• 제목/요약/키워드: Evolutionary Relationships

검색결과 99건 처리시간 0.025초

Microsatellite-based Genetic Diversity and Evolutionary Relationships of Six Dog Breeds

  • Ye, J.-H.;Ren, D.-R.;Xie, A.-F.;Wu, X.-P.;Xu, L.;Fu, P.-F.;Zhao, H.-A.;Yang, Qianyong
    • Asian-Australasian Journal of Animal Sciences
    • /
    • 제22권8호
    • /
    • pp.1102-1106
    • /
    • 2009
  • The Tibetan Mastiff is one of the most archaic, ferocious and the largest dogs in the world. The Kunming dog is the chief working-dog breed in China. In this study, ten microsatellite loci were used to assess the genetic diversity and evolutionary relationships in six dog breeds, including Tibetan Mastiff, Kunming dog, Belgian Malinois, Labrador Retriever, English Springer Spaniel, and German Shepherd. The highest genetic diversity was exhibited by the Tibetan Mastiff, indicating useful protection and little inbreeding in the modern Tibetan Mastiff. Higher genetic diversity was observed in European breeds, supporting the hypotheses that breeders outcross their pure breed dogs occasionally to avoid deleterious effects in Europe. Evolutionary relationships showed that English Springer Spaniel and Labrador Retriever were clustered together, then with the Tibetan Mastiff, consistent with previous cluster results. German Shepherd and Kunming dog were grouped together, coinciding with the breeding history of Kunming dog. It is the first time that Tibetan Mastiff and Kunming dog have been analyzed with microsatellites.

18S 리보좀 RNA 부분 염기서열에 의한 Trichoderma속 및 관련 불완전균류의 진화학적 유연관계 (Evolutionary Relationships of the Genus Trichoderma and Related Taxa Based on the Partial Sequences of 18S Ribosomal RNA)

  • 이광재;안원근;이재동;주우홍
    • 한국균학회지
    • /
    • 제23권4호통권75호
    • /
    • pp.318-324
    • /
    • 1995
  • Trichoderma속과 관련군의 진화학적 유연관계를 18S 리보좀 RNA 부분염기배열 (1419-1623)에 의하여 결정하였다. 계통수는 3개로 대별되었다 (Saccharomyces cerevisiae-Geotrichum klebahnii-Alternaria mali group, Neurospora crassa-Aspergillus-Penicillium-Chrysosporium pannorum-Scopulariopsis sp. group, Trichoderma group). Trichoderma속은 계통적으로 오래전에 Saccharomyces cerevisiae, Aspergillus, Penicillium groups과 분화되어 독자적인 진화경로를 거쳐온 것으로 믿어진다.

  • PDF

양육과 애착의 진화 (The Evolution of Caregiving and Attachment)

  • 최성구
    • 생물정신의학
    • /
    • 제24권3호
    • /
    • pp.83-94
    • /
    • 2017
  • Caregiving for the children seems to be one of the most challenging tasks for the parents who should devote themselves totally despite endangering them. From the evolutionary perspective, this human behavior must have been the advantage in the survival of the species and rooted in ethological origin. John Bowlby, a child psychiatrist, psychoanalyst, and great developmental researcher, had formulated the attachment theory linking psychoanalysis and ethology through evolutionary biology. His and later following researchers' outcomes have provided enormous influence on viewing parental caregiving and the insight of human relationships and interventions. This article overviews the attachment theory in terms of the goal oriented cybernetic system to gain the survival advantage of the offspring and investigates the evolutionary origin of the caregiving and attachment from the retiles of the Mesozoic era to the mammalian revolution and finally to the human being. Deeper understanding of the nurturance and adult relationships from the standpoint of evolution can provide clinical utility of awareness of clients' lives.

