Incomplete Concerted Evolution of nrDNA ITS in Cornus subg. Syncarpea (Cornaceae) Intra-genomic Polymorphism in the nrDNA ITS Sequence of Camellia reticulata Intragenomic Polymorphism of the Internal Transcribed Spacer Region of Ribosomal DNA in Camellia hongkongensis (Theaceae) and Species Identification Research on nrDNA ITS Pseudogenes in Plants Correlation between AhFAD2 Polymorphism and Oleic Acid/ Linoleic Acid (O/L) Ratio in Peanut Seeds Effect of ITS Pseudogene on the Phylogenetic Study of Quercus ( Fagaceae) and Its Revelation on the Plant Molecular Phylogenetics Amplification and Sequence Characterization of ITS in Camellia Research Progress of Plant Molecular Phylogenetic Analyses Based on DNA Sequence Data—A Case Review in Rosaceae Molecular Cloning of A Calmodulin Gene and Identification of Its Pseudogene in Catharanthus roseus