• 제목/요약/키워드: unisexual

검색결과 17건 처리시간 0.024초

Pattern of Sexual Dimorphism in Garcinia kola (Heckel) Plantation

  • Henry Onyebuchi, Okonkwo;Godwin Ejakhe, Omokhua;Uzoma Darlington, Chima
    • Journal of Forest and Environmental Science
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    • 제38권4호
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    • pp.275-283
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    • 2022
  • A study was designed to investigate the pattern of sexual dimorphism in a plantation of Garcinia kola. Twenty trees were randomly selected for the study and have been observed to flower regularly. A total of 100 inflorescence were randomly collected from the crown of each tree and 500 flowers randomly assessed within the period of four (4) flowering seasons. Floral sex assessment was done visually and with a hand magnifying lens; floral morphometric measurements (i.e. pedicel and perianth length and breadth), inflorescence length, and breadth) was taken using a veneer caliper; number of flowers per inflorescence and inflorescence per twig was counted; while, data analysis was conducted on excel using analysis of variance and pairwise t-test comparison. Four floral sexes were identified in the G. kola plantation studied which were unisexual male flowers, unisexual female flowers, cosexual unisexual male flowers, and cosexual hermaphrodite flowers. Three tree sexes were identified viz: inconstant male, invariant female, and cosexual trees. The plantation was significantly sexually dimorphic in floral sex and phenotypic traits (i.e. pedicel and perianth size), and as well as sexually dimorphic in tree sex and reproductive phenotypic traits (i.e. inflorescence size, number of inflorescences per twig, and number of flower bud per inflorescence). The sexual system of the plantation was therefore trioecious with features suggestive of evolving dioecy through the gynodioecious pathway.

기름종개와 왕종개의 잡종복합군의 2배체와 3배체에 관하여 (Diploid-triploid Hybrid Complex of the Spined Loach Cobitis sinesis and C.longicorpus(Pices, Cobitidae))

  • 김익수;이지현
    • 한국어류학회지
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    • 제2권2호
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    • pp.203-210
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    • 1990
  • 기름종개 C. sinensis와 왕종개 C. longicorpus가 함께 서식하는 낙동강상류의 여러 수역에서 이들사이의 잡종이라고 추측되는 개체들이 높은 반도 (43%)로 출현하였는데 그들은 모두 암컷이었다. 이들 잡종 개체들은 체측에 특이한 구름무늬 반문을 가지면서 형태적으로는 기름종개와 왕종개의 중간형질을 보여주고 그들의 염색체수는 2배체형 인 49개이거나 3배형인 73개이었다. 이들은 기름종개와 왕종개 사이에 잡종에서 유래된 후 이 종과는 독립된 단성복합집단(unisexual complex) 이라고 생각한다.

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Reproduction of Rhodochorton purpureum from Jeju Island, Korea and SanJuan Island, Washington, USA in Laboratory Culture

  • West, Kathryn A.;West, John A.;Lee, Yong-Pil
    • ALGAE
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    • 제21권1호
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    • pp.103-107
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    • 2006
  • Rhodochorton purpureum 4187 from Jeju Island, Korea may have a sexual life history similar to that seen by other investigators working on other strains around the world. In culture short days (8:16, 11:13, 12:12 LD) at 10-15°C induced tetrasporogenesis. Discharged spores were observed with time lapse videomicroscopy. They showed a slight amoeboid movement for 2-3 minutes before rounding up and settling. Tetrasporelings develop into male and female gametophytes. No fertilisation was observed. Tetrasporangia often were borne on carpogonial clusters of females but no discharged spores were seen. Isolate 4241 from San Juan I., Washington, USA grew well in most conditions tested but did not reproduce in short days (8:16, 11:13, 12:12 LD) at 10-15°C.

한국경찰모자의 형태개발에 관한연구 (A STUDY ON THE FORMAL DEVELOPMENT OF KOREAN POLICEMAN'S HEADGEAR)

  • 강병석
    • 복식
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    • 제27권
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    • pp.173-188
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    • 1996
  • The purpose of this study is to present the form of Korean policeman's headgear which is endowed with traditional Korean characters and a creative property that has distinctive from other headgears. The investigation was carried out through the researh of policeman's headgears in foreign countries such as United Kingdom France Belgium Italy germany and Japan. The dom-estic investigation was carried out through the Focused Group Interview and analysis on the domestic policeman's service and headgear. Lastly the research into the characteristic of Korean traditional headgear's from was carried out. Consequently two types of policeman's head-gear hat and cap were newly developed and the system of practical use was suggested. The results of this study were as follows: 1. Through the use of traditional and formal elements of Korean ancient headgears korean policeman's headgears were improved in distinc-tion and dignity. 2. Through the use of unisexual form police-man's headgears were improved in uniformity. 3. Through the use of transformal accessories policeman's headgear were improved in simplified system. 4. Through the use of newly formed and lighten weighted materials policeman's head-gears were improved in functionability.

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패션을 중심으로 한 온라인 게임과 대중 스타와의 상관관계 (Correlation between On-line Game and Popular Stars - Focused on Fashion -)

  • 손이정;이인성
    • 한국의류산업학회지
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    • 제10권6호
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    • pp.811-821
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    • 2008
  • This study examined on the most noticeable game industry in a digital era, and on the definition and feature of post-digital generation enjoying it, along with the relations with the game. Especially, this paper examined correlations between game characters' fashion and pop singers' fashion targeting post-digital generation enjoying games. As the result of this study, on-line game's popularity affected popular culture and game business and popular stars have close interrelation. In addition, through variosus objective surveys, the game characters' fashion was classified into five images before being analyzed; fighter's image, retro image, surreal image, sensual image, and unisexual image. The game characters' fashion wasn't only analyzed also studied correlation between on-line game character's fashion and pop singers' fashion by five images. Consequently in case of game characters' fashion, it influenced on pop singers' fashion targeting teens and twenties enjoying games, which meant fashion connections between game characters and pop singers.

