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Isogenic Lines을 利用한 小麥品種의 春播性遺伝子 分析 第Ⅱ報 春播型交配母体에 對한 春播性遺伝子 究明
J. H. Nam(南重鉉),C. H. Cho(曺章煥),Y. A. Chae(蔡永岩),S. G. Yang(梁承均) 한국육종학회 1983 한국육종학회지 Vol.15 No.3
This experiment was carried out to identify the gene for the vernalization (Vrn) using isogenic tester lines with Vrn 1, Vrn 2, Vrn 3 and Vrn 4, respectively, in the spring wheat cultivars, which are being used in breeding program for early maturity. Pavon 76 and Bb-cal were appeared to share Vrn 3 gene, and also each appeared to carry an unidentified dominant gene, respectively. K 15 was found to carry another gene. Newly identified Vrn genes from Pavon 76, Bb-cal and K15 in this study are certainly different from those hitherto identified i,e, Vrn 1, Vrn 2, Vrn 3 and Vrn 4. Detailed further study is required to know whether these genes are identical or not. Both Tesia 79 and Imuris 79 seemed to carry two dominant Vrn genes even though further study is required.
J. H. Nam(南重鉉),C.H. Cho(曺章煥),M. W. Park(朴文雄),E. S. Lee(李殷變),W. S. Ahn(安完植),Y. S. Kim(金泳相) 한국육종학회 1984 한국육종학회지 Vol.16 No.2
Effect of photoperiod on the thirty winter and spring wheat cultivars vernalized was studied in the green house controlled under the temperature of 25℃ (day) and 20℃(night), and at the photoperiod from 8 to 24 hours. Among the wheat cultivars tested, there showed less heading response by photoperiod increased in early maturing cultivars than that in late maturing cultivars. More differences of cultivars in heading appeared under shortday condition than that in long-day condition.
Isogenic Lines을 利用한 小麥品種의 春播性遺伝子 分析 第Ⅲ報 主要育成品種의 春播性遺伝子 究明
J. H. Nam(南重鉉),C. H. Cho(曺章煥),Y. A. Chae(蔡永岩),B. H. Hong(洪丙憙) 한국육종학회 1984 한국육종학회지 Vol.16 No.1
This experiment was conducted to clarify the genetic nature for vernalization gene using isogenic tester lines with Vrn1, Vrn2, Vsn3 and Vrn4 respectjvely, and for lateness gene in the major Korean wheat cultivars, which are used in breeding program for early maturity. Wheat cultivars, Suweon 210, Cheonggemil and Chugoku 81 were determined to carry two dominant Vrn genes such as ; Suweon 210 had Vrn 3 and Vrn 4 ; Cheonggemil had Vrn 2 and Vrn 4 ; Chugoku 81 had Vrn1 and Vrn4, Milyang 11 had one Vrn4 gene and Geurumil did not have any Vrn gene at all. Olmil appeared to possess no-known Vrn genes so far identified but has an additional Vrn for vernalization. This new gene may be different from the known Vrn1, Vrn2, Vrn3 and Vrn4. A recessive gene for lateness (P) which is independent from Vrn genes was identified in Suweon 210, Cheonggemil, Milyang 11, Chugoku 81 and Olmil. This new gene was determined to prolong to days of flag leaf emergence which required 20-day vernalization period.
Isogenic Lines을 利用한 小麥品種의 春播性遺伝子 分析 第Ⅰ報 主要品種의 播性程度分類 및 春播性遺伝子 確認
J. H. Nam(南重鉉),C. H. Cho(曺章煥),Y. A. Chae(蔡永岩) 한국육종학회 1983 한국육종학회지 Vol.15 No.3
These experiments were carried out, to classify the degree of vernalization requirement and to reconfirm the genes for vernalization of the isogenic tester lines of Triple Dirk, each of which are known to carry a single dominant gene for vernalization, namely Vrn l, Vrn 2, Vrn 3, and Vrn 4, respectively. 1. The degree of vernalization requirement, designated as I, II, III and IV of elevev wheat cultivars was classified : Pavon 76 as I; K 15, Bb-cal, Tesia 79 and Imuris 79 as II; Suweon 210, Cheonggemil, Milyang 11 and Chugoku 81 as III ; Geurumil, as IV. 2. Isogenic lines of Triple Dirk, known to carry each of Vrn 1, Vrn 2, Vrn 3 and Vrn4, respectively, were confirmed that each tester lines carries a pair of dominant gene for spring growth habit.
