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大麥의 出穗期에關한硏究 第Ⅱ報, 우리나라 大麥 在來品種의 出穗期와 內的要因과의 關係
Y.W. HA(河龍雄),S. YASUDA(安田昭三) 한국육종학회 1977 한국육종학회지 Vol.9 No.3
217 Korean barley land-races were cultivated by fall sowing in Kurashiki, Japan in order to investigate their heading dates and to find out internal factors controlling heading date. Most of the land-races were mid-maturing, similar to the maturity of Hangmi. A few of them were very late or very early maturing. In their growth habit, most of the spring habit races belonged to the I degree and most of the winter habit races belonged to the IV degree but very few were classifield as the II or VI degree. The most influencial of the internal factors to heading date under field condition was photoperiod. The degree of spring habit and earliness in narrow sense did not have much influence.
秋播栽培 條件下에서 麥類의 播性消去 限界期에 관한 硏究
CHO C.H(曺章煥),M.W. PARK(朴文雄),W.S. AHN(安完植),J.H. NAM(南重鉉),B.Y. SEONG(成炳烈),Y.W. HA(河龍雄) 한국육종학회 1980 한국육종학회지 Vol.12 No.3
The vernalization periods required for various classes of growth habit in wheat and barley was studied in the fall sown cultivars at Suweon. The vernalization requirement for those I-VI class of winter growth habit was almost completed before the end of the year (81 days after sowing).
小麥 主要形質의 遺傳 및 選拔効果에 關한 硏究 第2報. 小麥의 出穗期에 關與하는 播性, 日長反應, 狹意의 早晩性 및 耐寒性 交配親의 選擇
B. K. KIM(金鳳九),C. H. CHO(曺章煥),Y. W. HA(河龍雄),J. H. NAM(南重鉉) 한국육종학회 1979 한국육종학회지 Vol.11 No.1
In order to select superior parents for early heading, on the basis of growth habit, shortday response, earliness in narrow sense and cold tolerance lines were examined for field heading date. A growth habit tester set was developed. In Korea growth habit degrees of Ⅲ to Ⅳ were best for early heading varieties. Most spring wheats had early field heading dates. Day light insensitive varieties which were early in narrow sense were selected for early field heading. Shortday response showed highly positive correlation with earliness in narrow sense. To test for cold tolerance the wheat was planted on 20㎝ high seed bads in Yeoncheon. The selected cold tolerant varieties showed a negative correlation with field heading date.
小麥 主要形質의 遺傳 및 選拔効果에 關한 硏究 第3報 小麥小麥育種을 爲한 主要形質의 選拔效果
B. K. KIM(金鳳九),C. H. CHO(曺章煥),Y. W. HA(河龍雄),J. H. NAM(南重鉉) 한국육종학회 1979 한국육종학회지 Vol.11 No.1
This experiment was carried out to determine heritabilities, genetic correlations, path co-efficients, selection indexes and genetic advances of major agronomic characters in wheat. Characters with high heritabilities were days to maturity, maturing period, culm length and spike length while those with low heritability were yield and yield components. In Suweon, yield was positively correlated with days to heading, days to maturity, culm length, number of grains per spike and liter weight while in Muan yield was positively correlated with maturing period and 1,000 grain weight and negatively correlated with maturing period. Genetic advance were calculated from the selection indices which were calculated on the basis of a single character and various combinations of several characters. Selection efficency was increased by 1~4% in case it was calculated from the combination two or three characters, but it showed large annual variations.
小麥 主要形質의 遺傳 및 選拔效果에 關한 硏究 第1報 小麥의 出穗期 遺傳 및 遺傳率의 地域的 變動
C. H. CHO(曺章煥),B. K. KIM(金鳳九),Y. W. HA(河龍雄),J. H. NAM(南重鉉) 한국육종학회 1979 한국육종학회지 Vol.11 No.1
Segreating F₂ populations of seven wheat crosses were planted in Suweon and in Muan to investigate the regional variations in inheritance and heritabilities of heading date. Among seven F₂ populations, the crosses Chugoku 81×Centurk and Suweon 197× Chugoku 81 gave a 3:1 early to late ratios in F₂ suggesting a single dominant early gene in Chugoku 81. The cross Norin 16×Kanto 75 gave a 7:9 early to late ratio suggesting complementary gene action with lateness dominant. The crosses Strampelli× Chokwang and Suweon 197×Sinkwang gave a 9:7 early to late ratios suggesting complementary genes action with earliness dominant. The crosses Namkwang×Suweon 215 and Norin 4×Bezostaya gave a 1:15 ratio to suggesting duplicate gene action where lateness in dominant. Heading period of the F₂ population in northern Korea teas shorter than that in southern Korea. Broad sense heritabilites in the northern area were lower than that in the southern areas.
大麥의 出穗期에 關한 硏究 第1報. 보리의 簡易播性檢定方法
Y. W. HA(河龍雄),C. H. CHO(曺章煥),K. S. MIN(閔庚洙),S. YASUDA(安田昭三) 한국육종학회 1978 한국육종학회지 Vol.10 No.1
In order to develop simple testing procedures of barley growth habit which can be practised in any place and at any time, three methods which have been used in the past were evaluated utilizing 80 varieties including the 14 standard test varieties for growth habit. After evaluating their advantages and disadvantages of each method, the simple testing procedures are proposed. In advance large population of barley varieties could be classified into two groups of spring and winter growth habit and at the same time the spring habit group into I to III degree as grown under the continuous illumination at the high temperature without any previous treatment. The remaining winter habit group could be classified into from Ⅳ to Ⅵ degree as grown under the continuous illumination at the high temperature after the low temperature treatment for three weeks.
조장환,이은섭,하용웅,이정일,Cho, C.H.,Lee, E.S.,Ha, Y.W.,Lee, J.I. 한국작물학회 1982 한국작물학회지 Vol.27 No.4
Yield loss of wheat and barley due to meteorological constraints has been analyzed in order to get the basic information, which will lead to the counter-measures for dissemination of agricultural technology and administration. These meteorological damages were analyzed on the results of percentage yield loss and mechanism of damage and the aspects of constraints were explained. The annual yield loss of wheat and barley were 21.7% by meteorological stress: Cold damage, 5.9% ; excessive soil moisture, 5.6% ; lodging, 2.9% ; drought, 3.0% ; disease, 4.3% etc. Those damages by the stresses mentioned above and rain damage were analyzed in relation to the growth stages and the degrees of damage. The predispositions and the growth of wheat and barley to those meteorological stress are also discussed. Varietal resistances of wheat and barley to those stresses were indexed and the physiological and morphological characteristics of these resistant cultivars are described. Cultural practices to minimize the damages were also reviewed.