• KOREAN JOURNAL OF CROP SCIENCE
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• v.60 no.4
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• pp.401-411
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• 2015

Drought stress has detrimental effects on the seedling development, vegetative/ reproductive growth, photosynthesis, root proliferation, anthesis, anthesis-silking interval (ASI), pollination and grain yield in maize. Typically, two weeks before silking through pollination are an important time in maize life. Here we reviewed the effects of drought stress on growth, physiological/ molecular researches for drought tolerance, and breeding to genomics in maize. Drought stress during kernel development increases leaf dying and lodging, decreases grain filling period and grain yield. Physiological factors of drought stress/ effects are water content, water deficits, and water potential. Nowdays molecular marker assisted breeding method is becoming increasingly useful in the improvement of new germplasm with drought stress tolerance.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.28 no.2
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• pp.240-247
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• 1983

Heritability of flowering date, length of main stem, weight of 100 grains and number of shells per square meter in peanut were high with low local variation. There was positive genotypic correlation between length of main stem and yield, No. of shells per square meter and matured seed ratio, No of shells per square meter and yield 100 grain weight and yield but was negative genotypic correlation between flowering date and yield. With the view of path-coefficients, length of main stem, number of shells per square meter showed highly direct effects at.. all locations.

• Journal of Animal Science and Technology
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• v.50 no.4
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• pp.457-464
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• 2008

Heritability and genetic correlation for reproductive traits in Yorkshire pig breed were estimated using Bayesian method via Gibbs sampling. The data set consisted of 9,609 reproductive records at pig breeding farm in Korea. For estimating those parameters using Gibbs sampling, 5,000 cycles of ‘burn-in’ period were discarded among a total of 55,000 samples. Out of the remaining 50,000 samples, 5,000 estimates by each parameter were retained and used for analyses to avoid any correlation among adjacent samples. The reproductive trait considered in this study were total number of born piglets(TNB) and estimated by two different models. The estimated heritability and permanent environmental effect using Gibbs sampler were 0.12±0.020 and 10.9±1.63, respectively. Estimated genetic correlations considered parities as different traits were distributed from 0.99 to －0.13. Such results indicated that reproductive traits for sows should be considered as different traits.

• Journal of Korean Society of Forest Science
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• v.43 no.1
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• pp.74-86
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• 1979

동위효소(同位酵素)가 임목분야(林木分野)의 연구(硏究)에 이용(利用)되기 시작(始作)한지 10여년이 지난 요즈음 많은 분야(分野)에서 그 성과(成果)가 높이 평가(評價)되고 있다. 특(特)히 복잡(複雜)한 유전변이(遺傳變異)를 가지고 있는 천연임분(天然林分)에서의 유전분석(遺傳分析)으로 많은 것을 밝혀 내어 임목(林木)의 유전육종학적(遺傳育種學的) 측면(側面)뿐만 아니라 삼림유전생태학적(森林遺傳生態學的)인 면(面)에서도 큰 도움을 주고 있다. 본(本) 총설(總說)은 지금까지 임목(林木)에 대(對)한 동위효소(同位酵素) 이용(利用) 실례(實例)를 중심(中心)으로 앞으로 응용(應用) 가능분야(可能分野)에 대(對)해 검토(檢討)한 것이다.

• Proceedings of the Korean Aquaculture Society Conference
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• 2006.05a
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• pp.425-426
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• 2006

• Proceedings of the Korean Society of Crop Science Conference
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• 2017.10a
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• pp.246-246
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• 2017

• KOREAN POULTRY JOURNAL
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• v.39 no.3 s.449
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• pp.96-99
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• 2007

육종이 발전하면서 양계산업에 종사하는 우리는 닭의 생리 및 유전학에 대하여 알지 못하고는 국제 경쟁력에서 이길 수가 없다고 생각한다. 우리가 종계의 생리학적 이해와 사양관리 기술을 발전시켜 국제 경쟁력 있는 산업으로 발전하기 위해서는 우리나라 환경에 적합한 종계 사양관리기법을 만들어서 농장에 보급해야 하는 과제가 우리에게 남아 있다. 필자는 이번호에 수탉의 정소발육과 수정율에 대하여 논하고 종계 생산성 향상에 조금이라도 도움이 되었으면 한다

• Horticultural Science & Technology
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• v.33 no.5
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• pp.806-806
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• 2015

• Journal of Radiation Industry
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• v.5 no.4
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• pp.347-352
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• 2011

In order to identify the genetic relationship analysis by acute and chronic gamma irradiation, Arabidopsis (Arabidopsis thaliana L.) were irradiated with 200 Gy of gamma-rays using gamma-irradiator (3,000 Ci; Nordion, Canada) and gamma-phytotron (400 Ci; Nordion, Canada) for acute and chronic irradiation, respectively. Genetic relationship among two acute gamma-irradiated plants (A1 and A24) and three chronic gamma-irradiated plants (C1W, C2W, C3W) were analyzed using the amplified fragment length polymorphism (AFLP) technique compared with each non-irradiated plant. A total of 28 EcoRI and MseI primer combinations were used to screen 8 treatments by the ABI3130 capillary electrophoresis system. Amplified products by 28 primer sets showed 1,679 bands with an average of 51 bands per primer combination. Out of the total bands scored, 1,164 fragments were polymorphic bands, with different alleles existing among the treatments. The cluster analysis was performed using the UPGMA (Unweighted Pair Group Method using Arithmetic) in the computer program NTSYS-pc. In clustery analysis, acute gamma-irradiation showed higher genetic variation compared with chronic gamma-irradiation.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.21 no.1
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• pp.92-96
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• 1976

Considerably large phenotypic and genotypic variations for the important agronomic traits were found in a soybean population consisted with 825 local lines collected in Korea. Genetic coefficient of variation, heritability, and genetic gain for seed weight, plant height. and number of pods per plant were relatively high. Maturity showed a high heritability value with a low genetic gain and the result may be due to the narrow range of maturity date of the population studied.