한국산 목본식물에 대한 계통분류학적 연구 -녹나무과의 외부 형태- (Systematic Studies on Some Korean Woody Plants -External Morphology of Lauraceae-)

  • Sun, Byung-Yun
    • Journal of Plant Biology
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    • 제27권3호
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    • pp.129-138
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    • 1984
  • Floral structures of 11 korean lauraceous species belonging to six genera have been studied. Machilus is a primitive genus having relatively large bisexual flower, six tepals and staminodes in fourth whorl of stamen. The flowers of Neolitsea are highly reduced state as unisexual flower, six stamens arranged to three whorls and no staminode in the flower, so regared as more advanced group. Intrafamilial classification systems of Nakai (1939) and Pax (1891) are more reasonable but still have some discrepancies with results. The origin of tepals of this group has been a long controversial problem; whether the differentiation of tepals occur. Teratological study of Lindera erythrocarpa, inner tepals of this group must be originated from the staminode and outer tepals from leafy tepals. Although morphological differentiation does not sitll occur, inner and outer whorls of tepals are originated through different way.

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성별에 따른 청바지 착용자의 의복행동 차이 (A Difference of Clothing Behavior of Jean's Wearer According to the Gender)

  • 이정숙;성수광
    • 한국의류산업학회지
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    • 제6권3호
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    • pp.336-340
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    • 2004
  • This is the result of the comparison of the number of jeans, colors, images, opinions when it was purchased, shapes according to the gender of persons in jeans. According to the gender, male students had 1.64 jeans(46.3%) and female students had 2.09 jeans(53.7%) on the average. Male students selected colors of jeans which they don't have, but want to wear once in the order of blue(3.7%), red(21.0%), white(24.1%), black(25.6%), and others(25.6%). Female students selected colors in the order of blue(3.2%), black(15.6%), red(24.8%), white(27.7%) and others(25.6%). In case of the general image about jeans, male students thought the jeans as masculine(1.2%), sexy(3.1%), unisexual(3.2%), active(23.6%), young(29.8%), and comfortable(36.5%) and female students thought it as masculine(0.3%), sexy(3.5%), unisexual(10.4%), young(21.9%), comfortable(28.1%) and active(35.8%). Male students considered torn or holed jeans ill-mannered(10.7%), delinquent, (20.7%)trendy(21.0%), comfortable(22.9%), and dandy(24.7%). Female students think it ill-mannered(3.4%), delinquent7.1%, trendy(17.4%), comfortable(21.1%), and dandy(50.9%). When they purchase jeans, male students choose according to trends(17.9%), don't consider design(19.5%) and look for their own styles(62.6%), female students didn't consider design(5.2%), choose according to trends(22.0%), and look for their own styles(72.5%). The designs of jeans which they usually wear were bell bottom(1.5%), wide-shaped(7.4%), baggy(17.5%), straight-shaped(73.6%) in case of male students. on the other hand, in case of female students, baggy(10.2%), wide-shaped(11.0%), bell bottom(17.0%), and straight-shaped(61.8%). The designs of jeans which they didn't have but want to wear once are wide-shaped(10.1%), bell bottom(13.2%), baggy(20.9%), and straight-shaped(55.2%) in case of male students. On the other hand, females students want to wear baggy(11.6%), wide-shaped(15.0%), straight-shaped(27.6%), and bell bottom(45.8%). The above-mentioned findings illustrated that both male and female students regarded blue as the original color of jeans, but they wanted to wear jeans in colors other than blue. In the past, jeans were considered masculine and unisex, but they viewed jeans as an apparel that was comfortable to wear and made it easier to move. Female students had a higher tendency to be fashionable than male students, and their preference for jeans was consequently different. Jeans manufacturers should take those characteristics into account to produce products in different colors and form.

Cobitis hankugensis-Iksookimia longicorpa Complex의 2배체, 3배체집단의 난막 미세구조 (Fine Structure of Oocyte Envelopes of Diploid and Triploid Biotypes in Cobitis hankugensis-Iksookimia longicorpa Complex)

  • 고명훈;박종영
    • 한국어류학회지
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    • 제22권1호
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    • pp.56-60
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    • 2010
  • 기름종개와 왕종개로부터 기원한 단성생식집단인 Cobitis hankugensis-Iksookimia longicorpa complex는 대부분 암컷으로만 구성되어 있으며 최근에 1종류의 2배체와 2종류의 3배체집단이 확인되었다. 이들의 난막구조를 조사한 결과 3가지 종류로 구분될 수 있었다. 융모형은 이들의 부모종인 왕종개에서 확인되었으며, 과립형은 기름종개와 3배체집단, 그리고 과립을 가진 융모형은 2배체집단에서 나타났다. 특히 과립형을 가지는 3집단에서는 그들의 길이와 밀도에서 서로 차이를 보였다. 이러한 구조들은 cobitid complex에서 처음 보고될 뿐 아니라 2배체, 3배체 complex집단을 분류하는 데 이용될 수 있다.