Dissertation > Excellent graduate degree dissertation topics show

Generalized Polygonum (Polygonum s.lat.) And its related taxa phylogenetic and geographic distribution

Author: ZhaoDaPeng
Tutor: HouYuanTong
School: Qufu Normal University
Course: Conservation and Utilization of Wild Fauna and Flora
Keywords: China Generalized Polygonum Numerical Analysis Cladistic analysis ITS trnL-F rbcL Phylogenetic Geographic distribution
CLC: Q948.2
Type: Master's thesis
Year: 2011
Downloads: 48
Quote: 0
Read: Download Dissertation

Abstract


Wild populations of investigation and specimen collection based on the numerical taxonomy, cladistics and molecular phylogenetics methods, China generalized Polygonum genus Polygonum s. Lat and its related taxa phylogenetic studies and in geographic distribution law. The main findings are as follows: 1. Numerical analysis to choose generalized Polygonum and its related groups of 70 kinds and varieties for the classification of arithmetic units, select the 99 traits, numerical analysis using UPGMA method. The results show that the results based on the same criteria and methods, a different number of operational taxonomic units are not the same, the relationship between the location of some groups and groups always remain the same, and some groups changed, and a change in the groups It is the history of taxonomists controversial; Polygonum within each group should be more natural taxa, more obvious differences between the groups, support generalized Iceland Polygonum genus Koenigia s lat establishment; the Spring Polygonum sect. Persicria, the thorn Polygonum sect. Echinocaulon gold wire grass is Antenoron, the head like Polygonum group the sect. Cephalophilon and generalized Iceland Polygonum has high similarity; Polygonum sect. Bistorta sect of God Shengxuening. Aconogonon, buckwheat genus Fagopyrum and Polygonum genus Fallopia high similarity; the Polygonum aviculare groups sect. Polygonum and red medicine the sub genus Pteroxygonum independently as a. The results support the generalized Polygonum and line groups, it is necessary to be divided into more natural groups. The branch analysis Rumex's sorrel Rumex acetosa outgroup maximum parsimony generalized Polygonum and its related groups 45 kinds and varieties 49 morphological traits preliminary analysis of the branch. The results show that the branching tree based on morphological traits and characterization of the tree and not a good consistency, but still support spring Polygonum group, have a close genetic relationship between the the thorn Polygonum section heads Polygonum group and the gold wire genus the Polygonum genus and Polygonum cuspidatum genus the Reynoutria has a closer relationship, the build articles group, Polygonum group thorns Polygonum group are more natural taxa. Molecular phylogeny to Triplaris Triplaris americana as an outgroup, select Polygonaceae Polygonaceae 65 species chloroplast trnL-F sequence, 64 kinds of chloroplast rbcL sequence, and 68 kinds of nuclear ribosomal ITS sequences of these three fragments of a single data matrix and joint data matrix, respectively phylogenetic tree was constructed using the NJ method, MP law and BI law. The results show that: (1) Spring Polygonum group, thorn Polygonum group, the gold wire genus and head shape Polygonum section has a very close kinship, Polygonum section of the head like a sister group of the above groups; (2) boxing parameter group, God blood Ning group and generalized Iceland Polygonum has a very close kinship, Polygonum group Polygonum genus as the sister group of taxa above; (3) (except butter head Fallopia denticulata), Polygonum genus Polygonum aviculare group, wood Polygonum genus Atraphaxis and the Siberia God Shengxuening Polygonum sibiricum has close kinship, Siberia God Shengxuening the sister group of taxa above. Processing Polygonaceae phylogenetic relationships are as follows (the dotted line represents the relationship between the branch taxa in this article still can not solve): 4. Geographical distribution through years of field trips and statistical analysis of the Polygonaceae family Polygoneae plant in China the geographical distribution of the in-depth study. The results show that the distribution of such group in China with some regularity. Was a growing trend in the horizontal distribution of the number of species from the northeast to the southwest, six high-density distribution, concentrated along the mountain range - Qinba Mountains distribution. Other genera or groups outside addition Shouwu country widely distributed, has its main distribution area. On the vertical distribution of the entire of Polygoneae plants are almost all located at an altitude of 5,000 meters below. 1000-3000 meters in altitude, Polygoneae plants are widely distributed, Iceland Polygonum Polygonum group head like Polygonum group year-type and the blood of God Ning group plants are mainly located at an altitude of 3,000 meters above the Polygonum aviculare group spring Polygonum groups, stabbed Polygonum section Polygonum genus Polygonum cuspidatum case the gold wire grass genera and buckwheat are mainly distributed in the 1,000 meters below sea level.

Related Dissertations

  1. Research of the Marginalization Phenomenon of Calligraphy Art in the Period of Republic of China,J292.27
  2. Pattern Classification of Combustion Modes in Scramjet,V235
  3. The Study on the Location and Level of Grain Market in Peking during Republican China Period,K291
  4. Inheritance of secondary ideological and political education and the Confucian tradition of thinking,G633.2
  5. Comparison of Genetic Diversity of Total Planktonic Bacteria and Active Planktonic Bacteria in Huguangyan Maar Lake in Summer,Q938
  6. A Research on New China’s Cultural Diplomacy in Africa,D822
  7. On Civilian-run Colleges and Universities Issue and Its Internal Management System to Improve,G647
  8. Study on Phylogenetic Diversity and Bioactivity of Symbiotic Fungi of Coral,R284
  9. Study on Mental Health and It’s Impact Factors of International Students in China,B849
  10. A Study on the Structure of Ethnic Costumes in North of China,TS941.1
  11. The Development Relations of China and India Textile Trade of After-Quota Era,F752.7
  12. Philosophical Perspective of Theconstruction of Ruling Culture of the Communist Party of China,D25
  13. Study on Religious Policy Since the Founding of New China,D635
  14. Establishment of the Molecular Identifying System of Curvualria and Application in Difficult Species,Q949.32
  15. Isolation and Identification of Infectious Bronchitis Virus in Henan and the Full Genome Sequence Analysis of Isolated Strains HN104 and HN091,S852.65
  16. Wildlife Conservation in China Legal Systems of,D922.68
  17. Analysis on Registration System of Forest Right,D923.2
  18. Communication Concept of Contemporary Chinese Marxist Philosophy Popular Research,B27
  19. The Way of Reforming and Perfecting CPC’s Ruling Style,D25
  20. The Chinese Communist Party United Front Work in the new social class,D613
  21. Context of Globalization of Contemporary China’s Development Road,D616

CLC: > Biological Sciences > Botany > Plant ecology and biogeography > Plant geography,plant distribution ( Flora )
© 2012 www.DissertationTopic.Net  Mobile