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Genetic Diversity and Relationship Analysis of Genus Taraxacum Accessions Collected in Korea
Ryu, Jai-Hyunk,Bae, Chang-Hyu The Plant Resources Society of Korea 2012 한국자원식물학회지 Vol.25 No.3
Genus Taraxacum has been widely used as a folkloric medicine for treatment of diverse diseases. The genetic diversity and relationship among 32 accessions belonging to five Taraxacum species (T. mongolicum T. coreanum, T. coreanum var. flavescens, T. officinale and T. laevigatum) which collected from field, mountain, island and seaside of Korea were evaluated using ISSR markers. A total of 142 ISSR loci detected in the overall species were all polymorphic loci (100%) and interspecies polymorphisms obtained from Korean native and naturalized species were 98.2% and 94.5%, respectively. The genetic similarity matrix (GSM) among 32 accessions ranged from 0.025 to 0.860 with an average of 0.303. According to the clustering analysis, the Korean native species and naturalized species were divided two major clusters. In addition, the different species were divided into independent groups except for the T. coreanum and T. coreanum var. flavescens, and all the 32 accessions could be classified into 7 categories. The study findings indicate that Taraxacum accessions have a high genetic diversity and the dandelion accessions as breeding materials can be effectively utilized for the improvement of Taraxacum breeding.
Ryu, Jai Hyunk,Seo, Kyoung Sun,Choi, Gab Lim,Rha, Eui Shik,Lee, Sheong Chun,Choi, Seong Kyu,Kang, Si-Yong,Bae, Chang-Hyu The Plant Resources Society of Korea 2012 한국자원식물학회지 Vol.25 No.6
Dandelion has been widely utilized for medicinal and edible purposes. This research was conducted to evaluate the effect of supplemental LED (light-emitting diode) light on germination, growth characteristics and anthocyanin content of dandelion (Taraxacum officinale) seedling using LED blue (460 nm), red (660 nm, R), blue + red (B:R=6:4) and fluorescent lamp light treatment. By LED illumination to T. officinale seed germination speed was delayed, and germination rate was the highest in the fluorescent light. The growth characteristics (plant height, number of leaves, root length and fresh weight) were greatly influenced by supplemental LED light compared with control treatment, and the growth promotion was the most effective in the red LED illumination. After 60 days of red and mixed LED light treatments, anthocyanin content of dandelion plants was significantly changed. The anthocyanin content was increased by 12~19 mg/100 g under the red LED and the mixed light conditions compared with the control and the blue LED. Results indicate that illumination with red and mix LEDs, compared with other light treatments, is beneficial for promotion of growth and anthocyanin content in dandelion.
Genetic Variability in Proton Beam Induced Mutants of Dandelion (Taraxacum officinale)
Jai Hyunk Ryu,Hyun Su So,Chang-Hyu Bae 한국육종학회 2012 한국육종학회 심포지엄 Vol.2012 No.07
Ionizing radiations have been effective mutagen to overcome the limitation of the useful genetic resources in natural environment. This study was conducted to investigate an effect of proton beam on germination, growth patterns in the irradiated dandelion (Taraxacum officinale), and genetic variation in 12 morphological mutants induced in proton-beam irradiated dandelion. Percentage germination rate was drastically decreased over 250Gy. The lethal dose 50 (LD50) of germination was estimated between 250 Gy to 500 Gy. Significant decreases in growth patterns (plant height, number of leaf and fresh weight) were observed by increase of dose (Gy) of proton beam irradiation. According to the correlation analysis between dosage and growth factors, the orders of compactness of correlation were germination, plant height, fresh weight and number of leaf, respectively. Twelve morphological variants such as, dwarf, color, plastid, growth and leaf shape were screened at 50 to 250 Gy of the beam irradiation. As a result of ISSR analysis of the 12 variants, out of 33 bands detected overall, 8 bands were identified to be polymorphic with a rate of 24.2% at the control group. While 33 bands detected overall, 21 bands were identified to be polymorphic with a rate of 63.6% at the proton beam irradiation. The result indicates that the dandelion with proton beam treatment might be promoted variation at DNA level
( Jai Hyunk Ryu ),( Bo Keun Ha ),( Dong Sub Kim ),( Jin Baek Kim ),( Sang Hoon Kim ),( Joon Woo Ahn ),( Il Yun Jeong ),( Han Jik Jo ),( Ee Yup Kim ),( Si Yong Kang ) 한국육종학회 2014 Plant Breeding and Biotechnology Vol.2 No.4
This study was carried out to evaluate the genetic diversity and relationships among fifty-six blackberry (Rubus fructicosus) mutants derived from gamma-ray treatment (fifty-two lines) by analysis of Amplified fragment length polymorphism (AFLP) markers. Both cluster analysis and principal coordinate analysis (PCOORDA) were conducted in order to study the genetic diversity, using both morphological traits and AFLP makers. A total of 589 bands were amplified with an average of 58.9 bands per primer. Among them, 560 were identified to be polymorphic, with a rate of 95.08%. A showed a highly significant (P≤0.01) positive correlation with GD and PIC (r2=0.999). MI also showed a significant (P≤0.05) positive correlation with GD and PIC. According to the clustering analysis, all mutant lines could be classified into five categories, but the three gamma-ray treatment lines and the cross-bred line were not clustered into any groups. For the morphological traits, cluster analysis divided the blackberry germplasm into six clusters and two independent groups. In addition, the morphological dendrogram indicated an unclear pattern of division among the groups based on AFLP analysis. The findings of this study indicate that mutant lines have high genetic diversity, and can be effectively utilized as materials for the improvement of breeding.
