• Title/Summary/Keyword: collected lines

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Seed Yields and Germination Rates of Native Ecotype Collections for the Development of High-Yield Seeded Variety of Zoysiagrass in Korea (다수확 종자형 품종 육성을 위한 자생 한국잔디 수집계통들의 종자 수확량과 발아율)

  • Bae, Eun-Ji;Han, Jeong-Ji;Choi, Su-Min;Lee, Kwang-Soo;Park, Yong-Bae;Yang, Geun-Mo;Choi, Joon-Soo
    • Weed & Turfgrass Science
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    • v.5 no.2
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    • pp.95-100
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    • 2016
  • Seeded variety of zoysiagrass has not been bred yet in Korea. Development of seeded zoysiagrass cultivar will be very important for the growth of turfgrass industry internationally as well as domestically. This research was conducted to investigate seed yield and germinability of 102 collected native zoysiagrass ecotypes in South Korea. Two hundred and seventy seven ecotypes were collected from various locations including coastal and mountain areas, while 102 morphologically distinct and seed producing ecotypes were selected and planted in $1m{\times}1m$ maintenance plots. Seed yield ranged from 0.1 to $32.2g\;m^{-2}$. Highest yielding line was a medium leaf type zoysiagrass of Z6011 with $32.2g\;m^{-2}$. Most collected lines showed seed germination rates of below 50%. However, Z2095 showed highest germination rate of 78%. Considering germination rate and seed yield, collected lines of Z6011, Z 6015, Z1075, ZN1008, and Z1084, which were mostly medium leaf type and Z. japonica types, showed reasonably high potential to be used as breeding lines for high yield seed varieties of zoysiagrass.

Varietal and Yearly Differences of Lignan Contents in Fruits of Collected Lines of Schizandra chinensis Baillon (오미자 수집종별 리그난 함량의 연차간 차이)

  • Kim, Kwan-Su;Park, Chun-Gun;Bang, Jin-Ki
    • Korean Journal of Medicinal Crop Science
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    • v.11 no.1
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    • pp.71-75
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    • 2003
  • To know the varietal difference and yearly changes of lignan contents in the fruits of collected lines of Schizandra chinensis Baillon, three lignan compounds, schizandrin, gomisin A, and gomisin N, were quantitatively analyzed using High Performance liquid Chromatography. The average contents of schizandrin, gomisin A, and gomisin N, showed 0.78%, 0.25%, and 0.63% in the 6-year-old fruits of 24 lines harvested in 1996, and 0.72%, 0.22%, and 0.63% in the 7-year-old ones of 59 lines harvested in 1997. There were the wide range of coefficient of variation (CV) values, the significant differences by the lines and harvest years, and the significant interaction between line and year for lignan contents. Schizandrin contents during 3 years, $1995{\sim}1997$, showed relatively higher amounts more than 0.9% in Chungju 143, Chungju 453, and Chungju 532. Among 23 lines analyzed from 1995 to 1997, Chungju 542, Chungju 547, and Chungju 580 contained continuously higher amounts more than 0.8% of schizandrin and had lower CV values of lignan contents by the harvest years than the other lines. There were a highly significant and negative correlation between fruit weight and lignan contents, and a positive correlation among contents of schizandrin, gomisin A, gomisin N, and total lignan.

A Comparison Study between Korean and Foreign Shipping Lines on Logistics Service Attributes and Capability (국적선사와 외국적선사의 물류서비스 속성과 역량에 관한 비교 연구)

  • Lee, Sang-Yun;Go, Hyeon-Jeong
    • Proceedings of the Korea Port Economic Association Conference
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    • 2006.08a
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    • pp.291-309
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    • 2006
  • In order to obtain and maintain competitive advantage, under rapidly changing maritime environment, liners should make efforts to reinforce their logistics service capabilities. Most of all, for this, shipping lines should accurately recognize and evaluate their logistics service attributes. In the present research, various logistics service attributes for ocean carriers were selected from previous studies and the observed data for 6 main service attributes were collected through a questionnaire survey to 31 maritime experts. Moreover, shipping lines' relative logistics service capabilities were measured by an additional survey process. The comparative gravity between core evaluation factors were measured by AHP technique and the relative capability levels of 2 Korean liners and 5 foreign shipping companies were assessed by utilizing a fuzzy model. The empirical result presents that Korean liners are superior at customer service capability but inferior at freight rate competitiveness. This research shows that Korean liners are ranked at high position for overall logistics service capabilities and focusing on the differentiation strategy but not on the cost related strategy.

