Selection and Classification for Amaryllis DUS Testing Quantitative Traits Development Status of New Plant Variety Protection and DUS Testing Classification Analysis for Italian Ryegrass DUS Testing Quantitative Traits Genetic Diversity Analysis of Japonica Rice Landraces (Oryza sativa L.) from Shanghai Based on DUS Testing Classification for Gerbera DUS Testing Quantitative Traits and Diversity Analysis of Mrphological Characteristic