• Proceedings of the Korean Society of Crop Science Conference
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• 1994.10a
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• pp.18-19
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• 1994

• Korean Journal of Breeding Science
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• v.42 no.3
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• pp.294-297
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• 2010

A new intermediate parent 'Wonye 30001' (Allium cepa L.) was developed by Bioenergy Crop Research Center, NICS in 2009. As a male sterile line, 'Wonye 30001' could be used for hybrid seed production by crossing with pollen parent. The first cross was conducted in 2000. Male sterile plants were selected from 'Ginque' breeding lines and fertile plants were selected from YG-1-1. The male sterile line 'Wonye 30001' has circular bulb and bulb weight of 260 g. As mid-late maturing type, lodging date is around May 20. Plant height and stem diameter are 57 cm and 15.9 mm, respectively. In seed harvesting characteristics, number of flower stalks and the length are 6 and 135cm, respectively. Flowering date of 'Wonye' is May 23 and is completely male sterile. 'Wonye 30001' is a promising male sterile line for hybrid bulb onion seed production.

• Proceedings of the Korean Society of Tobacco Science Conference
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• 1998.10a
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• pp.16-16
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• 1998

• KOREAN JOURNAL OF CROP SCIENCE
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• v.38 no.5
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• pp.413-417
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• 1993

This study was conducted to breed various cytoplasmic genetic male sterile (CGMS) and restorer lines with backgrounds of Korean japonica rice varieties. The CGMS line BT-CMS was crossed with the restorer line AR-3. The fertile $F_1 was emasculated and crossed with the Korean japonica rice varieties of the early maturing Sobaegbyeo, Odaebyeo, Gwanagbyeo and Daeseongbyeo, and of the medium maturing Hwajinbyeo, Paldal, Suwon 224 and Iri 386, and of the late maturing Nagdongbyeo, Palkweng, Hwacheongbyeo and Milyang 97. Each of the three way cross $F_{1S} was segregated into fertile and sterile individuals. The sterile individuals in each cross were discarded and the fertile individuals were emasculated and backcrossed with the Korean japonica rice varieties. The same process was applied from BC$_1$F$_1$ to BC$_4$F$_1$ generation. In the ${BC_4}{F_1}of each cross, the male sterile individual was crossed with the recurrent Korean japonica variety which was maintainer of male sterility. The male sterile lines of ${BC_6}{F_1}were named as Sobaegbyeo R, Odaebyeo R, Gwanagbyeo R, etc. The fertile individuals homozygous in pollen fertility were selected from the ${BC_4}{F_2}generation and named as Sobaegbyeo R, Odaebyeo R, Gwanagbyeo R, etc. Agronomic characteristics of the CGMS, restorer lines with backgrounds of Korean japonica, and the recurrent Korean japonica rice varieties grown in the field condition were compared. Culm length of the CGMS lines tended to be shorter than that of the recurrent parent, however no significant differences in heading date, panicle length and yield component were found among the CGMS, restorer and recurrent lines.

• Journal of The Korean Society of Grassland and Forage Science
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• v.4 no.3
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• pp.201-205
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• 1984

For the forage sorghum breeding, 22 American M.S. lines and 58 inbred lines were sown in pots, and 80 local varieties in field in 1978. Their agronomic characteristics were as follow; 1. All of the tested lines/varieties were headed from 22nd to 26th of July. Varieties of 69-86% were headed from 17th to 31st of July. All of lines/varieties began their flowering within 3-5 days after heading and native varieties had wide variance in heading and flowering. 2. The plant height of M.S. lines, inbred lines and local varieties were 86-114 cm, 81-190 cm and 142-289 cm, respectively. Leaf blade length of M.S. lines and inbred lines were ranged from 52.2 to 53.4 cm and local varieties 70.7 cm. Average stem diameter of M.S. lines and inbred lines were ranged from 8.81 to 7.74 mm and local varieties 11.3 mm. 3. Stem diameter were significantly correlated with leaf length and leaf blade width. The internode length were also significantly correlated with plant height. Especially, all characteristics in local varieties were correlated with each other.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.30 no.4
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• pp.427-430
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• 1985

Extrusion degree of stigma, numbers of opened florets at different time during anthesis, angle of opening florets and outcrossed seed set percent were investigated in four male sterile rices having background of Korean cultivars; Suwon 296A, Suwon 304A, Suwon 310A and Suwon 296GMS, and the Chinese cytoplasmic genetic male sterile rice Zhenshan 97A as control in order to get basic informations for hybrid rice breeding. The results obtained were summarized as follows; Extrusion degree of stigma in the four Korean male sterile lines tested was lower than in the Chinese one Zhenshan 97A. The better extrusion of stigma showed the higher outcross rate in male sterile rices. There were almost no relationships between peak of anthesis and outcrossed seed set in the male sterile rices tested. Large anthesis angle with long anthesis duration appeared to be essential for high outcrossed seed set of the male sterile rices. The genetic male sterile line showed the larger anthesis angle than the cytoplasmic and genetic male sterile one in the lines having the same background to the Korean rice cultivar Suwon 296.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.38 no.6
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• pp.495-508
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• 1993

This experiment was conducted to investigate the amount of natural crossing at varying isolation distance and various transplanting time in tobacco. Normal variety and male sterile line showed an average of 1. 6 and 29% natural crossing in the adjacent plantings, respectively. The natural crossing was highest in the adjacent planting, as expected, and less at the farther distance from pollinator plants. Plants transplanted in April 20th were higher in natural crossing than those of other transplanting time.

• Proceedings of the Korean Society of Tobacco Science Conference
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• 1998.05a
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• pp.26-26
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• 1998

• Proceedings of the Korean Society of Tobacco Science Conference
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• 1998.10a
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• pp.23-23
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• 1998

• Proceedings of the Korean Society of Crop Science Conference
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• 1988.02a
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• pp.16-17
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• 1988