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Fruit Yield and Quality Evaluation of Sweet Pepper (Capsicum annuum L.) F1 Hybrids Derived from Inbred Lines

  • Shrestha, Surendra Lal;Luitel, Binod Prasad;Lee, Taek Jong;Kang, Won Hee
    • Korean Journal of Breeding Science
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    • v.42 no.4
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    • pp.344-350
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    • 2010
  • Sweet pepper inbred lines (KNU1003, KNU1006, KNU1007, KNU1009, KNU1015, KNU1017 and KNU2006) developed at Kangwon National University (KNU) through conventional means, inbred lines (5AVS1, 5AVS2, 5AVS3, 5AVS5, 5AVS7 and 5AVS8) collected at Rural Development Administration (RDA) and inbred lines (SP12, SP27 and SP14) derived from anther culture were used as female parents and anther culture derived homozygous lines (SP9, SP10, SP14, SP24, SP25, SP27, SP30, SP32, SP34, SP38, SP43, SP45 and SP51) were used as male parents to produce $F_1$ hybrids. A total of 37 $F_1$ hybrids were evaluated for fruit yield and quality characters in summer season, 2007. Variation in fruit number, fruit weight, fruit yield per plant and fruit volume was observed among the $F_1$ hybrids. Superiority on yield over standard/commercial varieties were differed among $F_1$ hybrids. Hybrid $5AVS8{\times}SP45$ exhibited highest heterosis over Special (16.5%) and Fiesta (24.7%). Fruit quality characters (fruit length, fruit width, pericarp thickness, total soluble solid, fruit shape and fruit color) were varied among the $F_1$ hybrids. Fruit number, fruit weight and fruit volume per plant were correlated with fruit yield. Based on the standard heterosis expressed by the hybrids and quality characters evaluation, $KNU1017{\times}SP27$, $5AVS1{\times}SP43$, $5AVS5{\times}SP27$, $5AVS8{\times}SP45$, $SP12{\times}SP38$ and $SP27{\times}SP25$ hybrids were found to be superior over commercial cultivars and are selected. Inbred lines of these hybrid combinations can be used to produce $F_1$ hybrid seed for commercial production.

Analysis of Genetic Characteristics of Korean Native Chicken Using DNA Marker (DNA Marker를 이용한 한국 재래닭의 유전특성 분석)

  • 이학교;이성진;황규춘;정일정;박용호;손시환;신영수;오봉국;한재용
    • Korean Journal of Poultry Science
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    • v.23 no.4
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    • pp.177-183
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    • 1996
  • This study was conducted to analyze genetic characteristics of Korean Native Chicken three lines classified on the basis of the feather color and appearance (Red, Yellow, and Black) using DNA fingerprinting method. To estimate the genetic relatedness among breeds and similarities within breeds, we collected blood samples from Korean Native Chicken (KNC), Rhode Island Red (RIR), White Leghorn (WL), and Cornish(CN) and obtained genomic DNA from the blood of 10 individuals randomly selected within the breeds and lines. The genomic DNA samples were digested with restriction enzymes (Hinf J, Hae Ill) and hybridized with various probes (Jeffreys' probes 33.15, 33.6 and M13) after Southern transfer. Genetic similarities within breeds were characterized by band sharing (BS) value, estimated by the DFP band pattern between the pair of lanes. BS values within WL, RIR, and KNC were 0.82, 0.70 and 0.56, respectively. Relative genetic diversity (BS value) of KNC was higher than those two breeds (WL, RIR). Estimation of genetic similarity between KNC lines and control breed (RIR) was 0.32, whereas similarity within KNC lines (6 groups) was 0.50. In this analysis, KNC was showed to have a highly genetic diver-sity at the DNA level, and to be closer in genetic distance to RIR (0.67) than any other breeds.

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Improved plastid transformation efficiency in Scoparia dulcis L.

  • Kota, Srinivas;Hao, Qiang;Narra, Muralikrishna;Anumula, Vaishnavi;Rao, A.V;Hu, Zanmin;Abbagani, Sadanandam
    • Journal of Plant Biotechnology
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    • v.46 no.4
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    • pp.323-330
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    • 2019
  • The high expression level of industrial and metabolically important proteins in plants can be achieved by plastid transformation. The CaIA vector, a Capsicum-specific vector harboring aadA (spectinomycin resistance), is a selectable marker controlled by the PsbA promoter, and the terminator is flanked by the trnA and trnI regions of the inverted repeat (IR) region of the plastid. The CaIA vector can introduce foreign genes into the IR region of the plastid genome. The biolistic method was used for chloroplast transformation in Scoparia dulcis with leaf explants followed by antibiotic selection on regeneration medium. Transplastomes were successfully screened, and the transformation efficiency of 3 transgenic lines from 25 bombarded leaf explants was determined. Transplastomic lines were evaluated by PCR and Southern blotting for the confirmation of aadA insertion and its integration into the chloroplast genome. Seeds collected from transplastomes were analyzed on spectinomycin medium with wild types to determine genetic stability. The increased chloroplast transformation efficiency (3 transplastomic lines from 25 bombarded explants) would be useful for expressing therapeutically and industrially important genes in Scoparia dulcis L.

