• Title/Summary/Keyword: morphological relationship

Search Result 455, Processing Time 0.025 seconds

Taxonomic Status of Acheilognathus sp. (Cyprinidae) found in the Geum River, Korea (금강에서 발견된 Acheilognathus sp. (Cyprinidae)의 분류학적 위치)

  • Chae, Byung Soo;Kim, Sang Ki;Lee, Jin Hee;Hwang, Ui Wook
    • Korean Journal of Ichthyology
    • /
    • v.26 no.4
    • /
    • pp.249-258
    • /
    • 2014
  • To examine the taxonomic status of Acheilognathus sp. specimens from the Geum River, morphological and genetical characteristics of A. sp., A. yamatsutae and A. majusculus were investigated and compared in detail. Specimens of A. sp. could be distinguished from the other two species by the combination of some morphological characters such as nuptial color, vertebrae, gillrakers and etc. Males of A. sp. had red bands on the outer margin of dorsal and anal fins and a white band on the outer margin of ventral fin in breeding season. A. sp. had larger maximum body length and somewhat more vertebrae than A. yamatsutae, and had fewer gillrakers than A. majusculus. A. sp. appeared as a monophyletic group with A. majusculus and A. cyanostigma based on genetic analysis. In addition, it had even more close relationship with other congeners than A. yamatsutae. Therefore it is presumed that A. sp. from the Geum River may be a distinct species in genus Acheilognathus.

Using Syntactic Unit of Morpheme for Reducing Morphological and Syntactic Ambiguity (형태소 및 구문 모호성 축소를 위한 구문단위 형태소의 이용)

  • Hwang, Yi-Gyu;Lee, Hyun-Young;Lee, Yong-Seok
    • Journal of KIISE:Software and Applications
    • /
    • v.27 no.7
    • /
    • pp.784-793
    • /
    • 2000
  • The conventional morphological analysis of Korean language presents various morphological ambiguities because of its agglutinative nature. These ambiguities cause syntactic ambiguities and they make it difficult to select the correct parse tree. This problem is mainly related to the auxiliary predicate or bound noun in Korean. They have a strong relationship with the surrounding morphemes which are mostly functional morphemes that cannot stand alone. The combined morphemes have a syntactic or semantic role in the sentence. We extracted these morphemes from 0.2 million tagged words and classified these morphemes into three types. We call these morphemes a syntactic morpheme and regard them as an input unit of the syntactic analysis. This paper presents the syntactic morpheme is an efficient method for solving the following problems: 1) reduction of morphological ambiguities, 2) elimination of unnecessary partial parse trees during the parsing, and 3) reduction of syntactic ambiguity. Finally, the experimental results show that the syntactic morpheme is an essential unit for reducing morphological and syntactic ambiguity.

  • PDF

Genetic and Morphological Relationship among Korean Hylotelephium Species(Crassulaceae) (한국산 꿩의비름속(돌나물과) 식물의 유전적, 형태적 유연관계)

  • Lee, Seung-Hoon;Park, Ki-Ryung
    • Korean Journal of Plant Taxonomy
    • /
    • v.36 no.4
    • /
    • pp.293-308
    • /
    • 2006
  • Genetic and morphological studies using morphological and isozymic data from 20 populations of 6 Korea Hylotelephium were conducted to resolve the species relationships and the origin of polyploid species. The results of morphological studies suggest that triploid H. viviparum is closely related to H. verticillatum, and the high frequency alleles of two species were very similar each other in isozyme analyses. Unique fixation of $PGI-1^b$ in two species supports that H. verticillatum should be the diploid ancestor of H. viviparum. However, a unique $ALD-1^c$ allele is present in H. viviparum, and the lack of the common alleles of H. erythrostictum and H. spectabile in this species eliminated them from the candidates of another tetraploid ancestor of H. viviparum. Based on the high morphological and genetic similarities, our results supported that the Korea endemic H. viridescens might be originated from the H. erythrostictum or share a common ancestor with it. Besides, H. ussuriense is closely related with H. erythrostictum and H. viridescens.

Development of EST-SSR Markers and Analysis of Genetic Diversity Using Persimmon (Diospyros kaki Thunb) Cultivars Collecting from Domestic (국내 수집 감 품종을 이용한 EST-SSR marker 개발과 유전적 다양성 분석)