Jai Hyunk Ryu,Kyoungsun Seo,Hyun Su So,Sheong Chun Lee,Chang-Hyu Bae 한국육종학회 2012 한국육종학회 심포지엄 Vol.2012 No.07
Dandelion has been widely used as a folkloric medicine for treatment of diverse diseases. This study was conducted to evaluate the effect of light spectrum using red (660 nm), blue (460 nm), red and blue mixed (Red : Blue = 6 : 4) LED (light emitting diodes) and fluorescent lamp on growth and functional components of dandelion (Taraxacum officinale). When LED was illuminated to T. officinale cv. Goldenboll, seed germination was delayed, and germination rate was the highest in the control (fluorescent light). The growth (plant height, root length and fresh weight) except leaf number was increased under the LED treatments compared with the control, and the growth promotion was the most effective in the red LED illumination. Total polyphenol contents in dandelion irradiated with the red and blue mixed or the red LED were 121.77 mg% or 115.36 mg%, respectively, which were greater than those in dandelion treated with blue LED and fluorescent lamp. Asparagine, proline, serine, threonine, glutamic acid and arginine were the predominant amino acids in dandelion and total amino acid was the highest under the Red LED illumination. The results indicate that application of the red and the mixed LED illumination promote growth and increase functional components during cultivation of dandelion
최기춘(Ki Choon Choi),류재혁(Jai Hyunk Ryu),정민웅(Min-Woong Jung),박형수(Hyung Su Park),김천만(Cheon Man Kim),임영철(Young Chul Lim),김다혜(Da Hye Kim),최기준(Gi Jun Choi),김원호(Won Ho Kim) 한국초지조사료학회 2012 한국초지조사료학회지 Vol.32 No.2
We examined the contents of amino acids to provide the basic data for the utilization of white panicled rice (Oryza sativa L., WPR) cultured in reclaimed paddy field of Bigumdo of Korea in 2011. WPR used in this study were collected in 1000 ha of reclaimed paddy field of Bigumdo. Crude protein contents of whole rice have the highest in leaf blade, followed by whole grain, leaf sheath and stem. The contents of total amino acids showed the highest trend in region received the most severe damage, but the lowest trend in region of normal growth. The content of glutamic acid was the highest among amino acids in leaf blade, whole grain, leaf sheath and stem collected in all regions, but the content of methionine was the lowest. Therefore, the contents of amino acids showed a similar level between the region occurred WPR and the region of normal growth. Further research on the nutritional aspects of forage must be performed because nutritive values of WPR were influenced by the degree of damage of WPR. 본 연구에서는 간척 논에서 재배된 벼의 백수를 조사료 자원으로 활용하기 위한 기초자료를 제공하기 위해 백수 벼의 아미노산 조성을 조사하였다. 본 연구에 분석된 벼 시료는 전남 신안군 비금도 벼 백수 피해가 일어난 약 1,000 ha의 벼에서 채취하였다. 총체 벼의 조단백질 함량은 엽 > 알곡 > 잎집 > 줄기 순으로 나타났으며, 백수정도에 따른 총 아미노산 함량은 가장 심한지역>중간지역>정상생육 지역 순으로 나타났다. 그리고 심한지역, 중간지역 및 정상생육지역 모두 엽, 알곡, 잎집 및 줄기 내 아미노산은 glutamic acid가 가장 높은 함량을 보였으며 methionine이 가장 낮은 함량을 보였다. 따라서 벼 백수 피해가 일어난 지역의 벼와 정상생육이 진행된 벼의 아미노산 함량은 비슷한 수준을 보였지만 벼 백수피해 정도에 따라 조사료원으로써 영양적인 가치가 차이가 있을 것으로 보여지기 때문에 조사료의 영양적 측면에 관한 연구가 추가적으로 진행되어야 한다.