Effects of Duroc Breeding Lines on Carcass Composition and Meat Quality

  • Choi, Jung-Seok;Jin, Sang-Keun;Choi, Yang-Il;Lee, Jae-Joon
    • Food Science of Animal Resources
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    • v.35 no.1
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    • pp.80-85
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    • 2015
  • This study was performed to investigate the carcass composition and pork quality of Duroc breeding lines in Korea. A total of 200 Duroc pigs were used, and those were originated from four different great-grandparent (GGP) breeding stock farms (L1: N farm, L2: W farm, L3: S farm, L4: R farm). The carcasses of pigs from these farms were collected, and meat quality traits were evaluated. L1 and L2 had smaller carcass weights and thin backfat, whereas L3 and L4 had heavy carcass weights and thick backfat. L3 and L4 had higher contents of fat and protein than L1 and L2. For the meat quality characteristics, L1, L2, and L4 had higher pH values than L3. In addition, L4 had higher water holding capacity than the other lines. L4 had the highest sensory evaluation scores with regard to both juiciness and flavor. Consequently, the study results indicate that pork quality information from domestic Duroc breeding stock lines could be used to effectively improve pork quality in Korea.

Age determination of the Mongolian wild ass (Equus hemionus Pallas, 1775) by the dentition patterns and annual lines in the tooth cementum

  • Lkhagvasuren, Davaa;Ansorge, Hermann;Samiya, Ravchig;Schafberg, Renate;Stubbe, Anne;Stubbe, Michael
    • Journal of Species Research
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    • v.2 no.1
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    • pp.85-90
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    • 2013
  • Based on 440 skulls recently collected from two areas of the wild ass population in Mongolia, the time course of tooth eruption and replacement was investigated. The dentition pattern allows identification of age up to five years. We also conclude that annual lines in the tooth cementum can be used to determine the age in years for wild asses older than five years after longitudinal tooth sections were made with a low-speed precision saw. The first upper incisor proved to be most suitable for age determination, although the starting time of cement deposition is different between the labial and lingual sides of the tooth. The accurate age of the wild ass can be determined from the number of annual lines and the time before the first formation of the cementum at the respective side of the tooth.

Cross Affinity of Korean Weedy Rice to the Cultivars (국내 수집 잡초성 벼의 재배 품종에 대한 잡종 친화성)

  • Heu, Mun-Hue;Cho, Yong-Chul;Suh, Hak-Soo
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.35 no.3
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    • pp.233-238
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    • 1990
  • Weedy rice(red rice) collected in Korea were crossed with the Japonica, Javanica and Indica tester cultivars, and also crossed among those collected lines. Their seed fertility was counted and refered to their cross affinities. Some tester cultivars such as, Suweongjo, Malagkit Sinaguing and wx 817 which were regarded as belong to the Japonica, Javanica and Indica respectively, showed the typical tendencies of hybrid sterility when they were crossed each other. But, other testers such as Kwanak, Tapaiko, Belle Patna and Tarichaosun showed some differencies from those typical patterns, implying some varigations within a ecotype. The hybrids of weedy rice crossed to the Japonica testers showed higher fertility with a few semisterilities. While the crosses of weedy rice to the Javanicas or Indicas showed high sterility implying closer affinity relationships of weedy rice to the Japonicas. Even those weedy rice lines such as Samsanmyeon 8 and Sanchungaengmi B which showed semi-sterility when they were crossed to the Japonica testers showed high sterility when they were crossed to both Javanicas and Indicas. The hybrids among weedy rice lines showed high fertility raning 69% to 96%. Even those weedy rice lines which showed semi-sterility in the crosses with Japonica testers, showed high-fertility when they were crossed with those weedy rice lines. Though the amylose content, Alkali Digestive Value, Phenol reaction and grain shapes of theose weedy rice lines showed divers variations, the cross affinities of them showed closer phylogenie relationship to the Japonicas than to Japvanicas or Indicas. But the genetic influinces of Indicas to those weedy rices were not ignorable.

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