  • Seo, Dong Hywi;Jung, Kyung Mi;Kim, Se Jong;Kim, Kyung-Min
    • Korean Journal of Plant Resources
    • /
    • v.26 no.4
    • /
    • pp.491-502
    • /
    • 2013
  • Persimmon (Diospyros kaki Thunb) fruit is one of the most important fruit and have been cultivated from ancient times in Korea. In this study, we found 16 EST-SSR markers that contained one or more EST-SSR sites from 246 cDNA sequences. The developing of EST-SSR marker analysis from 42 persimmon cultivars was compared by genetic relationships and morphological relationships using 6 qualitative traits (fruit related 6 traits) and 19 quantitative traits (flower related 19 traits). In this study, 25 primer sets were tested to identify PCR polymorphism and 14 potential EST-SSR primer pairs were selected. The result of morphological relationship EST-SSR marker analysis showed that the coefficient 0.02 was difficult to categorize in several groups. And then, coefficient 0.77 of genetic relationship showed that the group was classified as four groups. The result of correlation distance between genetic relationship and morphological relationship were investigated was low significance (-0.03). Our results also provided an optimized method for improvement of breeding efficiency and introduce of superior character at persimmon cultivars using EST-SSR markers which was useful for further investigation.

Electrical and morphological properties of titanium silicide fabricated by high temperature sputtering method (고온스퍼터링법으로 제작된 티타늄실리사이드의 구조적 전기적 특성 연구)

  • Lee, S.J.;Kim, D.S.;Seong, K.S.;Kang, Y.M.;Cha, J.H.;Song, M.K.;Jung, W.;Kim, D.Y.;Lee, Y.H.;Cho, H.Y.;Hong, J.S.
    • Proceedings of the IEEK Conference
    • /
    • 2000.06b
    • /
    • pp.60-63
    • /
    • 2000
  • We have investigated the relationship between electrical and morphological properties of titanium silicide films. In this study, the C54 titanium silicides were formed by using high temperature sputtering and one-step annealing. From the measurement of electrical and morphological properties, a smooth surface and a relaxed roughness were observed for the titanium silicide film fabricated by high temperature sputtering. And it seems that the previous effect could improve electrical properties.

  • PDF

Early Selection of Double Flowers Based on Cotyledon Shape in Cut Stock (Matthiola incana L.) Flowers

  • Irani, Sepideh Famil;Arab, Mostafa
    • Horticultural Science & Technology
    • /
    • v.35 no.2
    • /
    • pp.265-275
    • /
    • 2017
  • Selection of double-flowered plants at the seedling stage is one of the main purposes of stock breeding programs. Eight stock cultivars of Matthiola incana L. named 'Nobel', 'Cinderella', 'Pacific', 'Avalanche', 'Midblue', 'Lavender', 'Goddess' and 'Esfahan', with different percentage of double-flowered plants were used for examining the relationship with three morphological types of cotyledons. The results of a chi-square test indicated that in heart-shaped (HC) and cup-shaped cotyledon (CC) populations, the number of plants with double flowers was much more than that of single flowers and CC seedlings rarely produced single flowers. Therefore, increasing the number of CC seedlings can improve the percentage of double flowers. The highest and lowest numbers of CC seedling were observed in high double and single flower cultivars, respectively. Single flower cultivars showed the maximum count of dumbbell-shaped cotyledons. Chromosome pairing of these cultivars was evaluated using the squash technique. Aneuploid cells were found in 'Nobel' and 'Goddess' cultivars, which showed the highest percentage of CC seedling. Based on morphological measurements, the highest value of inflorescence size was observed in the seedlings with cup-shaped cotyledons.

The Effects of Fatty Acids Supplementation in Culture Medium on Proliferation and Lipid Peroxides Production of Fibroblast from Neonate Rats (신생흰쥐 피부섬유아세포의 배양액의 지방산의 종류와 양을 변화시켰을 때 세포의 증식과 지질과산화물 생성에 미치는 영향)

  • 장영애
    • Journal of Nutrition and Health
    • /
    • v.29 no.2
    • /
    • pp.159-165
    • /
    • 1996
  • This study was performed to investigate the effects of concentration and degree of unsaturation of fatty acids on cellular proliferation and lipid peroxide production, using primary skin fibroblasts from neonate rats Fibroblasts (CPD : 2.8-5.4). Cells were cultured either in control medium (Dulbecco's modified Eagle's medium supplement with 10% fetal bovine serum) or in media supplemented with various kinds (stearic, oleic, linoleic, arachidonic, linolenic, eicosapentaenoic acid) and amounts (5, 10, 25, 50, 100, 150uM)of fatty acids. Cellular proliferation ratio and lipid peroxice production were measured and morphological changes were observed. Cellular proliferation was inhibited and morphological changes were observed. Cellular proliferation was inhibited and morphological changes were observed in cells grown in stearic containing media. Oleic, arachidonic, and eicosapentaenoic aicd tend to stimulate cellualar proliferation, and linolenic acid had no effects. Lipid peroxide concentrations in fibroblasts increased in proportion to the contents and unsaturation of fatty acids in media. Especially supplementation of arachidonic acid accelerated cellualr lipid peroxidation. Free radicals may cause severs damage to biological molecules, so lipid peroxidation probably contributes cellular membrane damages. However there were little relationship between lipid peroxide production and cellular proliferation in this study. (Korean J Nutrition 29(2) : 159~165, 1996)

