate decreased, and the death rate of sprouting buds increased resulting in lower rate of survival shoots. Median lethal dose for studied varieties was about between 50 Gy and 75 Gy. While the radiation induced physiological damage for Kiwifruit bud, it could result in some character variations. The difference between 50 Gy treatment and CK for two varieties＇ shoot length, petiole length, leaf width et al. was significant, and two year＇s experiment got same results for these characters. As for shoot diameter and leaf length, the effect of radiation varied with varieties and experimental years. Radiation treatment could increase character＇s coefficient of variability and provide more abundant variations for selection. Therefore, the results indicated that radiation induced mutation was an useful method in Kiwifruit breeding.
出处
《北方园艺》
CAS
北大核心
2009年第5期23-26,共4页
Northern Horticulture
关键词
猕猴桃
辐射处理
诱变育种
Actinidia
Radiation treatment
Mutation breeding
