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放射線處理한 大麥 M₂集團에서 몇가지 形質의 變異性에 對한 硏究
Y. S. Kim(金泳相),J. S. Eun(殷鍾旋),K. H. Im(任建爀) 한국육종학회 1973 한국육종학회지 Vol.5 No.1
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/㎠.
Y. S. Kim(金泳相),J. S. Eun(殷鍾旋) 한국육종학회 1972 한국육종학회지 Vol.4 No.2
These experiment was carried out in order to study the seedling growth and the frequencies of M₂chlorophyll mutations on various moistured barley seeds which were heated as pre-irradiation treatment. Youngwol-yukgak was used as a material variety. Some results obtained are summarized as follows; 1) Reduction of seedling height, as criterion of biological injury, was greatly appeared due to irradiation only compared with pre-irradiation heat treatment. 2) The growth of seedling was more sensitive than that of root especially in low moistured seeds. 3) Pre-irradiation heat treatment at 60-70℃ for 5 hours markedly increased the chlorophyll mutation frequency.
人爲突然變異李用에 依한 小麥品種開良 第Ⅱ報, M₂世代의 稈長 및 穗長變異體選拔
Y. S. Kim(金泳相),J. S. Eun(殷鍾旋) 한국육종학회 1975 한국육종학회지 Vol.7 No.2
This experiment was conducted to select useful mutants in two wheat varieties, Youngkwang and Jaekwang, treated with gamma-ray, EMS and EI. 1,685 mutant lines in Youngkwang and 1,249 in Jaekwang were observed on the culm and spike-length compared with their mother variety in M₂ generation. The results obtained were as follows: 1. For induction of desirable mutants such as short culm or long spike length, Youngkwang had greater than Jaekwang. Otherwise mutation frequency treated with both chemical mutagens were higher than with gamma-ray. Many mutant lines were selected near the level of LD-50 in plant growth for each mutagen. 2. A few mutants were decreased above 30% for culm length, while spike length of them were appeared in the same or increased as compared with their mother vaviety. These mutants in M₂ generation were able to select both varieties. 3. 134 mutant lines in Youngkwang and 52 in Jaekwang were selected for short culm mutant, also 137 in Youngkwang and 64 in Jaekwang respectively were selected for long spike mutants.