• 한국작물학회:학술대회논문집
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• 한국작물학회 2018년도 추계학술대회
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• pp.9-12
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• 2018

China is an agricultural country. Rice, maize and soybean are major crops for national economy and people's livelihood. These three crops are also the pillar industry in northeast China, especially in Heilongjiang province.

• International Journal of Industrial Entomology and Biomaterials
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• 제31권2호
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• pp.115-126
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• 2015

The tropical climate prevailing in India adversely affects temperate bivoltine silkworm rearing and causes crop loss especially during summer. Identification of high temperature tolerant bivoltine breeds by screening for thermotolerance in the silkworm, Bombyx mori (Lepidoptera: Bombycidae) is an essential prerequisite for the development of thermotolerant bivoltine breeds / hybrids. Therefore, in this study, 20 silkworm breeds were reared at different temperatures (25 ± 1℃,32 ± 1℃, 34 ± 1℃ and 36 ± 1℃) for 6 h every day from 3^rd d of 5^th instar to till spinning. Significant differences (p < 0.01) were found among all the rearing traits over temperature. Based on pupation percentage, SK4C and BHR3 were identified as thermotolerant bivoltine breeds. Hierarchical clustering analysis based on rearing traits at tested temperatures grouped 20 silkworm breeds in four clusters which included one cluster each of susceptible and tolerant, and two clusters of moderately tolerant silkworm breeds. This suggests that clustering based on rearing data at high temperatures by using Euclidean distance can be an effective approach in classifying the silkworm breeds on their thermotolerance capacity. The identified breeds would be used for development of thermo tolerant bivoltine silkworm breeds / hybrids.

• Applied Biological Chemistry
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• 제41권2호
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• pp.137-140
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• 1998

딱정 벌레목 유충에 살충성을 나타내는 형질 전환 토마토 식물체를 4세대까지 분자 육종을 하였다. 분자 육종된 4세대 식물체에서 살충성 유전자인 B.t.t. 독소 유전자와 유전자가 발현되는 것을 확인하였다. 이 4세대 형질 전환 식물체는 독소 유전자 발현에 의해 딱정 벌레 유충에 살충성을 나타내고 있음이 확인 되었고, 4세대 형질 전환 식물체는 염색체는 2 배수체로 확인되어 정상적인 토마토 식물체임이 증명 되었다. 이 결과들은 형질 전환에 사용된 독소 유전자가 다음 세대로 안정되게 유전되고 있음을 나타내고 있다는 증거이다. 이러한 형질 전환된 식물체의 분자 육종은 농업에 있어서 현재의 일시적인 해충 방제에 비해 장기적인 해충 구제에 대한 새로운 방법의 가능성을 제시하고 있다고 하겠다.

• The Plant Pathology Journal
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• 제21권4호
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• pp.343-348
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• 2005

The partial nucleotide sequences of the genomic dsRNA mycoviruses infecting Pleurotus ostreatus (isolates ASI2596, ASI2597, and Bupyungbokhoe) and Agaricus blazei Murrill were determined and compared with those of the other dsRNA mycoviruses. Partial nucleotide sequences of the purified dsRNA from ASI2596 and ASI2597 revealed RNA-dependent RNA polymerase sequences that are closely related to Oyster mushroom isometric virus 2, while nucleotide sequences and the deduced amino acid sequence from dsRNA mycovirus infecting Agaricus blazei did not show any significant homology to the other dsRNA mycoviruses. Specific primers were designed for RT-PCR detection of these dsRNA viruses and were found to specifically detect each dsRNA virus. Northern blot analysis confirmed the homogeneity of RT-PCR products to each purified dsRNA. Altogether, our results suggest that these virus-specific primer sets can be employed for the specific detection of each dsRNA mycovirus in infected mushrooms.

• 한국식물생명공학회:학술대회논문집
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• 한국식물생명공학회 2005년도 추계학술대회 및 한일 식물생명공학 심포지엄
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• pp.404-404
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• 2005

• The Plant Pathology Journal
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• 제27권4호
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• pp.360-366
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• 2011

Bacterial leaf spot of Euphorbia pulcherrima has been reported in many countries. Characterization by polyphasic approaches indicated that the isolates from India, USA and New Zealand could be distinguished based on rep-PCR profiles and gyrB phylogenies, while the Chinese isolates should be ascribed to Xanthomonas axonopodis pv. poinsettiicola.

