Dissertation > Excellent graduate degree dissertation topics show

Parimary Systematics of Anaphalis from China

Author: ZhangYanMei
Tutor: ZhuShiXin
School: Zhengzhou University
Course: Cell Biology
Keywords: Anaphalis morphology anatomy micro-morphology molecular systematics
CLC: Q948
Type: Master's thesis
Year: 2009
Downloads: 25
Quote: 0
Read: Download Dissertation

Abstract


Anaphalis DC. belongs to Gnaphalinae, Inuleae, Compositae. The circumscriptions between Anaphalis and related generas are unclear. The species numbers under the Anaphalis are larger and the relatioships of them are ambiguous. The Anaphalis is of unstable and variable characters, which make it one of the most problematic groups in Compositae. The origin of Anaphalis is also disputed. In this study, most taxa of Anaphalis were observed and experimented based on macro-morphological characteristics, anatomical structure, micro-morphological features and molecular systematics for the first time. The aim was to explore the useful characters and finally clarify the systematic relationship of taxa under Anaphalis.The results of macro-morphological characteristics, anatomical structure and micro-morphological features showed that different characteristics had different taxonomic value among various taxa of Anaphalis and supported the establishment of subgen. Gnaphaliops and subgen. Anaphalis and the establishment of sect. Anaphalis and sect. Margaripes under subgen. Anaphalis as in "Flora of China". But subgen. Gnaphaliops was not the original group of Anaphalis.In molecular systematics, the internal transcribed spacers (ITS) of three species of Anaphalis were sequenced and analysed combined with published 13 species of Anaphalis and related genera. The aim was to analyse the phylogenetic relationships of the taxa of Anaphalis and the relationship between Anaphalis and related genera. The result showed that the phylogenetic relationships of A. nepalensis and A. triplinervis which belong to sect. Margaripes formed a clade. A. Sinica of Ser. Sinicae and A. margaritacea of Ser. Margaripes formed a clade, with a 99% bootstrap value. A. aureo-punctata from Henan and Yunnan formed a clade, with a 100% bootstrap value. Anaphalis trinervis and A. subrigida from NesZealand formed a clade, distantly related to other taxa of Anaphalis and but near with Helichrysum. bellidioides and H. alpinum with a less than 50% bootstrap value. So the cladistic analysis supported the view of Helichrysum bellidioides should not be placed in Anaphalis and the view of Gnaphalium was more evolutionary than Anaphalis. The result showed that the result of molecular systematics was same with the results from morphology and could be taken as a classification evidence of Anaphalis. Finally, Anaphalis from China was systematically arranged based on observing a large number of specimens, analysing characters and experiment. Anaphalis from China was confirmed to have fifty-five species, twenty-eight varieties, two varieties were reduced to synonyms, and on the basis of the front work, key of Anaphalis was made. .

Related Dissertations

  1. Tongue Feature Extraction and Research of Fusion Classification,TP391.41
  2. The Properties of Laser Speckle Based on the Mathematical Morphology,O29
  3. Research on the Structure of Sports Anatomy Materials of P.E.Education in the Universities of China,G807.4
  4. Road extraction algorithm based on region segmentation of remote sensing image,TP751
  5. Research of Anomaly Detection Algorithms of Hyperspectral Imagery Based on Kernel Method,TP751
  6. Effects of Nitrogen Fertilizer on Morphological Development of Alfalfa Root,S541.9
  7. Theeffect of Environmental Factor on Rooting Culture of Paeonia Suffruticosa in Vitro,S685.11
  8. Studies on Leaf Epidermal and Pollen Micro-morphology and Geographical Distribution of the Genus Euonymus of Henan,Q944
  9. Sagitta Morephology, Distribution, Biology and Stock Assessment of Four Prlagic Species in the Mouth of Beibu Gulf,S932.4
  10. Technology of Blood Vessel Diameter Measurement Automatic Based on Digital Image Processing,R310
  11. The Evolvement of Quartzs and Phytoliths in Basalt-Derived Chronosequence Soils in Tropics Area of China,S153
  12. Study on the Morphology, Physiology and QTLS Mapping of a Dwarf Mutant Ari1327 from Cotton (Gossypium Hirsutum L.),S562
  13. Radiation Transfer Characteristics and Radiation Use Efficiency of Rice,S511
  14. Physiological Functional Identification of Rice Phosphate Transporter OsPT4,S511
  15. Studies on Aphid Resistance Identification, Resistance Related Mechanisms and LLA Gene Transformation of Cut Chrysanthemum,S682.11
  16. The Application of Ant Colony Algorithm in Meteorological Satellite Cloud Pictures Segmentation,TP391.41
  17. Effects of Mannose-oligosaccharide on Intestinal Morphology and Bacterial Community in Gastrointestinal Tract of Broiler Chickens,S831.5
  18. A Study of the Relationship between Ultrasound Images of Masicatory Muscle and Caraniofical Morphlogy of Young Males with Nomal Occlusion,R783.5
  19. Genotypic Variation for Root Morpha and Potassium Accumulation in Maize Inbred Lines under Potassium Stress Condition,S513
  20. Cationic Microemulsion-mediated Synthesis of MFI Zeolite,TQ424.25
  21. Influence of Various PH and the Treating Time on Mechanical Property and Surface Structure of Ni-ti Orthodontic Wire,R783.5

CLC: > Biological Sciences > Botany > Plant ecology and biogeography
© 2012 www.DissertationTopic.Net  Mobile