Guideline for the tests of DUS for new varieties of genus Robinia

Guideline for the tests of distinctness, uniformity and stability (DUS) for new varieties of genus Robinia was developed for standardizing the examination of DUS, performing better the international convention for the protection of new varieties of plants and in line with international practice. The guideline follows the general introduction to examination of DUS for UPOV and the national standard of test guideline for DUS in China. By field survey and fixedpoint observation of many years, the author did comprehensive and painstaking research on morphology characteristics and growing characteristics of genus Robinia, including main species, variants and cultivars. Thirtyone testing characteristics were described for the table of characteristics; the 110 states of expression for characteristics were given; the example varieties were provided for 94 states of expressions; each state of expression was allocated to the corresponding numerical note; the methods of examination were determined for each characteristic.