• Journal of Plant Biotechnology
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• 제45권3호
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• pp.236-241
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• 2018

Lilium is a perennial bulbous plant belonging to the liriotypes genus. Our aim was to study the phylogenetic relationships of the Lilium family. Two varieties of Lilium ledebourii, 44 varieties of the gene bank, and one variety from the Tulipa family served as the out group. In order to study the diversity between lilium masses, ITS regions were used to design the marker. The results showed that the guanine base is the most abundant nucleotide. Relatively high conservation was observed in the ITS regions of the populations (0.653). Phylogenetic analysis showed that sargentiae and hybrid varieties are older than other varieties of the Lilium family. Also, the location of L. ledebourii varieties (Damash and Namin) was identified in a phylogenetic tree by using the ITS marker. Overall, our research showed that ITS molecular markers are very suitable for phylogenetic studies in the Lilium family.

• 원예과학기술지
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• 제35권2호
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• pp.149-164
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• 2017

Next generation sequencing (NGS) technologies have led to the rapid accumulation of genome sequences through whole-genome sequencing and re-sequencing of crop species. Genomic resources provide the opportunity for a new revolution in plant breeding by facilitating the dissection of complex traits. Among vegetable crops, reference genomes have been sequenced and assembled for several species in the Solanaceae and Cucurbitaceae families, including tomato, pepper, cucumber, watermelon, and melon. These reference genomes have been leveraged for re-sequencing of diverse germplasm collections to explore genome-wide sequence variations, especially single nucleotide polymorphisms (SNPs). The use of genome-wide SNPs and high-throughput genotyping methods has led to the development of new strategies for dissecting complex quantitative traits, such as genome-wide association study (GWAS). In addition, the use of multi-parent populations, including nested association mapping (NAM) and multiparent advanced generation intercross (MAGIC) populations, has helped increase the accuracy of quantitative trait loci (QTL) detection. Consequently, a number of QTL have been discovered for agronomically important traits, such as disease resistance and fruit traits, with high mapping resolution. The molecular markers for these QTL represent a useful resource for enhancing selection efficiency via marker-assisted selection (MAS) in vegetable breeding programs. In this review, we discuss current genomic resources and marker-trait association analysis to facilitate genome-assisted breeding in vegetable species in the Solanaceae and Cucurbitaceae families.

• Journal of Animal Science and Technology
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• 제64권2호
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• pp.235-246
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• 2022

In this study, we used more reliable experimental materials and methods to detect the effects of osteopontin (OPN) on boar sperm in vitro capacitation, acrosome reaction, and fertilization efficiency. We reorganized and obtained the OPN protein of the porcine source. Immunofluorescence and Western blot show the localization and expression of the OPN protein before and after sperm capacitation. To determine whether OPN can affect sperm during sperm capacitation, we examined cyclic adenosine monophosphate (cAMP) concentrations after sperm capacitation, and the results showed that OPN significantly increased the cAMP concentration in sperm (p < 0.05). Flow cytometry showed that 0.1 ㎍/mL OPN-treated sperm had better acrosome reaction ability. In vitro fertilization (IVF) showed that 0.1 ㎍/mL OPN significantly increased the rate of embryo division. In conclusion, this study found that 0.1 ㎍/mL porcine OPN protein can significantly improve porcine capacitated sperm motility, cAMP concentration after capacitation sperm, acrosome reaction ability, and embryo division during IVF and provides new clues to explore the mechanism of OPN's function on sperm.

• 원예과학기술지
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• 제33권6호
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• pp.947-954
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• 2015

질전환에 적합한 국화 스프레이 타입 품종을 선발하기 위해서 국내 연구기관에서 육성된 39개 품종 및 일본품종인 스탠다드 타입 신마를 모아 재분화율과 아그로박테리움 감염도를 조사하였다. 잎과 마디 절편체로부터의 신초 재분화를 위하여 IAA $0.5mg{\cdot}L^{-1}$와 BAP $1.0mg{\cdot}L^{-1}$가 첨가된 MS 배지를 사용하였다. 잎 절편체로부터의 신초 재분화는 BRM 품종이 가장 높았고 VS, WW, YTM 품종순으로 분화되었다. 이전에 형질전환재료로 보고된 바 있는 신마는 PK, SPP 품종과 유사한 수준을 보였다. 마디 절편체로부터의 신초 재분화는 PA 품종에서 가장 높았으며 WW 품종이 다음으로 확인되었다. 40개의 국화 품종을 대상으로 아그로박테리움에 대한 감염도를 조사한 결과, 잎 절편체에서는 WPP, YNW, VS, PP, WW, FA, PA, YMN 품종이 가장 높았고 마디 절편체에서는 WPP, PA, PK, YNW 품종이 가장 높았다. 이상의 결과를 종합해 볼 때 국화의 잎 절편체를 이용한 형질전환은 VS와 WW 품종이 가장 적합한 반면에 마디형질전환에는 PA 품종이 가장 적합한 것으로 확인되었다.