진화론적 방법을 이용한 간호사의 태움 개념분석 (An Evolutionary Concept Analysis of Taeoom among Nurses)

  • 정희자
    • 문화기술의 융합
    • /
    • 제5권4호
    • /
    • pp.157-169
    • /
    • 2019
  • 본 연구의 목적은 간호사 태움에 대한 개념분석을 통해 그 개념을 명확히 하고, 유사개념인 직장 내 괴롭힘(workplace bullying)과의 차이를 규명하여 간호이론과 지식개발을 위한 기초자료를 마련하고자 함이다. 본 연구는 Rodgers의 진화론적 방법에 따라 태움에 대한 개념분석을 실시하였으며, 검색된 총 125편의 논문 중 본 연구에 필요한 15의 논문을 정독한 후 분석하였다. 연구결과로 나타난 태움의 속성은 통과의례, 고통스러운 인간관계, 언어적 공격, 업무관계였다. 본 연구결과 태움과 집단 내 괴롭힘은 다른 개념으로 추후 간호연구와 실무에서 구분되어 사용되어야 하며, 태움의 속성이 시대와 사회 환경에 따라 점차 더 확대되고, 부정적으로 변화하고 있는 것으로 확인되었다.

Students' Knowledge, Acceptance of Theory of Evolution and Epistemology: Cross-sectional Study of Grade Level Differences

  • Kim, Sun Young
    • 과학교육연구지
    • /
    • 제40권1호
    • /
    • pp.1-16
    • /
    • 2016
  • The purpose of this study is to explore the variables of knowledge, acceptance of theory of evolution and epistemology that could be keys for teaching and learning the theory of evolution within school contexts, and to suggest instructional tips for teaching evolution in relation to the grade levels of education. This cross-sectional study examined the grade level differences (8th, 11th, and preservice teachers) of four variables: evolutionary knowledge; acceptance of theory of evolution; and both domain-specific epistemology (nature of science in relation to evolution) and context-specific epistemology (scientific epistemological views) and their relationships. This study, then, built conceptual models of each grade level students' acceptance of theory of evolution among the factors of evolutionary knowledge and epistemology (both domain-specific and context-specific). The results showed that the scores of evolutionary knowledge, evolution in relation to NOS, and scientific epistemology increased as the grade levels of education go up(p<.05) except the scores of acceptance of theory of evolution(p>.05). In addition, the 8th graders' and the 11th graders' acceptance of evolutionary theory was most explained by 'evolution in relation to NOS', while the preservice teachers' acceptance of evolutionary theory was most explained by evolutionary knowledge. Interestingly, 'scientific epistemological views' were only included for the 8th graders, while evolutionary knowledge and 'evolution in relation to NOS' (context-specific epistemology) were included in explaining all the level of students' acceptance of evolutionary theory. This study implicated that when teaching and learning of the theory of evolution in school contexts, knowledge, acceptance of evolutionary theory and epistemology could be considered appropriately for the different grade levels of students.

  • PDF

Description of eight new mitochondrial genomes for the genus Neoarius and phylogenetic considerations for the family Ariidae (Siluriformes)

  • Luiz Guilherme Pereira Pimentel;Iuri Batista da Silva;Igor Henrique Rodrigues-Oliveira;Rubens Pasa;Fabiano Bezerra Menegidio;Karine Frehner Kavalco
    • Genomics & Informatics
    • /
    • 제21권4호
    • /
    • pp.51.1-51.5
    • /
    • 2023
  • The genus Neoarius, known as marine catfish, is a group of the family Ariidae, composed of 10 species found in Oceania. None of the species in this genus have their mitochondrial genome described, which is highly valuable in phylogenetic and molecular evolution studies. For the present work, eight species from the Neoarius genus were selected: Neoarius utarus, Neoarius midgleyi, Neoarius graeffei, Neoarius leptaspis, Neoarius berenyi, Neoarius paucus, Neoarius pectoralis, and Neoarius aff. graeffei. DNA sequences of the eight species were obtained through the NCBI Sequence Read Archive (SRA) database, and the mitochondrial genomes were assembled using the NOVOplasty tool on the Galaxy platform, subsequently annotated with the MitoAnnotator tool. We then utilized the protein-coding genes from the mitogenomes to estimate the phylogenetic relationships within the group, including seven additional mitogenomes available in the NCBI. In all species, the mitochondrial genomes presented 13 protein-coding genes, 2 rRNA genes, 22 tRNA genes, and 1 D-loop.

