多變量同時分析法에 依한 小麥 Monosomics 5A와 2D의 穗型分析

Y. A. CHAE(蔡永岩) 한국육종학회 1976 한국육종학회지 Vol.8 No.2

To find out whether there is difference in head shape of Caribo wheat monosomics 5A and 2D or not, a simple multivariate analysis was employed. Two measurements, head length and head width, were taken from the primary tiller per plant grown on 20cm pot with two plants. The results indicated that the head shape is different between two monosomics and the head width is the main critical determination for the difference of head shape.

大麥의 粒型突然變異 分析

Y. A. CHAE(菜永岩) 한국육종학회 1977 한국육종학회지 Vol.9 No.3

The multivariate analysis was employed to find out whether there is difference in grain shape of the two barley globe grain mutants from variety Villa (Hordeum vulgare L.) They were recessive mutants occured on the chromosomes 2 and 7. The three components of grain shape-grain length, grain width and grain thickness-were taken from the randomly chosen 100 kernels. The results indicated that the grain shape was different between the two mutants and the grain length was the critical variable for this difference.

二面交配에 의한 밀의 몇가지 量的形質의 遺傳硏究 Ⅱ. 稈長과 關聯形質

B.Y. YI(李富榮),Y.A. CHAE(蔡永岩) 한국육종학회 1983 한국육종학회지 Vol.15 No.1

This study was carried ont to know the nature of the genetic behavior of the culm length and its related characters in wheat (Triticum aestioum) by means of 6×6 half dialle cross with the varieties; Chokwang, georumil, suweon #216, Tung Fang Hung #3, Yungkwang and Chugoku #81. For all the characters studied, additive variance was significant, especially 3rd to 5th internodal lengths was controlled by additive component of genetic variance only. Additive effect was relativeby higher than dominance effect in culm length. The long culm was dominant over short calm length. Both broad and narrow sense heritabilities were high in the calm length. The internodal length was devided into three categories, namely, peduncle length, 2nd internodal length and 3rd to 5th internodal lengths. Peduncle length was mainly controlled by dominance effect, while 2nd internodal length was controlled by both additive effect and dominace effect, 3rd to 5th internodal length was controlled by additive effect only. Only genetic variance due to additive effect was significant for ear length. Both broad and narrow sense heritabilities were high.

二面交配에 의한 밀의 몇가지 量的形質의 遺傳硏究 Ⅰ. 出穗期 · 收量

B.Y. YI(李富榮),Y.A. CHAE(蔡永岩) 한국육종학회 1983 한국육종학회지 Vol.15 No.1

This study was curried out to know the nature of the yield related genetic behavior in wheat (Triticum aestivum) by means of 6×6 half diallel cross with the varieties; Chokwang, Georumil, Suwon # 216, Tung Fang Hung # 3, Yungkwng and Chugoku # 81. For all the characters studied, additive genetic variance was significant. The days to heading showed complete dominance for late heading and additive and dominance genetic variances were both significant. Yield per plants was controlled by additive component of genetic variance only, and high yield per plant showed almost complete dominace over low yield. Both broad and narrow sense heritabilities were low in the yield per plant. Ear number per plant was controlled by additive effect only, however, heritability was low. Grain number per plant was controlled by both dominance and additive variance. Over dominance to large number of grain was observed. Broad sense heritability for grain number was high considerably, but narrow sense heritability was low relatively. 100 grain weight was not sufficient to the assumption for diallel analysis in this experiment.

被子植物半數體의 遺傳學的 및 育種學的 利用

Y. A. Chae(蔡永岩) 한국육종학회 1973 한국육종학회지 Vol.5 No.2

The utilization of haploid angiosperms in genetical studies and plant breeding were reviewed. In the field of genetic studies. reviews were forcussed to the studies of simple genetic ratio, homology and basic chromosome number, ploidity, dosage effects. self-incompatibility system analysis, genetic control of chromosome pairing specificities and haploid derived aneuploids. For the utilization of haploids in the breeding. reviews were summarized along the lines of shortening inbreeding periods, doubled haploids and their combining ability, gamete selection, cytoplasmic substitution, germ plasm transfer and the efficiency of haploid methods.

