Identification method for rice varieties
Identification of rice varieties usually uses field identification and indoor identification combined with field surveys. (a) The main contents of the field survey field identification are purity, ripening period and main characteristics. The intrinsic characteristics of rice varieties (combinations) promoted and applied in production should be characterized by uniform and consistent characteristics in the field. Based on the above characteristics, different rice varieties can be identified and their purity can be identified. The purity of a variety is generally expressed by the number of plants (or the number of indoor test seeds) having the inherent characteristics of the species in the total number of investigated plants (or the total number of seeds in the indoor test). Field surveys can be conducted at five random sampling surveys at random and at the center of the field (excluding sidewalks). In addition to investigating the purity according to the characteristics of the varieties, the field survey can also check the purity according to the ripening period. The variety (combination) applied in production has a relatively stable growth period in specific regions, and the growth period of varieties (combinations) varies from year to year. Changes, but not much change, that is, during the normal sowing period, mature early-season rice varieties in certain regions will not become mature rice varieties in autumn or late-season mature varieties. (B) indoor identification indoor identification including seed identification and physical and chemical detection methods and quality identification method. Seed identification method can be used to identify different varieties based on the length of seed grains, the color of axillary tips, the presence or absence of awns, the weight of a thousand seeds, and the number of axillary hairs of different varieties. For example, the indica rice varieties have long, dense and difficult threshing, and the grain is short. Wide and thick, nearly circular cross-section; indica rice varieties short and thin, scattered enamel, easy to threshing, slightly flat rice. China Agricultural Network Editor