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DEVELOPMENT AND CHARACTER OBSERVATION OF AUTOTETRAPLOID POLYEMBRYONIC MUTANT RICE INDUCED BY ION BEAM IMPLANTATIOON Inheritance of Aroma in Autotetraploid and Diploid Rices Rice Tetraploidy and Its Effect on Agronomic Traits and Nutritional Constituents Analysis on Physiological Characteristics and AFLP of Diploid and Autotetraploid of Stevia Rebaudiana Bertoni Study on Isolated Microspore Culture and Embryo Developmental Pathway in Autotetraploid Broccoli (Brassica oleracea var.italica) Molecular and Cytological analysis of Meiosis in Autotetraploid Arabidopsis thaliana Meiotic Observations of Pollen Mother Cells in Diploid and Autotetraploid Ziziphus jujuba Mill.‘Lajiaozao’ Biological and Physiological Features of Male-sterile and Maintenance Lines of Autotetraploid Sorghum Analysis of the Level and Pattern of Genomic DNA and Methylation in Diploid and Autotetraploid of Atractylodes lancea (Thunb.) DC. by MSAP Anther Development of Pol CMS and Its Corresponding Maintainer Line in Autotetraploid Non-Heading Chinese Cabbage Meiosis of Pollen Mother Cells in Autotetraploid Petunia ANALYSIS ON DNA METHYLATION DIVERSITY OF DIPLOID AND TETRAPLOID OF WATERMELON（Citrullus lanatus） COMPARISON BETWEEN TETRAPLOID TURNIP (Brassica rapa) AND ITS DIPLOID PROGENITOR OF DNA METHYLATION UNDER CADMIUM STRESS AUTOTETRAPLOID INDUCTION OF Paulownia elongata WITH COLCHIONE Photoautotrophic Growth of Tube-plantlets Derived from Elite Autotetraploid Rice Individuals of Hybrid Progenies under Open Condition Obtaining and Identification of Tetraploid Brassica nigra Obtaining and Identification of Tetraploid Brassica nigra Comparative study on photosynthetic characteristics of different ploidy Rhodiola sachalinensis germplasm Progress of Variations in Floral Organs and Seeds of Autotetraploid Plants New variety breeding of seedless Ningxia wolfberry Ovule Abortion and Its Mechanism for Tetraploid Robinia pseudoacacia Selection of Primary Trisomics from Anther Culture of Autotetraploid Rice (Oryza sativa L.) Several problems on autopolyploid breeding in plants Induction of Autotetraploid Non-heading Chinese Cabbage with High-quality and Heat-tolerance by Colchicine Variation and Vitality of Seed Embryos from Tetraploid Robinia pseudoacacia Tissue culture and induction of autotetraploid of Pueraria thomsonii MORPHOLOGICAL AND STRUCTURAL VARIATION OF SEEDS FROM TETRAPLOID Robinia pseudoacacia Regeneration of Autotetraploid Broccoli in Vitro Culture and Identification of the Ploidy Cytological Observation on Microsporogenesis in Inter-subspecific Hybrids of Rice with Different Ploidy Level Meiotic Observations of Pollen Mother Cells in Diploid and Autotetraploid Ziziphus jujuba Mill.‘Lajiaozao’ Chromosome Pairing Behavior and Reproduction in the Hybrid Developed by the Interaction of Different Pollen Sterile Genes in Autotetraploid Rice Characteristics of Micro-structures and Chlorophyll Fluorescence Parameters of Diploid and Autotetraploid ‘Hanfu’ Apple Leaves Male Gametophyte Development in Autotetraploid Radish Structure and Fertilization of Embryo Sac in Intersubspecific Hybrids of Autotetraploid Rice Genetic Diversity of Autotetraploid Alfalfa with Different Salt-tolerant Trait Based on SSR Marker Analysis Establishment of an Autotetraploid Rice Anther Clone with High Frequency and Long Term Plant Regeneration In vitro Induction and Identification of Autotetraploid Stevia rebaudiana Bertoni Morphological and Developmental Characters of Autotetraploid from Wild Diploid Dactylis Glomerata in Yunnan Province(A Brief Recearch Report) Changes in the Pattern of Organization of Microtubules during Meiosis in Pollen Mother Cell (PMC) of Autotetraploid Rice In vitro autotetraploid induction and analysis on DNA methylation diversity of Platycodon grandiflorum Scanning Electron Microscope Observation on Twinembryo Seedling Rice Seed Inducing Autotetraploid Pea with Colchicine and DMSO Meiosis of Pollen Mother Cells of Autotetraploid Carrot Regeneration of Autotetraploid Broccoli in Vitro Culture and Identification of the Ploidy Changes of Endogenous Hormones in Adventitious Root Forma tion in Soft-wood Cuttings of Autotetraplo id Grape Muscat Hamburg Changes of Endogenous Hormones in Adventitious Root Forma tion in Soft-wood Cuttings of Autotetraplo id Grape Muscat Hamburg Studies on Polyploid Breeding of Isatis indigotica Fort. Induction of Autotetraploid Cucumbers by Unpollinated Ovary Culture and Their Characterization Meiosis of Pollen Mother Cells of Autotetraploid Carrot Induction of Autotetraploid Cucumbers by Unpollinated Ovary Culture and Their Characterization Phenotypic Observation and Analysis of Inflorescence Variation of Autotetraploid Robinia pseudoacacia Analysis of Diploid and Its Autotetraploid Paulownia tomentosa×P. fortunei with AFLP and MSAP Diploid and Tetraploid Distribution of Allium wallichii Kunth(Ailiaceae) in the Yunnan-Guizhou Plateau Studies on the Karyotype of 5 Samples of Allium Sect. Bromatorrhiza Ekberg Analysis of Genetic Variation and DNA Methylation Alteration in Autotetraploid and Diploid Dendrobium officinale In vitro Induction and Identification of Autotetraploid of Atractylodes lancea (Thunb.) DC.