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초기생육 및 저온발아성이 우수한 중만생 고 바이오매스 사료용 벼 ‘녹우’

Mid-late Flowering, High Biomass Yielding Whole Crop Silage Rice Cultivar ‘Nokwoo’ Improved an Early Growth and Germination at Low Temperature

Korean Journal of Breeding Science 2017;49(3):265-272.
Published online: August 31, 2017

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

*Corresponding Author (okahn@korea.kr, +82-31-695-4027, +82-31-695-4029)
• Received: May 18, 2017   • Accepted: June 20, 2017

© Korean Society of Breeding Science. All rights reserved.

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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Mid-late Flowering, High Biomass Yielding Whole Crop Silage Rice Cultivar ‘Nokwoo’ Improved an Early Growth and Germination at Low Temperature
Korean. J. Breed. Sci.. 2017;49(3):265-272.   Published online September 1, 2017
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Mid-late Flowering, High Biomass Yielding Whole Crop Silage Rice Cultivar ‘Nokwoo’ Improved an Early Growth and Germination at Low Temperature
Korean. J. Breed. Sci.. 2017;49(3):265-272.   Published online September 1, 2017
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Mid-late Flowering, High Biomass Yielding Whole Crop Silage Rice Cultivar ‘Nokwoo’ Improved an Early Growth and Germination at Low Temperature
Image Image Image
Fig. 1 Pedigree diagram of ‘Nokwoo’.
Fig. 2 Genealogical diagram of ‘Nokwoo’.
Fig. 3 The appearance of whole crop silage rice variety, ‘Nokyang’(left) and ‘Nokwoo(Suweon560)’(right) improved an early growth and germination at low temperature in the paddy field
Mid-late Flowering, High Biomass Yielding Whole Crop Silage Rice Cultivar ‘Nokwoo’ Improved an Early Growth and Germination at Low Temperature

Heading date of whole crop silage rice cultivar, ‘Nokwoo’.

Plain Region Seeding date Transplanting date Heading date

Nokwoo Nokyang

Central Suwon Apr. 20 May 25 Aug. 22 Aug. 9
Honam Iksan Apr. 25 May 30 Aug. 21 Aug. 13
Naju Apr. 25 May 30 Aug. 20 Aug. 12
Yeongnam Milyang Apr. 25 May 30 Aug. 23 Aug. 14

Average - - Aug. 21 Aug. 12

Major agronomic traits and yield components.

Variety Culm length (cm) Panicle length (cm) No. of panicles /hill No. of grains /panicle Ripened grain ratio (%) 1,000 grain weight of brown rice (g)

Nokwoo 122 29 9 144 65.2 24.4
Nokyang 84 27 10 105 73.8 27.8

Major growth characteristics of the ‘Nokwoo’ in the early stages, which have, especially, good germination rate at low temperature and early elongation.

Variety Germinationz Rate (%) Seedlingy height (cm) Early Elongation Coldx tolerance Discolorationw

Nokwoo 80.3 21.8 good 8 4
Nokyang 43.7 20.7 normal 8 6

zGermination rate was investigated after incubating 13°C, 15days

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

xCold tolerance was investigated after treating 13°C, 10days

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

Response to physiological and environmental stress.

Variety Premature heading (%) Appearance of wilting Adult leaf sensecence Premature germination of paniclez (%) Cold tolerancey

Heading delay (days) Grain fertility (%) PAx

Nokwoo 0.0 Resistant Slow 25.1 13 12.2 7
Nokyang 6.6 Resistant Normal 23.2 13 13.7 8

zGermination rate at 7 days after incubation (25°C, 100% RH)

yCold tolerance was evaluated at a cold-water (17°C) irrigated nursery in Chuncheon

xPhenotypic acceptability: 1, strong, 3, medium strong, 5, medium, 7, medium weak, 9, weak

Agronomic traits related to lodging resistance of ‘Nokwoo’.

Variety Culm length (cm) Third Internode-length (cm) Breaking strength (g) Lodging Index Lodging in the field (0~9)

Nokwoo 110 17.5 2,609 182 3
Nokyang 86 15.1 1,768 167 1

Reaction to rice blast disease of ‘Nokwoo’ which has moderate resistance about leaf blast and resistance about neck blast.

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

No. of site tested (14) Ichon Jechon Milyang

Rz (0-3) M (4-6) S (7-9)

Nokwoo 3 8 3 5.3 0.0 0.0
Nokyang 2 8 4 57.2 54.7 1.5

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

yData was investigated in 14 leaf blast test site at local adaptability test region.

Reaction to bacterial disease, virus diseases and insect pests of ‘Nokwoo’ that has no resistance.

Variety Bacterial blight Virus diseases Resistance to insects

K1 K2 K3 K3a Stripe Dwarf Black-streak dwarf BPHy SBPH

Nokwoo S S S S S S S S S
Nokyang Rz R R S S S S S S

zR: resistant, S: susceptible

yBPH: brown planthopper, SBPH: small brown planthopper

Dry matter yields of whole crop silage rice cultivar, ‘Nokwoo’.

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

'12 '13 '14 Ave. '12 '13 '14 Ave. Index

Central 1,436 1,511 1,309 1,419 1,636 1,535 1,502 1,558 110
Honam 1,302 1,541 1,610 1,481 1,609 1,669 1,733 1,670 113
Yeongnam 1,278 1,379 1,561 1,406 1,546 2,054 1,458 1,686 120

Average 1,329 1,439 1,523 1,448 1,600 1,732 1,607 1,646 114

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

Variety Chemical properties (%)

CFz CPy ADFx NDFw TDNv

Nokwoo 3.2 5.3 25.5 41.6 68.8
Nokyang 2.5 6.7 22.6 38.8 71.1

zCF: crude fat,

yCP: crude protein,

xADF: acid detergent fiber,

wNDF: neutral detergent fiber,

vTDN: total digestible nutrients

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

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

Lz Wy Tx L/Ww L W T L/W

Nokwoo 7.78 3.16 2.03 2.47 5.39 2.69 1.71 2.01 3/1 26.3

Nokyang 8.02 3.05 2.10 2.64 5.70 2.76 1.94 2.06 1/2 21.4

zlength,

ywidth,

xthickness,

wlength/width ratio

Table 1 Heading date of whole crop silage rice cultivar, ‘Nokwoo’.
Table 2 Major agronomic traits and yield components.
Table 3 Major growth characteristics of the ‘Nokwoo’ in the early stages, which have, especially, good germination rate at low temperature and early elongation.

Germination rate was investigated after incubating 13°C, 15days

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

Cold tolerance was investigated after treating 13°C, 10days

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

Table 4 Response to physiological and environmental stress.

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

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

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

Table 5 Agronomic traits related to lodging resistance of ‘Nokwoo’.
Table 6 Reaction to rice blast disease of ‘Nokwoo’ which has moderate resistance about leaf blast and resistance about neck blast.

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

Data was investigated in 14 leaf blast test site at local adaptability test region.

Table 7 Reaction to bacterial disease, virus diseases and insect pests of ‘Nokwoo’ that has no resistance.

R: resistant, S: susceptible

BPH: brown planthopper, SBPH: small brown planthopper

Table 8 Dry matter yields of whole crop silage rice cultivar, ‘Nokwoo’.
Table 9 Nutritive value of ‘Nokwoo’ on 30 days after heading for silage use.

CF: crude fat,

CP: crude protein,

ADF: acid detergent fiber,

NDF: neutral detergent fiber,

TDN: total digestible nutrients

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

length,

width,

thickness,

length/width ratio