纖維用亞麻의 育種에 關한 硏究 (1) 量的形質의 遺傳力과 그들間의 相關

K.Y. Chung(鄭奎鎔),E.S. Lee(李殷燮),K.H. Kang(姜光熙),Y.A. Chae(蔡永岩) 한국육종학회 1970 한국육종학회지 Vol.2 No.1

畓前作 纖維用 亞麻育種의 當面課題인 長莖 早熟品種을 育成하기 위하여 4交配組合의 F₂에서 우선 몇가지 形質에 對한 廣義의 遺傳力을 調査하였던바 얻어진 結果는 다음과 같다. 1. 草長에 對한 遣傳力은 4個組合이 서로 비슷하게 높았으며 이들의 全體平均은 0.745였다. 2. 莖長의 遺傳力은 組合에 따라 變異가 컸으며 Wiera×Horal는 0.73으로 높은 反面에 Fibura×Horal는 0.29로 甚히 낮았고 이들 4組合의 平均은 0.495였다. 3. 開花日數의 遺傳力도 組合間 差異가 커서 Wiera×Horal, Fibura×Horal는 各各 0.76, 0.78로 높은 反面에 Atlas×Fibura는 0.26으로서 가장 낮았으며 이들 4組合의 平均은 0.578이었다. 4. 分離世代인 4個組合의 F₂에서 이들 形質間의 相關은 草長對 莖長은 높은 正相關(0.7016), 草長對開花日數, 莖長對開花日數間에는 各各 0.4562, 0.5812로 比較的 높은 正相關關係를 보았다. 5. 遺傳力과 遺傳進展量으로 볼때 草長과 莖長이 높은 方向으로 選拔은 可能하나 早熟이면서 同時에 草業과 莖長이 높은 個體의 選拔은 熟期와 草長間에 높은 正相關 때문에 難點이 있다고 본다. In order to develop an efficient breeding program of flax for long fiber of high quality and early maturity, informations are needed on heritability of plant height, stem length, flowering date and on associations among these characters. Four crosses were made; Wiera×Horal, Atlas×Horal, Fibura×Horal and Atlas×Fibura. Data were taken on individual plant basis for the population and their parents. Estimation of heritability was obtained by: (수식), where VF₂is total F₂variance of the character, VP₁and VP₂are environmental variances of the respective parents. (1) Heritability of plant height for the four combinations was high with almost same values and their total average was 0.745. (2) Variation of heritability of stem length in the four combinations was some what large and their average was 0.495. (3) Average of heritability of flowering date for the four combinations was 0.578 and the Atlas×Fibura combination showed the lowest heritability (H=0.26). (4) In the segregating F₂population, plant height was positively correlated with stem length(r=0.7016**) and flowering date(r=0.4562**) and stem length showed positive correlation with flowering date (r=0.5812**). (5) Selection on plant height or stern length is possible based on the high heritability of these characters but the high positive correlation between plant height and heading date indicates the difficulty of the selection of tall height plant with early maturity.

유채의 실용형질에 대한 유전연구 -제 1 보 유채의 초장, 성숙기 및 종실중의 유전분석-

이정일,권병선,채영암,Lee, J.I.,Kwon, B.S.,Chae, Y.A. 한국작물학회 1984 한국작물학회지 Vol.29 No.1

To obtain basic information on the breeding of early maturing, short plant height rapeseed varieties, the following 7 varieties, Isuzu, Miyuki, Norin 25, Rang, Yongdang, Cresus and Tower were used in diallel crosses in 1979. Maturing date, plant height and grain weight per plant for the parents, $F_1$'s and $F_2$'s of the 7 x 7 partial diallel crosses were measured in 1981 for analysis of their genetic behavior. The results obtained are summarized as follows: 1. The days to maturing of $F_1$'s showed complete dominance for early maturing, and both additive and dominance genetic variances were significant. Number of effective factors in $F_1$'s was 3, but in $F_2$'s was 1. The degree of dominance in $F_1$'s was partial, while in $F_2$'s was complete. Both broad and narrow sense herita-bilities in $F_1$'s was high, while in $F_2$'s was low. 2. Yield per plant in $F_2$'s was controlled by additive component of genetic variance only, but $F_1$'s was different. The degree of dominance in $F_1$'s was complete, while in $F_2$'s was partial. The direction of dominance showed almost complete dominance over high yield and three effective factors was estimated. Yield per plant was controlled by recessive genes. 3. The plant height was controlled by both dominance and additive variance. Dominance was directed toward tall plant height. Number of effective factors was 2, and broad and narrow sense heritability were high in the plant height.