최기춘(Ki Choon Choi),류재혁(Jai Hyunk Ryu),정민웅(Min-Woong Jung),박형수(Hyung Su Park),김원호(Won Ho Kim),김다혜(Da Hye Kim),김천만(Cheon Man Kim),김종근(Jong Geun Kim),김맹중(Mang Jung Kim),임영철(Young Chul Lim) 한국초지조사료학회 2012 한국초지조사료학회지 Vol.32 No.4
This study was carried out to investigate the effect of harvest stage of rape on nutritive values and quality of round baled rape silage in field of forage crops of Department of Animal Resources Development, National Institute of Animal Science, RDA. Rape was harvested at three different growth stages (flowering, milk and dough stage) and ensiled at each harvest stages. The content of moisture of rape increased with delayed harvest maturity. However, the content of moisture of rape was controlled by pre-wilting (24 hr. and 48 hr). The content of moisture in dough stage was similar to that of haylage. The content of crude protein in round baled rape silage increased with delayed harvest maturity, but the contents of acid detergent fiber, neutral detergent fiber and total digestible nutrient decreased. The pH in all rape silage ranged from 3.8 to 4.4 at three different harvest stages, and pH in dough stage was higher than that of flowering and milk stages (p<0.05). The content of lactic acid of all rape silage increased with delayed harvest maturity (p<0.05), but the content of acetic acid decreased (p<0.05). And then, flieg’s score revealed that there was an increase in order; flowering stage (100) = milk stage (100) > ripen stage (88).
김원호(Won Ho Kim),류재혁(Jai Hyunk Ryu),김다혜(Da Hye Kim),박형수(Hyung Su Park),정민웅(Min-Woong Jung),서성(Sung Seo),최기준(Gi Jun Choi),최기춘(Ki Choon Choi) 한국초지조사료학회 2012 한국초지조사료학회지 Vol.32 No.2
This study was performed to investigate the nutritive values of white panicled rice (Oryza sativa L., WPR) silage manufactured with WPR grown in reclaimed paddy field of Bigumdo of Korea in 2011. The WPR used in this study were collected in 1,000 ha of reclaimed paddy field of Bigumdo and was harvested at dough stage and ensiled. The yield of whole crop rice (WCR) grown in region received the most severe damage (MSD) was lower as about 800 ㎏/ha as than that in region of normal growth (NG). The content of crude protein and total digestible nutrient in WCR of MSD slightly increased, as compared to that in WCR of NG, but the contents of acid detergent fiber and neutral detergent fiber significantly decreased (p<0.05). The pH in WCR silage of MSD and NG ranged from 4.5 to 5.0 and pH decreased by the inoculation of lactic bacteria (p<0.05). The content of lactic acid in WCR silage of MSD and NG increased by the inoculation of lactic bacteria (p<0.05), but the content of acetic acid and butyric acid decreased (p<0.05). Flieg's score in WCR silage of MSD and NG inoculated lactic bacteria increased from 2 to 3 grade, as comparing to non-inoculation of lactic bacteria. Therefore, this study suggests that WPR can be utilized as forage. 본 연구는 전남 신안군 비금도 간척 논에서 백수현상이 나타난 벼를 조사료 자원으로 활용하기 위해 백수 벼 사일리지의 사료가치 및 유기산 등 품질을 조사하기 위해서 수행하였다. 벼 백수현상이 가장 심한지역의 총체 벼의 수량은 정상지역보다 약 800 ㎏/ha 정도 감소되었다. 그리고 벼 백수현상이 가장 심한지역에서의 총체 벼의 조단백질 함량 및 TDN 함량은 벼 백수현상이 없는 정상생육 지역 보다 약간 높은 함량을 보였으나 ADF 및 NDF 함량은 현저하게 감소되었다 (p<0.05). 벼 백수현상이 가장 심한지역과 정상지역의 총체 벼 사일리지 pH는 4.0~5.0을 나타냈으며 젖산균 접종에 의해 pH가 저하되었다. 벼 백수지역과 정상생육지역 모두 젖산균 접종에 의해 젖산함량은 증가하였으며 초산과 낙산함량은 감소되었다(p<0.05). Flieg법에 의한 총체 벼 사일리지의 품질등급은 젖산균을 접종함으로써 2~3단계 상승되었다. 따라서 본 연구의 결과에서 나타난바와 같이 백수현상이 나타난 벼도 조사료원으로 활용될 수 있다.