Abstract: M₁ mutant was selected from the seeds of Acacia cunninghamia by ⁶⁰Co-r irradiation. The results of afforested experiment by using M₂ mutant showed that the growth and biomass of 3-year stands increased by 21.64% and 73.98%, respectively as compared with controls, and the stands had straight stems and earlier flower phase and fruit maturity period for 7~15 days.

Key words: Acacia cunninghamia, ⁶⁰Co-r irradiation, Induced mutant

摘要： 采用不同剂量(3000、5000、7000Rad)⁶⁰Co-r辐照肯氏相思种子,选育出诱变化株(M₁),以M₁的种子(M₂)扩种试验。观测M₁和M₂代的形态、物候,并测定过氧化物酶同功酶带谱、酶活性、蛋白质含量,结果表明,各处理的优株与对照都存在差异。在相同生态条件下,M₁代林木生长量和M₂代地上部生物量分别高于对照见11.48%~21.64%和14.62%~73.98%,以5000 Rad辐照剂量最优,其次为7000 Rad。访变个体后代表现树干直、花果期提早和种子小。

关键词: 肯氏相思, ⁶⁰Co-r辐照, 诱变