• 한국작물학회지
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• 제44권4호
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• pp.309-315
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• 1999

Rice seedling test was conducted to check the loging tolerance at ripening stage through evaluating the root characters. Thirteen Korean and foreign rice cultivars with direct seeding adaptable or high quality characteristics were grown in a cell pot and under submerged paddy. The root characters and pushing resistance of rice hill were determined at seedling and ripening stage, respectively. The diameter of crown root at the 7th and 8th leaf stages was thicker in lodging tolerance cultivars than those of others and showed significant-positive correlation with both pushing resistance and crown root diameter of mature plants. Also, the tensile strength of crown root at the 7th and 8th leaf stage showed highly positive correlation with the tensile strength of crown root of mature plants. The number of crown root at 7th leaf stage was significant-positively correlated with that of mature plant. The diameter of seminal root was not significantly correlated with the diameter of crown root throughout the whole growth stage. These results indicate that the diameter, tensile strength and number of crown root associated with root lodging tolerance can be detected with the seedling at about 7th or 8th leaf stage, and the seedling test using the cell pot is an useful and practical method to select lodging tolerant cultivars or lines of rice based on root characters, especially diameter of crown root.

• 한국작물학회지
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• 제28권1호
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• pp.94-99
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• 1983

'81년 태풍 Agnes호에 의해 피해를 받았던 전북지방의 수도 품종들을 대상으로 도복의 원인을 벼의 절간을 대상으로 형태 및 생리적으로 조사분석 하였던 바 그 결과는 다음과 같다. 1. 도복 피해는 서광벼, 한강찰벼, 낙동벼가 심하였고 단간종인 밀양 30호는 경미하였다. 2. 절간장이 길고 단위절간중이 가볍고 간태와 간벽이 가늘수록 도복에 대한 저항성을 약화 시켰음을 명백히 알 수 있었다. 3. 도복된 포장의 벼는 정상답의 벼보다 촤절중이 갑벼고 절간장, 단위절간중과 촤절중과는 유의적인 상관관계가 있었다. 4. 절간에 전질소함량이 낮고 인산, 규산, Cellulose, 전분함량이 많을수록 도복에 대한 저항성을 높였다. 5. 도복에 저항력이 약한 품종은 간장과 단위절간중이 도복답과 정상답과의 차가 크고 저항력이 강한 품종은 그 차가 적었다.

• 한국작물학회지
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• 제28권1호
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• pp.100-106
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• 1983

이 연구에서는 벼 생육기 침수에서 피해가 가장 뚜렷이 나타나는 주요생육형질의 품종간 차이와 벼의 생식생장기 침수에서 피해를 크게 좌우하는 임실장해의 정도가 가장 예민하게 나타나는 시점을 찾기 위하여 벼의 포기단위, 이삭단위, 그리고 영화단위로 청수와 탁수로 처리하여 얻어진 결과를 요약하면 다음과 같다. 1. 침수일수의 증가에 따라 엽초의 이상신장량이 많아졌고, 침수후의 초장신장량 및 분벽수는 감소되었으며 출수지연일수가 길어졌다. 2. 일/인형 품종은 일본형 품종에 비하여 엽초의 이상신장량이 적고 침수후 초장 신장의 억제 및 분벽력의 감소가 적었다. 3. 침수에 의한 임실장해가 가장 심한 시기는 청수와 탁수 모두 출수기이었으며 특히 출수전의 수잉기말에서 출수후 개화하기 전이었다.

• 한국초지조사료학회지
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• 제20권1호
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• pp.1-6
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• 2000

Improvement of cold-tolerance of Italian ryegrass(Lo1ium multiflorum L.) is an important breeding objectivefor enlargement of cultivation area in Korea. To develop the cold-tolerant variety of Italian ryegrass,cold-tolerant clones survived under - 13- - 14$^{\circ}$C of minimum average air temperature in January wereselected in the area of Dun Nae, Kwangwon Province. The 5 lines of Italian ryegrass clones selected werepolycrossed for seed production. Synthetic seeds were examined on growth characters and forage productionsin Suwon from 1996 to 1998, in Unbong 1997 and in Younchun 1998, respectively. The growth charactersand forage productions of Italian ryegrass variety named as "Hwasan 101" were summarized as follow ;ltalian ryegrass variety, Hwasan 101 was tetraploid and showed semi-prostrate growth habit in autumn andwas not only dark green in leaf color and broad in flag leaf width but also excellent in leafiness. Also, itshowed low plant height at first heading date of 20th May and excellent lodging tolerance. Expecially,Hwasan 101 in all trial regions was 80 -90% of winter survivals that was higher than 60 -90% of Florida80 and Marshall varieties. Therefore we estimate that Hwasan 101 can be cultivated in regions that is higherthan -9$^{\circ}$C in minimum average air temperature and lower than 400m in sea level. In forage production ofHwasan 101, fresh weight and total digestible nutrient(TDN) yield were 66,940 and 6,551kghq and drymatter yield was 10,050kgha. In conclusion, Italian ryegrass, Hwasan 101 was medium and late maturingvariety but excellent in cold-tolerance, lodging-tolerance, leafiness, and forage production.(Key words : Italian ryegrass, Cold tolerance, New variety)ian ryegrass, Cold tolerance, New variety)