水稻中間母本系統들의 稻熱病抵抗性 遺傳分析

H.I. KIM(金虎一),Y.A. CHAE(蔡永岩) 한국육종학회 1982 한국육종학회지 Vol.14 No.3

To investigate the genetic behavior of the two intermediate breeding lines (IR 5533 and IR 3259), genetic analysis for resistance to rice blast in the F₂ population derived from the crosses between the two intermediate breeding lines and with their resistant parents, Tetep, Carreon, and with susceptible varieties Milyang 23 and Yushin were carried out. F₂ plants from the crosses between two breeding lines and susceptible varieties showed a good fit to a segregation ratio of 13:3, which indicating the two breeding lines had at least two resistant genes. The resistant genes in the two breeding lines were appeared to be the same or allelic because that the susceptible plants were not found among F₂ plants from the cross between IR5533 and IR3259. The varieties, Tetep and Carreon were also appeared to have two non-allelic resistant genes because that the segregation ratio in the F₂ plants was fifteen resistant and one susceptible. (wr, vr,) graph showed that IR 5533 had the most dominant genes, which suggesting the both resistant genes from Tetep and Carreon were transferred in it, whereas IR 3259 had the lower resistance than Tetep, which suggesing the resistant genes from Tetep was not completely transferred into IR3259. The positve correlation coeffeient (r) between parental order of performance and (wr,+vr,) both in lesion length and lesion number indicated that resistance was dominant.

多變量 解釋法에 依한 참깨의 品種群 分類

S. N. Ahn(安相樂),Y. A. Chae(蔡永岩) 한국육종학회 1984 한국육종학회지 Vol.16 No.3

The purpose of this experiment was to classify the varietal group and to help to choose parents for hybridization in sesame varieties. An analysis of genetic divergence as measured by Mahalanobis’ D² statistics in 1225 possible comparisons among 50 varieties of sesame for ten characters and an average link cluster analysis based on the D²’s were attempted. Classification was carried out by using principal component analysis and clustering by taxonomic distances calculated with the scores of the first six principal components. Fourteen varietal groups were classified by the average link cluster analysis based on the D² computed in ten characters. The averages of intra-group D² except for varietal group IV, VII, XIII were lower than those of inter-group D², and yield per plant and oleic acid content among the ten characters were the greatest contributorsin the inter-groups The results of the classification by the Mahalanobis’ D² were nearly coincident with those of the classification by taxonomic distance calculated with the scores of the first six principal components. In the results of principal component analysis for ten characters, 75.07 % and 83.7 % of total variation could be appreciated by the first five principal components and the first six principal components, respectively. The first principal component was highly loaded with linoleic acid content and oleic acid content, the second principal component with yield per plant, 1000-grain weight and no. of branch, and the third component with plant height and stem diameter.

器內培養에서 NAA와 BA가 땅콩의 器官分化 및 生長에 미치는 影響

H. W. Cheong(鄭會元),Y. A. Chae(蔡永岩) 한국육종학회 1984 한국육종학회지 Vol.16 No.2

Naphthalenacetic acid ( NAA) and Benzyladenine (BA) have been known to have an important influence on the organogenesis and growth of plant, which has not been studied fully in peanut. This experiment was conducted to investigate the effects of N AA and BA on in vitro culture of peanut. In shoot tip culture, many leaves were expanded when treated with over 0.5 mg/1 BA, but the effect of BA on leaf expansion was inhibited with supplementing more than 0.5 mg/1 N AA. The best hormonal combination for leaf expansion was the 0.1mg/1 NAA+0.5mg/1 BA combination in cv. Yeongho, while 1mg/1 BA alone in cv. 01. Shoot elongation enhanced with addition of 0.1 mg/1 NAA or 0.1 mg/1 BA, but inhibited in the addition of more than 0.5 mg/1 BA. On the other hand, average internode length was reduced with the increasing BA concentration. In immature leaf culture, hormonal combination of 1 mg/1 N AA and 1/mg /1 BA was the most effective on callus and bud differentiation. Thirty days long culture was proper for bud differentiation. Optimum BA concentration was 1 mg /1 for shoot development from bud and proper culturing period was 40 days. Roots were hardly initiated from regenerated shoots and the effects of N AA on root initiation was insignificant.