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水稻 量的形質의 遺傳에 關한 硏究 第2報. 冷水處理에 依한 벼 二面交雜 F₂ 集團의 組合能力 差異
B. T. Jun(田炳泰)J. D. Yea(芮鍾斗) 한국육종학회 1984 한국육종학회지 Vol.16 No.2
The inheritance of some agronomic characters in rice(Oryza sative) was studied in F2 generation of 7 patents diallel cross in 1982. Each of two sets of F₂ populations including parents were grown under irrigated cold water (20℃) and natural water conditions. The average variances for all the characters studied were greater under cold water condition than under natural. The combining ability analysis showed that additive genetic variance was generally predominant for all the characters regardless of water temperatures. Most of characters showed over dominance under cold water condition, while they did partial dominance under natural condition.
水稻 量的形質에 關한 遺傳硏究 第1報 水稻 입형에 粒型 關한 遺傳分析
B. T. Jun(田炳泰),K. Y. Chang(張權烈) 한국육종학회 1984 한국육종학회지 Vol.16 No.1
For clarifing the inheritance of morphological traits such as length, width, thickness and weight of rice grain, F₁ progenies of seven crosses and four F₂ populations from five parents were empoloyed in greenhouse and field at Suweon in 1983. No significant difference was found between reciprocal crosses in the grain characteristics of F₁ progenies. Segregation mode of grain length in F₂ population showed nearly normal distribution under both field and greenhouse except that of width and thickness, which were slightly propended to the narrower and the thinner parents. However, the distribution of grain weight in F₂ segregation was skewed toward the lighter parents so that light grains appeared to be partially dominant over heavy grains. The heritability estimates of the grain characteristics were considerably high and the order of magnitude was weight > width > length > thickness in field, but was width > weight> length > thickness in greenhouse, respectively. Grain weight showed highly positive correlations with length, width and thickness in both environments. Direct effects of grain characteristics for the increase of grain weight in path analysis were higher in the order of thickness>grain length/width ratio in field, but length>thickness> width in greenhouse.
B. T. JUN(田炳泰),J. C. KOH(高在哲),S. K. LEE(李壽寬),K. Y. CHANG(張權烈) 한국육종학회 1978 한국육종학회지 Vol.10 No.2
The inheritance of resistance to brown planthopper (Nilaparvata lugens Stal.) was studies in six rice varieties made with three susceptible varieties, Milyang No. 21, 23, 29 and three resistant varieties, Milyang No. 30, 34 and IR 34. Seedling reactions to brown planthopper in parents and hybrid populations were checked individually, and the results obtained are summarized as follows. Single dominant genes that are allelic to Bph 1 condition the resistance in Milyang No. 30, and Milyang No. 34. It was also found that the resistance gene in these two varieties was as same as in IR 34, which was known as resistant variety. Milyang No. 21. 23 and 29 varieties were susceptible varieties, and were conditioned by a single recessive gene.
K.Y. CHANG(張權烈),B.T. JUN(田炳泰) 한국육종학회 1978 한국육종학회지 Vol.10 No.2
Four by four diallel cross analysis was employed to investigate the nature of actions and distrubtion of genes involved in the inheritance of stripe virus disease in rice varieties. Milyang,No. 15, Tongil, Norin No.6 and Chukoku No. 46 were selected as the parental varieties, and these parents and their corresponding F’₂s were grown to count the infested degrees in percentage. The diallel analysis revealed that resistance to stripe virus disease was polygenetically inherited and exhibited partial dominance in all varieties used, except three varieties-Milyang No. 15, Tongil and Chukoku No. 46-Which are resistant varieties to stripe virus diseases. The results also showed that Norin No.6 was susceptable variety to stripe virus disease, and among three resistant varieties, Tongil variety is better variety than Milyang No.15 and Chukoko No. 46 in order to breed the resistant varieties to stripe virus disease.
S. J. Choi(崔相鎭),B. T. Jun(田炳泰) 한국육종학회 1984 한국육종학회지 Vol.16 No.3
This study was conducted to find out the genetic characters for chalkiness of rice kernels from partial diallel crosses with four varieties. Values of genetical components were estimated by diallel analysis in F₂ seeds and distributions of the degree of chalkiness were observed. Clear was incomplete dominance to chalky with one major gene and additive gene effect was higher than dominant gene effect. Heritability was very high in both narrow and broad sense. Bi-modal distributions with dominance for clear grain were shown in Japonica × Japonica and Indica × Indica crosses, while Japonica × Indica crosses showed only higher number of grains distributed to the clear. Transgreessive segregations were found to the chalky side in clear × clear cross and Botheclear side in chalky × chalky cross.