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내도복 단교잡 사료용 옥수수 신품종 ‘청다옥’

A New Single Cross Maize Hybrid for Silage and Grain, ‘Cheongdaok’ with Lodging Tolerance

The Korean Journal of Breeding Science 2014;46(2):172-177.
Published online: May 31, 2014

1국립식량과학원,

1National Institute of Crop Science, RDA, Suwon 441-857, Korea

2국립축산과학원,

2National Livestock Research Institute, RDA, Suwon, 441-706, Korea

3경북농업기술원,

3Gyeongbuk Agricultural Research and Extension Services, Daegu 702-010, Korea

4강원도농업기술원

4Hongcheon Maize Experiment Station, Gangwon Agricultural Research and Extension Services, Hongcheon

*Corresponding author (E-mail: sonby@korea.kr, Tel: +82-31-290-6758, Fax: +82-31-290-6742)
• Received: June 3, 2014   • Revised: June 4, 2014   • Accepted: June 5, 2014

© The Korean Society of Breeding Science

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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  • Effects of Seeding Dates on the Growth Characteristics, Dry Matter Yield and Feed Value of Teosinte New Variety, “Geukdong 6”〔Zea mays L. subsp. mexicana (Schrad.) H. H. Iltis〕
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  • Growth Characteristics, Yield and Nutritive Values of New Teosinte, ‘Geukdong 6’
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  • Genetic Distance and Heterosis Degree Among the Developed Waxy Corn Lines
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A New Single Cross Maize Hybrid for Silage and Grain, ‘Cheongdaok’ with Lodging Tolerance
Korean. J. Breed. Sci.. 2014;46(2):172-177.   Published online June 30, 2014
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A New Single Cross Maize Hybrid for Silage and Grain, ‘Cheongdaok’ with Lodging Tolerance
Korean. J. Breed. Sci.. 2014;46(2):172-177.   Published online June 30, 2014
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A New Single Cross Maize Hybrid for Silage and Grain, ‘Cheongdaok’ with Lodging Tolerance
Image Image
Fig. 1. Breeding procedure of Cheongdaok.
Fig. 2. Picture of plant type and ear appearance of Cheongdaok.
A New Single Cross Maize Hybrid for Silage and Grain, ‘Cheongdaok’ with Lodging Tolerance

Color of silk, seed coat, and type of grain for Cheongdaok

Hybrid Color of silk Color of seed coat Type of grain

Cheongdaok Kwangpyeongok Light purple Yellow Dent
Light green Yellow Dent

Agronomic characteristics of Cheongdaok

Hybrid Days to silking Plant height Ear height Ratioz Lodging Ear Ratioy Stay-Greenx
(days) (cm) (%) (1~9) (%) (1~9)

Cheongdaok 81 272 48 1.8 45 3.8
Kwangpyeongok 82 282 52 1.9 45 3.3

Ratioz : Ear height ratio = ear height/plant height×100

Ear ratio(%)y = Ear DM/total DM × 100

Stay-greenx (1 : excellent, 9 : poor)

Resistance to disease of Cheongdaok

Hybrid Disease resistance
Corn borer (0~9)
B. maydis (0~9) E. turcicum (0~9) BSDVz Ear rot

Cheongdaok MR (5) R (3.7) MR MR MR (5.6)
Kwangpyeongok MR (5) R (2.7) MR MR MR (5.6)

BSDVz (black streaked dwarf virus)

R : Resistance, MR : Moderate Resistance

B. maydis, E. turcicum, and Corn borer (0 : resistance, 9 : sensitive)

Dry matter yield of Cheongdaok in preliminary and advanced yield trial from 2006 to 2007 in Suwon, NICS

Hybrid Dry matter yield (ton/ha)
Index (A/B)
2006 2007 Mean

Cheongdaok (A) 24.2 21.5 22.9 105
Kwangpyeongok (B) 22.2 21.3 21.8 100

Dry matter yield of Cheongdaok in regional yield trial from 2008 to 2010

Location Cheongdaok (ton/ha, A)
Kwangpyeongok (ton/ha, B)
2008 2009 2010 Mean Index (A/B) 2008 2009 2010 Mean Index

Suwon 20.3 26.3 21.4 22.7 100 22.5 23.3 22.5 22.7 100
Cheonan 13.9 26.6 20.1 20.2 102 14.3 24.7 20.7 19.9 100
Hongcheon 24.3 16.2 18.8 19.8 94 23.4 17.3 22.5 21.1 100
Daegu 17.8 16.6 20.6 18.3 97 18.5 17.5 21.1 19.0 100

Mean 19.0 21.4 20.3 20.2 98 19.7 20.7 21.7 20.7 100

TDN yield of Cheongdaok in regional yield trial from 2008 to 2010

Location Cheongdaok (ton/ha, A)
Kwangpyeongok (ton/ha, B)
2008 2009 2010 Mean Index (A/B) 2008 2009 2010 Mean Index

Suwon 14.1 17.6 15.0 15.6 99 15.5 15.9 15.7 15.7 100
Cheonan 9.6 17.5 14.1 13.8 101 10.0 16.3 14.4 13.6 100
Hongcheon 15.6 10.4 12.6 12.8 93 15.1 11.4 14.8 13.8 100
Daegu 11.8 12.3 15.0 13.1 95 13.0 12.9 15.1 13.7 100

Mean 12.8 14.4 14.2 13.8 97 13.4 14.1 15.0 14.2 100

Grain yield of Cheongdaok in regional yield trial from 2008 to 2010

Location Cheongdaok (ton/ha, A)
Jangdaok (ton/ha, B)
2008 2009 2010 Mean Index (A/B) 2008 2009 2010 Mean Index

Suwon 8.7 10.5 8.1 9.1 108 9.4 7.6 8.2 8.4 100
Hongcheon 9.5 6.8 9.5 8.6 102 9.6 6.7 9.0 8.4 100
Daegu 7.5 7.8 8.2 7.8 110 7.9 6.0 7.4 7.1 100

Mean 8.5 8.4 8.6 8.5 107 8.9 6.8 8.2 8.0 100

F1 Seed production trial of Cheongdaok in Yeongwol

Planting rate Inbred Silking date Pollen dispersal period Ear length Fertile kernels F1 seed yield
(cm) (%) (ton/ha)

4 : 1 KS159 (♀) July 23 - 16.6 90 1.8
KS155 (♂) - July 23~27 - - -

4 (♀) : 1 (♂)

Table 1 Color of silk, seed coat, and type of grain for Cheongdaok
Table 2 Agronomic characteristics of Cheongdaok

Ratioz : Ear height ratio = ear height/plant height×100

Ear ratio(%)y = Ear DM/total DM × 100

Stay-greenx (1 : excellent, 9 : poor)

Table 3 Resistance to disease of Cheongdaok

BSDVz (black streaked dwarf virus)

R : Resistance, MR : Moderate Resistance

B. maydis, E. turcicum, and Corn borer (0 : resistance, 9 : sensitive)

Table 4 Dry matter yield of Cheongdaok in preliminary and advanced yield trial from 2006 to 2007 in Suwon, NICS
Table 5 Dry matter yield of Cheongdaok in regional yield trial from 2008 to 2010
Table 6 TDN yield of Cheongdaok in regional yield trial from 2008 to 2010
Table 7 Grain yield of Cheongdaok in regional yield trial from 2008 to 2010
Table 8 F1 Seed production trial of Cheongdaok in Yeongwol

4 (♀) : 1 (♂)