  • PDF

Accumuation Pattern of Nitrate-Nitrogen in Sorghum And Maize Plants as Affected by Morphological Characteristics And Environmental Temperature (Sorghum 및 옥수수의 형태적 특성과 재배온도가 Nitrate-Nitrogen 축적에 미치는 영향)

  • 김정갑
    • Journal of The Korean Society of Grassland and Forage Science
    • /
    • v.7 no.3
    • /
    • pp.146-152
    • /
    • 1987
  • Sorghum cv. Pioneer 93 1, sorghum-sudangrass hybrid cv. Sioux and maize plant cv. Blizzard were assayed for toxic concentrations of nitrate-nitrogen ($NO_3$-N) and their relationship to morphological characteristics and environmental temperature in a field and phytotron trial. In the phytotron, sorghum and maize plants ranging from emergence to heading stage, were grown under different day/night temperatures of 30125, 25/20,28/18 and 1818 degree C. Nitrate-nitrogen in sorghum and maize plants was accumulated mainly in stems. Therefore nitrate concentration in the young plants was increased as development of stalks advanced and was highest at the stage of 3-4 leaves, when the plants had a leaf weight ratio 0.78-0.80 g/g plant weight. However, nitrate concentrations of the plant decreased as morphological development progressed, especially from the stage of growing point differentiation. Correlation coefficients showed a positive correlation of nitrate concentration with leaf weight ratio, leaf area ratio and specific leaf area, while plant height, dry matter percentage and absolute growth rate showed a negative association with TEX>$NO_3$-N ($P{\le}0.1$%). Cyanogenic glycosides, total nitrogen and crude protein were close associated with nitrate accumulation, and positively significant ($P{\le}0.1$%). High temperature over 30/25^{\circ}C.$ for 3 weeks increased N-uptake and dry matter accumulation, but reduced nitrate concentration. Under cold temperature below 18/8^{\circ}C.$ concentration of nitrate-N was increased in spite of its limited nitrogen uptake and plant growth.

  • PDF

Molecular Phylogeny Reconstruction of Grouper (Serranidae: Epinephelinae) at Northern Part of Bird's Head Seascape - Papua Inferred from COI Gene

  • Tapilatu, Ricardo F.;Tururaja, Tresia Sonya;Sipriyadi, Sipriyadi;Kusuma, Aradea Bujana
    • Fisheries and Aquatic Sciences
    • /
    • v.24 no.5
    • /
    • pp.181-190
    • /
    • 2021
  • Grouper is one of the most economically important fishes with various morphological forms and characteristics, meaning it is often difficult to identify species and distinguish between life stages, sometimes leading to morphological misidentification. Therefore, identification using a molecular deoxyribose nucleic acid (DNA) approach was needed as an alternative means to identify closely related species. This study aims to determine the molecular phylogeny of grouper from the northern part of the Bird's Head Seascape of Papua. The DNA sequence of each cytochrome oxidase I (COI) gene was used to study the molecular relationship among closely related species of grouper. The results showed that there were 16 Epinephelinae that have been compared to a gene bank (National Centre for Biotechnology Information, NCBI) in the sequence length of 623 base pairs. The closest genetic distance was found between Cephalopholis miniata and Cephalopholis sexmaculata (0.036), while the furthest genetic distance was observed between Plectropomus laevis and Cephalopholis spiloparaea (0.247). This finding was further reinforced by the morphological characters of each species. This finding highlighted that five genera were represented as a monophyletic group (clade), i.e., Epinephelus, Cephalopholis, Plectropomus, Saloptia and Variola.

RADIOMETRIC RESTORATION OF SHADOW AREAS FROM KOMPSAT-2 IMAGERY

  • Choi, Jae-Wan;Kim, Hye-Jin;Han, You-Kyung;Kim, Yong-II
    • Proceedings of the KSRS Conference
    • /
    • 2008.10a
    • /
    • pp.371-374
    • /
    • 2008
  • In very high-spatial resolution remote sensing imagery, it is difficult to extract the feature information of various objects because of occlusion and shadows. Moreover, various and feeble information within shadows can be of use in GIS-based applications and remote sensing analysis. In this paper, we developed a radiometric restoration method for shadow areas using KOMPSAT-2 satellite image. After detecting the shadow, non-shadow pixels nearby are extracted using a morphological filter. An iterative linear regression method is applied to calculate the relationship between shadow and non-shadow pixels. The shadows are restored by the parameters of the linear regression algorithm. Tests show that recovery of shadowed areas by our method leads to improved image quality.

  • PDF