Primary Study on Measuring the InternalTranscribed Spacer l Regions of rRNA Genein seeds of Gentiana dahurica A Modified Method of Amplifying the 5′-end cDNA Sequence Isolation and Characterization of RNaseH-LTR Sequences of Ty1-copia Like Retrotransposons in Oriental Persimmon (Diospyros kaki Thunb. ‘Luotian-tianshi‘) A Modified Method of Amplifying the 5′-end cDNA Sequence Isolation and Characterization of RNaseH-LTR Sequences of Ty1-copia Like Retrotransposons in Oriental Persimmon (Diospyros kaki Thunb. ‘Luotian-tianshi‘)