• Journal of the Korean Society of Tobacco Science
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• v.17 no.1
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• pp.57-61
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• 1995

Black shank(Phytophthora parasitira roar. nicotianae) resistant burley tobacco (Nicotiana tabacum L.) germplasms, KB 104 and KB 106, were developed by Korea Ginseng & Tobacco Research Institute. KB 104 was developed from the single cross of Burley 21$\times$Newton 77, using a modified pedigree method. KB 104 was highly resistant to black shank, and its agronomic characteristics and chemical contents were comparable to those of Burley 21, and value per 10a was slightly higher than Burley 21, KB 106 is a maternally derived doubled haploid made by N. africana method from the single cross of Burley 21$\times$ Va 509. KB 106 was also highly resistant to black shank, had two more harvestable leaves per plant and flowered three days later than Burley 21 did. Total alkaloid and nicotine contents of KB 106 were significantly lower than those of Burley 21. But its nornicotine content was higher than Burley 21 5. Key wads : Burley tobacco germplasm, Black shank resistance.

• Journal of the Korean Society of Tobacco Science
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• v.14 no.2
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• pp.97-103
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• 1992

KB 101 is a bacterial wilt(Pseudomonas solanaceamm E.F. Smith) and black shank (Phytophthora nicotianae Breda de Haan Var. nicotianae Waterhouse) resistant cultivar of burley tobacco (Nicotiana tabacum L.) KB 101 was developed by the Korea Ginseng&Tobacco Research Institute, and released in 1987. KB 101 was developed from a single plant selection in the F2 generation derived from the double cross, [(Burley 21X Burley 37) X (Burley 64X Ky 16)]. Burley 37 and Burley 64 were the source of resistance to bacterial wilt and black shank. Yield trials were conducted in the Fs through F6 generations at the four Exp. Stn. of Korea Ginseng &Tobacco Research Institute as JB 7705-1. On-farm yield trials were conducted in the F7 through F9 generations at the 45 locations of burley tobacco growing area from 1984 to 1986 as KB 101. KB 101 has an erect growth habit similar to that of Burley 21: plant size is larger and has more leaves than those of Burley 21. It is late maturing cultivar that flowers approximately 3 days later than Burley 21. The physical characteristics and chemical composition of KB 101 were similar to those of Burley 21.

• Journal of the Korean Society of Tobacco Science
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• v.2 no.1
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• pp.28-37
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• 1980

This experiment was carried out to evaluate the utilization of F, hybrids using cytoplasmic male sterility in Burley tobacco. Four cytoplasmic male sterile lines and their male-fertile counterparts and 21 Fi hybrids and their parents were evaluated for their agronomic performance in replicated field trials. Some F1 hybrids were comparable to Burley 21, the only Burley cultivar in Korea. Among 21 F1 hybrids, MS L8$\times$Burley 49 and three other hybrids showed 2-11% and 1-5% higher yield and price per kg than Burley 21, respectively.

• Journal of the Korean Society of Tobacco Science
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• v.19 no.2
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• pp.83-91
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• 1997

The vein-necrosis strain or potato virus Y (PVY-Vff) and black shank (Phytophlhora parasitica roar. nicotianae) causes severe damage on burley tobacco(Wicotiana tabacum L.) in Korea, A new burley tobacco resistance to PVY and black shank, KB 110, was developed by Korea Ginseng and Tobacco Research Institute. It was developed from the cross of Burley 21 with TC 591 in 1990, and was backrossed to Burley 21 in the following season. TC 591 has resistance to PVY and moderate resistance to race 0 of black shank, but it is susceptible to tobacco mosaic vim (TMV). KB 110 was evaluated for its resistance to PVY, TMV and black shank in the greenhouse and at fields for preliminary and performance trials. KB 110 which has secreting glandular trichomes was resistant to PVY-VN, TW and black shank. It had an erect growth habit and two more leaves per plant than that of Burley 21, and matures two to three days later. It yielded approximately 3 percent more cured leaf than the standard cultivar Burley 21, but other plant characteristics were very similar to those of Burley 21. It had acceptable standards for chemical and physical characteristics of lured leaf on regional farm test in 1995-1997. KB 110 produced average yields of good quality tobaccos and was appeared to be resistant to PVY inwhere occurrence of the virus are severe chronic at burley growing area.

• Journal of the Korean Society of Tobacco Science
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• v.16 no.1
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• pp.57-64
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• 1994

Burley tobacco (Nicotiana tabacum L.) KB 108 was developed from a single cross between KB 104 and TC 591 which was developed from a cross between Burley 49 and Tobacco Introduction 1406. It was tested for its resistance to black shank, potato virus Y(PVY), TMV and agronomic characteristics under field conditions. KB 108 has resistance to tobacco mosaic virus(TMV) and necrotic strain of potato virus Y(PVY-VN) with secreting glandular trichomes. It has also moderate resistance to black shank caused by phytophthora parasitica val. Nicotianae. KB 108 has an up-right plant growth habit similar to Burley 21. It flowers about 1-2 days later than Burley 21. The leaf width and length of KB 108 are approximately 3 cm wider and longer than those of Burley 21. The yield of KB 108 was higher 4%, nearly equal in value per kg compared to Burley 21.

