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RISS 인기검색어
- 검색키워드
- 저자 : Y. Ohta(太田保夫) (검색결과 3 건)
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고추種字의 低溫發芽性에 關한 硏究 Ⅵ. 低溫發芽性의 遺傳分析
K.S. CHOI(崔寬淳),Y.H. OM(嚴榮鉉),Y.OHTA(太田保夫) 한국육종학회 1983 한국육종학회지 Vol.15 No.1
To clarify the inheritance mode of germination ability at low temperature in red pepper, heterosis and combining ability for days to germination and germination coefficient were estimated with a 8-parent diallel crosses, and gene actions for days to germination also done with F₁ generation of the 8-parent diallel crosses and Frond F₂ generations of a 4-parent diallel crosses In addition, the additive and dominance components of variance, heritability and genetic advance for days to germination were estimated with various segregating generations made from the 4-parent diallel crosses. Significant positive heterosis was recorded in days to germination, but significant negative heterosis in germination coefficient. They were about 6 and 8 percent, respectively. Both GCA and SCA were highly significant. and variance of GCA was much larger than that of SCA. “KS2-2” and “Cheonanjaelae” showed significant negative GCA effects on days to germination, whereas they did significant positive GCA effects on germination coefficient. But “Mexico” and “Hoso Yatsu Busa” reversed. On the other hand, Cheonanjaeiae/Mexico, Hoso Yatsu Busa/Mexico, KS2-2/Daehwacho and Saegochu/Putgochu expressed significant SCA effects to the direction of selection for good germination. Vr/Wr graph for days to germination indicated partial dominance for slow germination. Especially “mexico” with slow germination deviated far off the regression line, sugessting if may have a different genetic background. In F₂ populations of most combinations, days to germination was seemingly controlled by polygenes, indicating its normal distribution with one peak., whereas it was controlled by a few major genes in the F₂ populations of Saegochu/ Mexico and Putgochu/ Mexico producing two peaks in their curves. Average heritabilities of days to germination in the F₂ generations were 76.1% and 52.8% in the broad and narrow sense, respectively. Based on heritability in. the narrow sense and F₂ variance, estimated genetic advance was expected to he larger in the crosses of Saegochu/KS2-2 and Putgochu/KS2-2. In the variation components of segregating populations, additive component was higher than dominance one. So it could be possible to make the genes controlling days to germination to be fixed effectively into a homozygouis line. Days to germination in petri-dish was positively correlated with that in soil (r=0.7546**), and the former could substitute for the latter.
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고추種字의 低溫發芽性에 關한 硏究 Ⅱ. 果実의 登熟 및 貯藏이 種子의 低溫發芽性에 미치는 影響
K.S. Choi(崔寬淳),Y.H. Om(嚴禜,鉉),C.J. Yu(兪昶在),Y.Ohta(太田保夫) 한국육종학회 1982 한국육종학회지 Vol.14 No.1
The effects of maturity and after-ripening of pepper seeds on germinability at low temperature (10℃) and also the effects of storage duration and condition of seeds were studied. 8 pepper varieties were used in the study, which produce typical germinability at low temperature. There was varietal differences in percentage of seed filling as influenced by days after flowering. In the protein content, “Saegochu” showed the peak about 40 days after flowering. and “Mexico” and “Texans” it about 50 days. At low temperature germination of pepper seeds decreased remarkably at the immature stage, and varietal. differences were recognized as nonsignificant, but it as significant at about 45 days after flowering. The varieties with high and low germinabilities at low temperature produced some germination about 35 and 50 days after flowering, respectively. The former increased sharply in germination coefficient around 60% seed weight of fully developed seed, but the latter remained unchangeable. There was significant simple correlation between germination coefficient, dry weight of 1000 seeds, days after flowering and protein content. In partial correlation, germination coefficient and days after flowering were correlated indicating that similar correlation would be found in the different dry weight of 1000 seeds, but germination coefficient and dry weight of 1000 seeds were not correlated suggesting that they are not correlated within a few same days group after flowering. Days to after-ripening showed significantly positive correlation with germination coefficient as days after flowering shortened. But pepper seeds, which was harvested about 35 or 40 days after flowering and after-ripened for 10 days, has the better germinability at low temperature. The difference in the germinability of pepper seeds stored between low and room temperatures may be attributed to temperature rather than humidity. The germination was highest at normal harvest, so pepper seeds can be considered as nondormant. Varietal differences in the germination at low temperature could be detected within 6 months in the case of storage under room temperature, and within 18 months in the case of desiccator storage under room temperature.
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B. M. Kae(桂鳳明),H. Kikuchi(菊池文雄),Y. Ohta(太田保夫) 한국육종학회 1984 한국육종학회지 Vol.16 No.2
Six populations-P₁, P₂, F₁, F₂, B₁ and B₂-each of three upland cotton(Gossypium hirsutum L.) crosses were used to evaluate gene effects in the inheritance of six useful agronomic characters by Gamble’s six-parameter model for the analysis of generation means. The additive gene action governed the staple length and lint percentage, so that the individual selection for these characters in F₂ generation will be very valid steps. Since the additive gene actions of boll weight and days to flowering were equal to the dominant gene actions of these, since the number of bolls per plant and lint yield per plant were governed by the dominant gene actions, there are hopeful that the desirable types for those characters will be selected by the effective steps, according to increasing the additive gene effects of those in the following generation.
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