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New Cultivar Developed

만생 복합내병충성 고 바이오매스 사료용 벼 ‘청우’

안억근*, 강경호, 원용재, 정국현, 현웅조, 정응기, 박향미, 이점호, 장재기, 이정희, 정종민, 서정필

‘Cheongwoo’, Late Maturing, Multiple Disease and Insect Resistant, High Biomass Yielding Rice Cultivar for Whole Crop Silage Use

Korean Journal of Breeding Science 2020;52(2):190-199.
Published online: June 1, 2020

농촌진흥청 국립식량과학원

National Institute of Crop Science, RDA, Suwon 16429, Republic of Korea

* Corresponding Author (E-mail: okahn@korea.kr, Tel: +82-31-695-4027, Fax: +82-31-695-4029)
• Received: March 12, 2020   • Revised: March 26, 2020   • Accepted: April 20, 2020

Copyright © 2020 by 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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‘Cheongwoo’, Late Maturing, Multiple Disease and Insect Resistant, High Biomass Yielding Rice Cultivar for Whole Crop Silage Use
Korean. J. Breed. Sci.. 2020;52(2):190-199.   Published online June 1, 2020
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‘Cheongwoo’, Late Maturing, Multiple Disease and Insect Resistant, High Biomass Yielding Rice Cultivar for Whole Crop Silage Use
Korean. J. Breed. Sci.. 2020;52(2):190-199.   Published online June 1, 2020
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‘Cheongwoo’, Late Maturing, Multiple Disease and Insect Resistant, High Biomass Yielding Rice Cultivar for Whole Crop Silage Use
Image Image Image Image
Fig. 1 Pedigree diagram of ‘Cheongwoo’.
Fig. 2 Genealogy of ‘Cheongwoo’.
Fig. 3 The stature of whole crop silage rice variety, ‘Cheongwoo’ (Suweon585) improved a biomass yields, disease and insect resistance in the paddy field (upper) and its unhulled (a), brown (b) rice (bottom right)
Fig. 4 Reaction to rice blast disease (A), brown planthopper (B) and bacterial blight (C) of ‘Cheongwoo’ that has multiple resistance. Ny: Nokyang, Cw: Cheongwoo, Ad: Anda, Ip: Ilpum
‘Cheongwoo’, Late Maturing, Multiple Disease and Insect Resistant, High Biomass Yielding Rice Cultivar for Whole Crop Silage Use

Heading date of whole crop silage rice cultivar, ‘Cheongwoo’. ('14~'16, LATz)

Plain Region Seeding date Transplanting date Heading date

Cheongwoo Nokyang
Central Suwon Apr. 20 May 25 Aug. 29 Aug. 10
Honam Iksany Apr. 25 May 30 Aug. 29 Aug. 13
Naju Apr. 25 May 30 Aug. 29 Aug. 13
Yeongnam Milyang Apr. 25 May 30 Aug. 26 Aug. 14

Average - - Aug. 28** Aug. 13

Major agronomic traits and yield components of ‘Cheongwoo’. ('14~'16, Suwon)

Variety Culm Lengthz (cm) Panicle length (cm) No. of panicles/hill No. of spikelet/panicle Ratio of ripened grain (%) 1,000 grain weight of brown rice (g)
Cheongwoo 87±3* 29±1** 12±1ns 135±25ns 48.7±17.3ns 21.4±0.8**
Nokyang 83±2 26±1 11±1 106±15 69.4±67.3 26.7±1.6

Major growth characteristics of the ‘Cheongwoo’ in the early stages. ('14~'16, LATz)

Variety Germinationy Rate (%) Seedlingx height (cm) Early Elongation Coldw tolerance Discolorationv
Cheongwoo 96.3±2.1* 19.1±1.1** good 8 7
Nokyang 57.7±37.2 22.7±1.0 normal 7 5

Response to physiological and environmental stress. ('14~'16, LATz)

Variety Premature heading (%) Appe-arance of wilting Adult leaf sense-cence Premature germination of panicley (%) Cold tolerancex

Heading delay (days) Grain fertility (%) PAw
Cheongwoo 0.0 Strong Late 12.7 8 14.7 8
Nokyang 0.0 Strong Late 28.2 14 18.0 8

Agronomic traits related to lodging resistance of ‘Cheongwoo’. ('16, LATz)

Variety Culm length (cm) Third Internode-length (cm) Breaking strength (g) Lodging Index Lodging in the field (0~9)
Chongwoo 82 12.8 1,888±8.0** 97 1
Nokyang 81 11.9 1,777±7.6 118 1

Reaction to rice blast disease of ‘Cheongwoo’ which has strong resistance about leaf blast and resistance about neck blast. ('14~'16, LATz)

Variety Reaction to leaf blast at nursery testx (0-9) Reaction to neck blast (%)

No. of site tested (12) Ichon Iksan Milyang

Ry (0-3) M (4-6) S (7-9)
Cheongwoo 9 3 0 0.0 0.0 0.0
Nokyang 1 8 4 49.2 9.1 1.5

Reaction to bacterial blight, virus diseases and insect pests of ‘Cheongwoo’ that has multiple resistance. ('14~'16, LATz)