J.H. NAM(南重鉉),C.H. CHO(曺章煥),B.H. HONG(洪丙惠),B.K. KIM(金鳳九) 한국육종학회 1982 한국육종학회지 Vol.14 No.3
This experiment for evaluation method of winter hardiness, relationship among the winter hardiness related traits and their relations with heading time in wheat were carried out. The mean squares estimated among cultivar and heritabilities estimated were higher at 20cm high ridges than the 10cm high ridges. The rate of winter killed plant remarkably noticed and easier to identify the varietal differences at 20cm high ridges, The correlation coefficients estimated between winter hardiness related traits was highly positive, significance especially between winter killed tillers and plants were 0.8627**, -0.8238** at Suweon and Yeoncheon. Also, Correlation coefficients estimated among the heading time and winter killed leaves, tillers and plants were -0.2283**, -0.2820** and -0.3050, respectively. High ridge top seeded method for evaluation of winter hardiness were effective to distinguish its varietal differences and found to be the methods that can screen number of varieties and segregating materials.
C.H. CHO(曺章煥),B.H. HONG(洪丙憙),J.H. NAM(南重鉉),B.H. CHANG(張炳浩) 한국육종학회 1980 한국육종학회지 Vol.12 No.2
To investigate the genetic and ecological variation of culm length of wheat the different daylength has been applied to major wheat varieties planted at greenhouse in Suweon. Standard errors of culm length were larger at 12 and 8hrs day length than that of 24hrs. Variations of culm length due to different photoperiod were more remarkable in medium and short culms than that of long one. Number of genes controlling culm length of variety Robin #2 was more or less 2 genes. This study has been conducted to investigate the genetic and ecological variation of wheat calm length measured from those plants grown at greenhouse. The results are as following. 1. The calm length of the winter wheat was highest under 12hrs daylength, while that of the spring wheat was highest under 8hrs daylength. Standard errors of culm length was larger under 12 and 8hrs daylength than that of 24hrs daylength condition. 2. The culm length was shortest under the 24hrs daylength compare to under 12 or 8hrs while it was highest under 12hrs. Short and medium culm length varieties were photo insensitive but those of long culm length were photo sensitive. 3. There are many types of varietal differences for the culm length under the daylength conditions. Highest culm length group under 12 and 8hrs contition was classified. The semi-dwarf varieties that did not change their plant heights under 8 and 12hrs conditions were Hira, Yecora Resel, Sava, Sturdy, Saric 70, Sekidorisai 66 etc. 4. Varietal difference of culm elongation was noticed between 8hrs and 12hrs daylength condition. On the basis of the evidences obtained from this experiment, it may be concluded that the genetic studies related to culm length should be carried out under the most favorable conditions for calm elongation. 5. Correlation coefficients estimated between culm length and heading or maturity were negative but insignificant, but their correlations were highly significant between photo treatments. 6. Calm length of F₁ was intermediate to the range of F₂ population which seems to be distributed normally. In this regard the gene involved with calm length seemingly inherit additively. Statistical analysis for the involved genes for calm length suggested 2 genes for the semidwarf variety Robin #2 was more or less 2 genes.
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.
CHO C.H(曺章煥),B.K. KIM(金鳳九),B.H. HONG(洪丙憙),J.H. NAM(南重鉉),K.W. CHUNG(鄭吉雄) 한국육종학회 1981 한국육종학회지 Vol.13 No.1
This study was subjected to clarify the physiological factors associated with heading and maturing of wheat and their genetic studies, relationship among heading time and involved factors as well as selection efficiency to serve for improvement of early maturing and high yielding wheat varieties. The results obtained to the present time were summarized as followings. 1. Physiological factors associated with heading time of wheat can be represented by growth habit, photowresponses, especially heading response to high temperature-shortday response, earliness in narrow sense and winter hardiness. In the areas where cold damage is negligible three factors except winter hardiness would be the major factors associated with heading time. Determination of growth habit was possible by growing materials at high temperature and longday condition with different vernalization periods. Photo-responses could be determined under high temperature-shortday and earliness in narrow sense under high temperature-longday. 2. Spring growth habit is controlled by four major genes Vrn₁, Vrn₂, Vrn₃ and Vrn₄. These genes are dominant over winter growth habit and Vrnl is found to be epistasis to the other Vrn genes. Winter growth habit is recovered. 3. Photo-insensitivity and earliness in narrow sense are controlled by one or two major genes in some crosses while polygenic inheritance are also observed in some. crosses. 4. Winter hardiness is quantitatively inherited, thus controlled by many genes 5. Studies on the earliness with segregating material planted in the field proved that this trait is determined by one or two major gene(s). However, in some crosses it was found to be polygenic. 6. Field heading time and photo-responses, earliness in narrow sense and growth habit were highly correlated each other but winter hardiness exhibited negative relations with field heading time and involved physiological factors. Thus, winter susceptibility was a disadvantageous trait for improvement of early maturing varieties. 7. Heritabilities estimated for heading time was considerably high regardless growing conditions. However, highest heritability was estimated for the materials grown under high temperature and shortday condition. 8. In relationship between heading time and grain yield, early maturing lines frequently damaged, particularly young spike primordia, by low spring temperature and increased sterile spikelet it will be desired to recombine some degree of winter growth habit, low temperature adaptability and photo-insensitivity. High grain weight and grain plumpness should also be considered in selection procedure for improving early maturing wheat varieties.
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).