放射線을 利用한 大豆의 早熟性新品種育成

• 영문명: A New Soybean Variety, KEX-2, Selected from a X-ray Irradiated Population
• 발행기관: 한국육종학회
• 저자명: S.H. Kwon(權臣漢) K.H. Im(任建爀) M.S. Kim(金萬壽)
• 간행물 정보: 『한국육종학회지』Vol.5 No.1, 11~16쪽, 전체 6쪽
• 주제분류: 농수해양 > 기타농수해양
• 파일형태: PDF
• 발행일자: 1973.06.30

영문 초록

The soybean variety Kumkang-Dai-Rip is one of the leading varieties in the middle part of Korean peninsula and possesses many excellent characters except the late maturity. The lateness bring about difficulties in the barley-soybean cropping system widely practiced in the middle part of Korea. For this reason, the aim of this study was to obtain early maturing mutant without changes in other characters from the original variety Kumkang-Dai Rip. 4,000 M₁seeds derived from X-ray irradiation were planted in 1963. From these progenies, several early maturing mutants were selected and various characters were studied for 7 years period up to 1972. Eventually one promising line, KEX-2, was selected and the important characteristics are summarized in following. 1. The selected line, KEX-2, was matured 11 days earlier than the original variety, Kumkang-Dai-Rip and more or less similar to the variety Chungbuk-Baik which is considered as standard variety for maturity in the middle part of Korean peninsula. However, the yield increase in 128㎏ per hectare in the selected line KEX-2 with compare to the original variety was observed. 2. In the selected line KEX-2, slight decreases in seed weight and oil content, and increases in lodging, plant height and number of pods per plant from the original variety Kumkang-Dai-Rip were found, however, the differences were not statistically significant. 3. The heritability values for maturity and flowering were 81.1% and 81.3%, respectively. Fairly large heritability values were also observed for the seed weight and seed yield. These results indicate that the selection for the important agronomic characters in KEX-2 is considered to be reliable. 4. The selected line KEX-2 was significantly different from the original variety in maturity, seed yield and protein content, and from the check variety Chungbuk-Baik in plant height, seed weight and protein content. These results imply that the selected line KEX-2 has been originated as a mutant induced by X-ray irradiation from the original variety Kumkang-Dai-Rip. 5. The selected line KEX-2 will be a first soybean variety improved by means of mutation breeding in Korea and it will be adapted in barley-soybean cropping system in the middle part of Korean peninsula.

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LITERATURE CITED