Characterization of six new complete mitochondrial genomes of Chiasmodontidae (Scombriformes, Percomorpha) and considerations about the phylogenetic relationships of the family

  • Igor Henrique Rodrigues-Oliveira;Rubens Pasa;Fabiano Bezerra Menegidio;Karine Frehner Kavalco
    • Genomics & Informatics
    • /
    • 제21권1호
    • /
    • pp.10.1-10.6
    • /
    • 2023
  • The fishes of the Chiasmodontidae family, known as swallower fishes, are species adapted to live in deep seas. Several studies have shown the proximity of this family to Tetragonuridae and Amarsipidae. However, the phylogenetic position of this clade related to other Pelagiaria groups remains uncertain even when phylogenomic studies are employed. Since the low number of published mitogenomes, our study aimed to assemble six new mitochondrial genomes of Chiasmodontidae from database libraries to expand the discussion regarding the phylogeny of this group within Scombriformes. As expected, the composition and organization of mitogenomes were stable among the analyzed species, although we detected repetitive sequences in the D-loop of species of the genus Kali not seen in Chiasmodon, Dysalotus, and Pseudoscopelus. Our phylogeny incorporating 51 mitogenomes from several families of Scombriformes, including nine chiasmodontids, recovered interfamilial relationships well established in previous studies, including a clade containing Chiasmodontidae, Amarsipidae, and Tetragonuridae. However, phylogenetic relationships between larger clades remain unclear, with disagreements between different phylogenomic studies. We argue that such inconsistencies are not only due to biases and limitations in the data but mainly to complex biological events in the adaptive irradiation of Scombriformes after the Cretaceous-Paleogene extinction event.

Model development in freshwater ecology with a case study using evolutionary computation

  • Kim, Dong-Kyun;Jeong, Kwang-Seuk;McKay, Robert Ian (Bob);Chon, Tae-Soo;Kim, Hyun-Woo;Joo, Gea-Jae
    • Journal of Ecology and Environment
    • /
    • 제33권4호
    • /
    • pp.275-288
    • /
    • 2010
  • Ecological modeling faces some unique problems in dealing with complex environment-organism relationships, making it one of the toughest domains that might be encountered by a modeler. Newer technologies and ecosystem modeling paradigms have recently been proposed, all as part of a broader effort to reduce the uncertainty in models arising from qualitative and quantitative imperfections in the ecological data. In this paper, evolutionary computation modeling approaches are introduced and proposed as useful modeling tools for ecosystems. The results of our case study support the applicability of an algal predictive model constructed via genetic programming. In conclusion, we propose that evolutionary computation may constitute a powerful tool for the modeling of highly complex objects, such as river ecosystems.

The Limit of Gene-Culture Co-evolutionary Theory

  • Lee, Min-seop;Jang, Dayk
    • 인지과학
    • /
    • 제28권3호
    • /
    • pp.173-191
    • /
    • 2017
  • The theories of cultural evolution hold subtly or clearly different stances about definition of culture, pattern of cultural evolution, biases that affect cultural evolution, and relationship between culture and organism. However, the cultural evolution theories have a common problem to solve: As the evolutionary theory of life tries to explain the early steps and the origin of life, the cultural evolution theories also must explain the early steps of the cultural evolution and the role of the human capability that makes cultural evolution possible. Therefore, explanations of the human's unique traits including the cultural ability are related to determine which one is the most plausible among many cultural evolution theories. Theories that tried to explain human uniqueness commonly depict the coevolution of gene (organism) and culture. We will explicitly call the niche construction theory and the dual inheritance theory the 'gene-culture co-evolutionary theory'. In these theories, the most important concept is the 'concept of positive feedback'. In this paper, we distinguish between core positive feedback and marginal positive feedback, according to whether the trait that the concept of positive feedback explains is the trait of human uniqueness. Both types of positive feedback effectively explain the generality of human uniqueness and the diversity of human traits driven by cultural groups. However, this positive feedback requires an end, in contrast to negative feedback which can be continued in order to maintain homeostasis. We argue that the co-evolutionary process in the gene-culture co-evolutionary theories include only the positive feedback, not covering the cultural evolution after the positive feedback. This thesis strives to define the coevolution concept more comprehensively by suggesting the potential relationships between gene and culture after the positive feedback.