• 한국육종학회지
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• 제51권4호
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• pp.504-514
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• 2019

'예찬'은 농촌진흥청 국립식량과학원에서 재배안정성이 확대된 최고품질 중만생 벼 품종을 개발하고자 육성되었다. 단간 내도복이면서 밥맛이 좋은 최고품질 중만생 벼 '호품'을 모본으로 하고 복합내병성으로 내수발아성을 갖춘 최고품질 중생 벼 '해품'을 부본으로 단교잡 인공교배하여 육성되었다. 조기에 고정계통을 확보하고자 F₁ 식물체를 약배양하여 계통육성과정 중 최고품질 벼 선정 기준에 선발압을 두고 우량계통을 선발하여 생산력 검정시험과 지역적응성 검정시험을 거쳐 육성되었다. '예찬'은 보통기 보비재배에서 평균 출수기 8월 14일로 '남평'에 비해 1일 늦은 중만생종이다. '예찬'은 간장이 66 cm로 '남평'보다 9 cm 작은 단간 품종으로 도복에 안정적인 특성을 나타냈다. '예찬'은 도열병, 벼흰잎마름병 및 줄무늬잎마름병 등 벼의 삼대병에 모두 강한 복합내병성 품종이며, 특히 병원성이 강한 벼흰잎 마름병 K3a 균계까지 저항성을 갖추고 있어 최고품질 중만생벼 품종의 내병성 향상에 기여할 것으로 판단된다. 수량성은 보통기 보비재배에서 중만생 벼 표준품종인 '남평'과 비슷한 수준을 나타내 적정 수량성을 갖추고 있다. '예찬'은 쌀의 외관품위와 도정 특성이 좋고 밥맛이 우수하여 최고품질 품종에 선정되었다. '예찬'은 내도복성과 복합내병성을 갖춘 최고품질 벼 품종으로 남부평야지 재배에 적합하며 우리나라 밥쌀용 벼 품종의 품질 향상과 재배안정성 확대를 위한 육종사업에 활용되고 있다(품종보호권 등록번호: 제7647호; 2019. 4. 5.).

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.276-276
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• 2022

Wheat is one of the most widely grown food crops worldwide. Extreme precipitation and wind disturbances increased due to the abnormal climate, which resulted in increased lodging. Introduction of dwarf genes in wheat significantly increased lodging resistance and productivity in wheat breeding. In this study, we performed the genotyping of dwarfing genes between 'Keumkang' and 'Komac 5' ('Keumkang' mutant). In addition, we investigated the relationship between plant height and several phenotypic characters using F₂ segregation populations derived from crosses between the two varieties. There was no significant difference in phenotypic characters between the two varieties except for plant height. In the genotyping analysis using dwarfing genes, mutations of two dwarfing gene were found to be induced between the two varieties. The four genotypes of the F₂ populations from a crossing between 'Keumkang' and 'Komac 5' were used to compare and evaluate the effects of two dwarfing genes. Plants with two single mutant dwarfing gene and double mutant dwarfing gene revealed reduced plant heights than control plants by 4.5%, 6.9%, and 33.2%, respectively. The phenotype analysis showed that double mutant dwarfing gene affected wheat stem growth as the length decreases from the second node, resulting in decreased plant height. However, there were no significant differences in the agronomic traits between mutant plants and control plant. These results may provide novel information about the effect of double mutant dwarfing gene on plant height, and may help improve lodging tolerance and wheat yield.

