在來種大豆와 野生種大豆의 種實變異에 關한 硏究

S. H. Kwon(權臣漢),K. H. Im(任建爀),J. R. Kim(金在利) 한국육종학회 1972 한국육종학회지 Vol.4 No.1

本 試驗에서는 中部以南 全域에서 蒐集한 一般農家栽培種, 命名된 在來品種, 野生種, 美國, 臺灣, 越南에서 導入한 品種, 그리고 野生種과 栽培種間의 交配後代에 對한 種實重의 變異를 調査하였다. 1. 農家傳來種의 種實重의 分散은 뚜렸한 2個의 頂點을 갖이는 曲線을 그리고 있으며 이는 우리나라 現在 大豆를 크게 두個 集團으로 區分해 볼 수 있음을 나타내는 것으로 그 平均 百粒重은 各各 12g와 24g 이었다. 2. 農家傳來種의 分布를 보면 南部地方에는 小粒種이 많이 栽培되고 있고 中部地方에서는 大粒 乃至中粒種이 栽培되는 傾向을 알 수 있었다. 一般的으로 우리나라 大豆는 外國種에 比해 大粒型이 많이 栽培되고 있으며 全國에서 蒐集한 500餘種에 對한 平均百粒重은 22.2g이었으며 最高 44.8g서부터 最低 6.2g까지였다. 3. 우리나라 栽培種의 最低 百粒重 6.2g는 野生種中間型 百粒童 7.4g보다 작았다. 野生種과 栽培種間의 交雜은 容易하였으며 F₁와 F₃의 種實重은 兩母品種 사이에 分布하였으며 F₂의 一粒重 平均은 兩親의 幾何平均에 近似하였다. This investigation was conducted to determine the variation of seed weight for land races, local named varieties, wild type collections, some introduced varieties, and F₂and F₃generations of a cross between cultivar and wild type of soybeans. Land races currently grown by farmers were consisted with distinctly different two groups and averages of seed weight of the groups were 12g and 24g respectively. In general, the soybenan seeds grown in southern part of Korean peninsular were smaller than the seeds collected in middle part of the peninsula. The cultivars grown in Korea are relatively large in seed size in comparison with the varieties grown in other countries. The seed weight of the collected land races ranged between 44.8 grams per 100 seeds and 6.2 grams and the average weight was 22.2 grams. Seed weight of F₂and F₃generations of a cross between wild and intermediate type ranged between parents and the average weight per seed of F₂generation was close to the value of geometric mean of the parents.

水稻 突然變異系統의 세가지 形質의 遺傳硏究

S.H. KWON(權臣漢),J.L. WON(元鍾樂) 한국육종학회 1978 한국육종학회지 Vol.10 No.2

Rice mutant having brown spot color on lemma, earliness and long culmness was obtained from a population of X-irradiated Jinheung variety. To Analyse gene controlling the mutant character and to verify genetical relationships among the three characters, crossing between mutant and mother variety was made. Segregation in F₂ of each character revealed that the charactors were controlled by monogenic recessive gene and the three characters were inherited simultaneously. This implies that the mode of inheritance might be resulted by either pleiotropism or close linkage relationship of the three characters, and a definite answer will become clear by further experiments.

栽培條件이 大豆의 生育 및 種實收量 미치는 影響

S.H. KWON(權臣漢),J.R. KIM(金在利),B.W. KIM(金病友),J.W. LEE(李鍾華) 한국육종학회 1978 한국육종학회지 Vol.10 No.1

The objective of this study was to investigate the effects of planting date and spacing in field performance of five soybean varieties different in plant types. The results obtained were summarized as follows: 1. Number of days of flowering, fruiting period, and maturity were reduced with delayed planting dates. Number of days to flowering of late maturing varieties was more affected than the early maturing varieties by delayed planting, but the influence was less remarkable than those to maturity date. There was significant differences between earlier and later plantings in such characters as seed weight, plant height, number of nodes and pods per plant. However, the reverse was true for the variety Clark and yield was remarkably reduced with later planting as compared to other varieties. 2. Plant spacing did not significantly affect on yield, seed weight and number of nodes per plant. Although plant height, number of branches and pods per plant were affected by spacing, the influence was less than those of planting date in these characters. 3. Maximum yield was observed in planting on May 21 and optimum spacing for high yielding was 60㎝×10㎝ in this experiment. 4. Interaction between planting date and spacing was closely related to yielding and it was considered that proper planting date and spacing were able to result in higher yielding.

突然變異育種의 現況과 展望

S.H. KWON(權臣漢),J.L. WON(元鍾樂) 한국육종학회 1979 한국육종학회지 Vol.11 No.2

大豆의 放射線感受性과 突然變異率

S.H. KWON(權臣漢),J.L. WON(元鍾樂),J.R. KIM(金在利) 한국육종학회 1980 한국육종학회지 Vol.12 No.3

In order to obtain the basic information for the soybean mutation breeding, the seeds were treated with various gamma-ray doses of 10, 20, 30, 40, 50kR, and the response to different characters at seeding and harvest stage and mutation frequency using chlorophyll deficient mutation were investigated. Plant height, number of pods per plant and survival rate seemed to be appropriate characters to decide the radiosensitivity, and radiation doses of 20~30kR are recommended for mutation breeding. Chlorophyll deficient mutations were classified with xantha, chlorina, chlorotica and maculata types, and their frequency was 1.46 and 2.44% in M₂ plant basis at 20 and 30kR, respectively.

