放射線處理한 大麥 M₂集團에서 몇가지 形質의 變異性에 對한 硏究

The Variation of Several Agronomic Characteristics for M₂Mutant Lines on Irradiated Barley Seeds

This experiment was conducted to clarify the variability of several characters in M₂generation of two barley varieties. Chilbo and Youngwol-yukgak irradiated with X-ray or thermal neutron. The results obtained are as follows: 1. Phenotypic variability in irradiated populations was higher as compared with original. variety as the variants were differed with its genetic construction. 2. Mutants falling outside the variation range of original variety were observed about 2.8% for total plants. The frequencies of phenotypic variability were increased to minus variants. 3. The mean values of culm length, spike length, spike weight and number of grains per spike were decreased compared with that of control on both varieties, especially culm length in Youngwol-yukgak was shortened about 10% at the flux of 9.0×10¹²Nth/㎠.