• Journal of the Korean Society of Tobacco Science
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• v.25 no.1
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• pp.39-46
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• 2003

The essential oils from Burley 21 tobacco was isolated by using the SDE (Simultaneous Distillation & Extraction) apparatus coupled with gas chromatography and mass spectrometry analysis. Burley 21 tobaccos were divided and collected by six stages at intervals of five days during air-curing process. Air curing was conducted with horizontal hanging method in greenhouse settled by shading materials. 55 components were identified by comparisons of retention indices and mass spectral data, including 22 hydrocarbons, 6 alcohols, 3 aldehydes, 9 ketones and 15 miscellaneous compounds. Neophytadiene was the major components of the oils and almost all hydrocarbons were gradually decreased during air-curing process. Most of alcohols were also diminished, on the contrary, 1-pentanol and benzyl alcohol among them were increased. Aldehydes and ketones were increased during air-curing and especially, the concentrations of solanone, $\beta$-damascone, $\beta$-damascenone and megastigmatrienones were much increased. Indole level of miscellaneous compounds were continuously increased during air-curing of Burley 21 tobacco.

• Journal of the Korean Society of Tobacco Science
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• v.24 no.2
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• pp.130-132
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• 2002

The new burley tobacco variety, KB 301, was developed by the cross combination ’(Ky 17 x TI 1068)F$_4$ x TC 613’. The modified pedigree breeding method was used in the selection procedures. The agronomic traits and chemical constituents of KB 301 were very similar to those of Burley 21. But KB 301 had significantly higher content of total DVT than Burley 21. KB 301 was also resistant to black shank, TMV and PVY.

• Journal of the Korean Society of Tobacco Science
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• v.4 no.2
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• pp.11-16
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• 1982

To investigate the effect of reciprocal grafting between Hyangchio (H) and L. A. Burley 21 (L.A), one a higher producer of nicotine and low yield, the other, a low producer of nicotine and high yield, growth of various parts of each variety and chemical constituents of these parts were evaluated. The results were as follows : The growth of H/H graft was depressed when compared to hyangchio and H/L. A. and L. A. Burley 21 showed most vigorous growth plants having L. A. Burley 21 top. The amount of total alkaloids were low in leaves and stems of plants having L. A. Burley 21 roots (L. A., L. A./L. A., H/L. A.). Plants having Hyangchio roots (H, L. A./H) were high in total alkaloids. The contents of reducing sugar were high in plant having Hyangchio top compared to L. A. Burley 21 tops, but there were not diffences in contents of ether extracts among all treatments.

• Journal of the Korean Society of Tobacco Science
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• v.15 no.2
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• pp.115-122
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• 1993

KB103 was developed from a cross between Burley 21 and Va 528 in 1983. It was developed by haploid method derived from anther culture method. It has moderate resistance to black shank(Phytophhorn nicotianae Breda de Haan Var. nictiana Waterhouse). KB103 produced good yields and quality in 1988-1990. It flowered about four or five days later than standard variety Burley 21, and plant height, leaf width, leaves per plants were similar to those of Burley 21. In maturing and curing properties as well as in chemical constituents of cured leaves, KB 103 was very similar to that of Burley 21. Regional farm test with the breeding line, KB 8304- ADH 65 named as KB 103 in 1986, was performed for 4 crop years from 1987 at 29 locations. It was released on burley tobacco area in 1992.

• Journal of the Korean Society of Tobacco Science
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• v.23 no.2
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• pp.95-102
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• 2001

This study was conducted to obtain the basic information for breeding of burley(N. tabacum cv. burley) and sun-cured tobacco(N. tabacum cv. sun-cured) variety. Two burley(Burley 21, KB 108), and T.I. 1068 and three sun-cured varieties(Yeonbyeon 3, Jaheungyeon and Jaraehong) were diallel crossed and 15 combinations of F$_1$generations were made in 1998, respectively. Six parental varieties, 15 F$_1$s were grown under the complete randomized block design with 3 replications at Chonju Experiment Station, Korea Ginseng & Tobacco Research Institute in 2000. The data of 12 quantitative characters were measured for degree of heterosis. The results obtained are as follows. Heterosis of F$_1$generation was positive in weight per leaf, plant height, stem diameter, yield, leaf length and total alkaloid content. Cross combinations between either Burley 21 or KB 108 and sun-cured varieties showed comparatively high heterosis in each characters.