Study on the Homologous Sequences of copia-like Retrotransposons in a Twin-ovary Mutant of Rice Cloning and Analysis of Miniature Inverted Repeat Transposable Elements PhTourist 1 from Phyllostachys edulis Morphological and Anatomical Analyses of a Floral Organ Mutant in Rice Retrotransposons in the Genomes of Higher Plants