Variety Bacterial blight Virus diseases Resistance to insects



K1 K2 K3 K3a Stripe Dwarf BSDx BPH SBPH
Cheongwoo Ry R R R R S S R R
Nokyang R R R S R S S S S

Dry matter yields of whole crop silage rice cultivar, ‘Cheongwoo’. ('14~'16, LATz)

Region Nokyang (kg/10a) Cheongwoo (kg/10a)


14 15 16 Ave 14 15 16 Ave. Index
Central 1,309 1,317 1,494 1,373 1,994 1,886 2,157 2,019 147
Honam 1,610 1,509 1,348 1,489 2,121 2,306 2,116 2,181 147
Yeongnam 1,561 1,825 - 1,693 1,637 1,867 - 1,752 104
Average 1,523 1,540 1,397 1,495±1800 1,968 2,091 2,130 2,057±273** 138

Nutritive value of ‘Cheongwoo’ on 30 days after heading for silage use.

Variety Chemical properties (%)

CFz CPy ADFx NDFw TDNv
Cheongwoo 1.75 5.32 22.47 39.53 71.2
Nokyang 2.03 7.02 22.88 39.53 70.8

Grain shape, appearance and amylose content of ‘Cheongwoo’.

Variety Unhulled rice Brown rice White core/belly (0-9) Amylose content (%)


Lz Wy Tx L/Ww L W T L/W
Cheongwoo 8.02 3.21 2.14 2.51 5.45 2.67 1.97 2.05 3/1 22.7
Nokyang 8.26 3.20 2.26 2.58 5.69 2.80 2.08 2.03 1/2 19.6
Table 1 Heading date of whole crop silage rice cultivar, ‘Cheongwoo’. ('14~'16, LATz)

Asterisks indicate significant differences between ‘Nokyang’ and ‘Cheongwoo’ as evaluated by the t-test: **p<0.01

Local adaptability test

LAT was carried out at Iksan (2014~15) and Jeonju (2016) in Honam plain

Table 2 Major agronomic traits and yield components of ‘Cheongwoo’. ('14~'16, Suwon)

Asterisks indicate significant differences between ‘Nokyang’ and ‘Cheongwoo’ as evaluated by the t-test: **p<0.01, *p<0.05, nsNot significant

Length from soil surface to panicle neck

Table 3 Major growth characteristics of the ‘Cheongwoo’ in the early stages. ('14~'16, LATz)

Asterisks indicate significant differences between ‘Nokyang’ and ‘Cheongwoo’ as evaluated by the t-test: **p<0.01

Local adaptability test

Germination rate was investigated after incubating 13℃, 15 days

Seedling height was measured by 3 replicate on 30 days after seeding

Cold tolerance was evaluated at seedling stage after treating 13℃, 10 days

Grade standard for discoloration: normal (1), pale green of leaf tip (3), 1/3 yellow green of leaf (5), 2/3 yellowish brown of leaf (7), most of leaves withered (9)

Table 4 Response to physiological and environmental stress. ('14~'16, LATz)

Local adaptability test

Germination rate at 7 days after incubation (25℃, 100% RH)

Cold tolerance was evaluated at a cold-water (17℃) irrigated screening nursery in Chuncheon

Phenotypic acceptability: strong (1), medium strong (3), medium (5), medium weak (7), weak (9)

Table 5 Agronomic traits related to lodging resistance of ‘Cheongwoo’. ('16, LATz)

Asterisks indicate significant differences between ‘Nokyang’ and ‘Cheongwoo’ as evaluated by the t-test: **p<0.01

Local adaptability test

Table 6 Reaction to rice blast disease of ‘Cheongwoo’ which has strong resistance about leaf blast and resistance about neck blast. ('14~'16, LATz)

Local adaptability test

R: resistant (Degree, 0-3), M: moderate (Degree, 4-6), S: susceptible (Degree, 7-9)

Data was investigated in 12 leaf blast test site at local adaptability test region.

Table 7 Reaction to bacterial blight, virus diseases and insect pests of ‘Cheongwoo’ that has multiple resistance. ('14~'16, LATz)

Local adaptability test

R: resistant, S: susceptible

BSD: black-streak dwarf, BPH: brown planthopper, SBPH: small brown planthopper

Table 8 Dry matter yields of whole crop silage rice cultivar, ‘Cheongwoo’. ('14~'16, LATz)

Asterisks indicate significant differences between ‘Nokyang’ and ‘Cheongwoo’ as evaluated by the t-test: **p<0.01

Local adaptability test

Table 9 Nutritive value of ‘Cheongwoo’ on 30 days after heading for silage use.

CF: crude fat, yCP: crude protein, xADF: acid detergent fiber, wNDF: neutral detergent fiber, vTDN: total digestible nutrients

Table 10 Grain shape, appearance and amylose content of ‘Cheongwoo’.

length, ywidth, xthickness, wlength/width ratio