• 한국육종학회지
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• 제49권3호
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• pp.250-255
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• 2017

일품벼의 주요 농업적 특성에 모로베레칸의 수당립수와 내도 복성을 조절하는 유전자가 이입된 근동질계통을 육성하기 위해 일품벼와 모로베레칸을 교배하고, 계속적인 여교배와 MAS를 병행 실시하여 유망한 계통 CR28-30-2 계통을 선발하였다. 생산력검정 시험 결과 조사된 형질 중 수당립수와 간기경 등을 제외한 기타 형질에서는 일품벼와 유사한 근동질계통으로, 품종보호출원 조건에 부합하여 화원7호로 명명하고 품종보호원을 출원하였다. 1. 화원7호는 출수기가 보통기재배에서 8월 15일로 일품벼보다 4일 정도 빠른 중만생종 품종이다. 2. 천립중은 23.8g으로 일품벼보다 무거웠으나 통계적인 유의한 차이는 없었다. 3. 흰잎마름병과 줄무늬잎마름병에는 이병성이다. 4. 완전미율은 일품벼에 비해 약간 낮았고, 아밀로스 함량은 일품벼보다 높았으나 통계적인 차이는 없었다. 5. 화원7호의 정조수량은 '10-'11년 2개년간 실시한 생산력검정 시험에서 평균 6.20 MT/ha 로 일품벼와 유사하였으나, 예산에서는 6.48 MT/ha로 일품벼 대비 104% 수준이었다. 6. 화원7호는 일품벼에 비해 수당립수가 많았다 그리고 간기경이 두꺼운 특성을 보였는데 이는 모로베레칸의 APO1 유전자의 영향으로 판단된다.

• 한국작물학회:학술대회논문집
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• 한국작물학회 1999년도 춘계 학술대회지
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• pp.7-8
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• 1999

• 한국초지조사료학회지
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• 제21권3호
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• pp.157-162
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• 2001

"Hwasan 102" is a new cold-tolerant Italian ryegrass(Lo1ium rnultiflorum L.) variety developed by theNational Livestock Research Institute(NLRI) in 1999. Having cold tolerance in Italian ryegrass is an importantfor enlargement of cultivation area and increase of productivity in Korea. To develop the cold-tolerant varietyof Italian ryegrass, cold-tolerant clones survived under - 13- - 14$^{\circ}$C of minimum average air temperature(MAAT) in January were selected at Dun Nae, Kwangwon Province in 1993. Five of selected clones werepolycrossed for seed production by NLRI, RDA, in 1995."Hwasan 102" was tetraploid variety, dark green in leaf color and broad in flag leaf width. Also it hassemi-prostrate and medium growth habit in late autumn and in early spring, respectively. "Hwasan 102" withlow plant height at harvesting time was excellent in lodging tolerance. First heading date of "Hwasan 102"was 19th May, it was similar to that of Marshall. Expecially, "Hwasan 102" survived about 60% under - 10- - 12$^{\circ}$C of MAAT in January, so it could be cold-tolerant variety that can be safely cultivated in regionshigher than -9'C of MAAT in January. Compared with Marshall, "Hwasan 102" showed 8% higher freshyield (59.2MT per ha) but it showed 2% lower dry matter yield (9.6MT per ha). Higher IVDMD and TDNand lower ADF and NDF were observed in "Hwasan 102" than those of Florida 80 and Marshall in Foragequality.(Key words : Italian ryegrass, Cold tolerance, New variety "Hwasan 102")rshall in Foragequality.(Key words : Italian ryegrass, Cold tolerance, New variety "Hwasan 102")san 102&")ot;)

• 한국초지조사료학회지
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• 제21권3호
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• pp.163-168
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• 2001

"Hwasan 103" is a new cold-tolerant Italian ryegrass(Lo1ium multiflorum L.) variety developed by theNational Livestock Research Institute(NLR1) in 1999. To develop a cold-tolerant variety of Italianryegrass(Lo1ium multiflorum L.), cold-tolerant clones survived under - 13 - - 14$^{\circ}$C of minimum average airtemperature(MAAT) in January were selected at Hwachun, Kwangwon Province in 1995. Five clones ofselected clones were polycrossed for seed production by NLRI, RDA in 1996."Hwasan 103" was diploid variety, green in leaf color and broad in flag leaf width. Also it hassemi-prostrate and medium growth habit in late autumn and in early spring, respectively. "Hwasan 103" wasexcellent in lodging tolerance at harvesting time. First heading date of "Hwasan 103" was 14th May, it wassimilar to that of Marshall. Expecially, "Hwasan 103" survived about 50-70% under - 10- - 12'C ofMAAT in January, so it could be cold-tolerant variety that can be safely cultivated in regions higher than -9$^{\circ}$C of MAAT in January. Compared with Marshall "Hwasan 103" showed 3% higher fresh yield (57.8MTper ha) and it showed 2% higher dry matter yield (11.OMT per ha). Higher IVDMD and TDN and lowerADF and NDF were observed in "Hwasan 103" than those of Florida 80 and Marshall in Forage quality.(Key words : Italian ryegrass, Cold tolerance, New variety "Hwasan 103")all in Forage quality.(Key words : Italian ryegrass, Cold tolerance, New variety "Hwasan 103")n 103&")ot;)