大豆品種間 耐冷性의 差異에 關한 硏究

S.H. KWON(權臣漢),Y.I. LEE(李榮日),J.R. KIM(金在利),I.C. SHIN(申仁徹) 한국육종학회 1980 한국육종학회지 Vol.12 No.2

Germination test with 1,429 Korean native soybean lines was made at 10℃ for the selection of cold tolerant lines. Out of the entries tested, 62 cold tolerant lines and 56 cold intolerant lines were identified. Most of cold tolerant lines were originated from the provinces of Kyonggi and Kangwon, and the cold intolerant lines were collected from Kyongnam and Cheonnam provinces of Korean Peninsula. Most cold tolerant lines have black and brown seed coat color, while the cold intolerant lines have yellow and green seed coat color. For a field test, the selected two groups were planted twice on 4 April and 15 May 1979, and emergence, plant height and other related agronomic characters were investigated. Percent of emergence and plant height in the cold tolerant group were significantly higher than those identified as cold intolerant lines at early growth stages under the chilly spring condition. Number of nodes and branches and plant height at the time of harvest were not increased in cold tolerant lines, but number of pods was significantly increased.

突然變異育種을 위한 推薦放射線 照射線量

S.H. KWON(權臣漢),J.L. WON(元鍾樂) 한국육종학회 1978 한국육종학회지 Vol.10 No.2

熱中性子에 依한 大豆의 耐開莢性 品種育成

S. H. Kwon(權臣漢),K. H. Im(任建爀),J. R. Kim(金在利) 한국육종학회 1973 한국육종학회지 Vol.5 No.2

In order to obtain shattering resistant mutants in a variety Chungbuk-Baik, which is extremely susceptible in shattering at maturity, seeds of the variety were irradiated with thermal neutrons. The results obtained for three generations (M₆-M₈) are summarized as follows: 1. Shattering in the 5 selected lines were singnificantly decreased as compare with the control variety Chungbuk-Baik and singificant differences in shattering among selected lines and years were not found. 2. Yield at maturity without consideration of shattering was slightly lower in the selected lines as compare to the control variety Chungbuk-Baik, whereas seed size, number of branches, number of pods and lodging were similar to those of control. 3. A selected line CS-15-15-P was of great promise in shattering and other agronomic characters.

大豆 葉의 綠色程度와 葉綠素含量 및 收量間의 關係

S.H. KWON(權臣漢),J.R. KIM(金在利) 한국육종학회 1979 한국육종학회지 Vol.11 No.2

Seventeen Korean soybean varieties and 28 introductions from several countries were studied to determine the difference in the amount of chlorophyll and the relationships of visual observation in green pigmentation with chlorophyll content and seed yield. The amount of chlorophyll a, chlorophyll b and total chlorophyll in tested varieties showed considerable variation. The chlorophyll a ranged from 2.44 to 7.32 mgr and the chlorophyll b from 2.88 to 9.16 mgr. In total chlorophyll, the variety Lincoln introdued from U.S.A. had much higher content as 16.22 mgr and the variety P_5 from Vietnam showed much lower content as 5.32 mgr than other varieties, respectively. Highly significant relationships were found for chlorophyll a to chlorophyll b and for chlorphyll a and b to total chlorophyll. However, no relationship between visual differences in greenness and total chlorophyll with seed yield in this experiment suggest that visual observation could not accounted for the significant means to determine the quantitative differences of chlorophyll and seed yield in soybeans.

大豆品種間의 放射線感受性差에 關한 硏究

S. H. Kwon(權臣漢),K. H. Im(任建爀) 한국육종학회 1973 한국육종학회지 Vol.5 No.1

In order to determine differences of radiosensitivity of soybean varieties collected from Korea, U.S., Taiwan and Vietnam, dried seeds were irradiated with gamma-rays. The criteria. of radio-sensitivity were judged with seedling height and root length. 1. Varietal differences in radio-sensitivity were found and 50 per cent of growth retardations were observed from 10kR to 20kR; in seedling height and from 25kR to 35 kR in root length. Difference of growth retardation in root length was not found above 45 kR. 2. Dose-respons curves could be approximated by following general equation irrespective of the varietal sensitivity. l/lo=l-(l-e-KD)⁴. D is an experimental dose and K value is sensitivity constant. The radiosensitivity of a variety can be expressed only by the K value in the equation irrespective of dose used. 3. Positive correlation between seedling and root growth was shown in D_(50). By comparison degree of inhibition of seedling and root growth with that of average in control, It was indicated that two characters were same at low doses, while inhibition in seeedling growth was more severe than root growth at high closes. Therefore it was found that in soybean seedling height was more useful as a criterion for radio-sensitivity than root length.