استفاده از صفات مرفولوژیک و فیزیولوژیک در آزمونهای تمایز، یکنواختی و پایداری(DUS) در ارقام برنج

In order to Protecting a new plant variety and granting breeder rights, a candidate variety must be examined with the existing known varieties based on morphological and physiological traits to having three criteria for distinctness, uniformity and stability (DUS) and then it is added to the national list. Identification of common rice varieties in order to provide the national list and to complete of reference collection is very important. In this regard, registration and identification of existing rice cultivars were conducted using morphological and physiological traits according to the national guideline. In this respect, tests for Distinctness, uniformity and stability were applied for 23 genotypes were sown using a randomized complete block design with three replications for the years 2010-2012 at rice research institute (Rasht). Fifty nine morphological and physiological traits were observed visually or measured for all varieties observed in the test. At first by using seed aroma data all varieties grouped into three categories, and then All Varieties within each group based on qualitative Characteristics were distinct and separated from each other. The variety distinctness was evaluated using analysis of variance and means comparisons. Qualitative and semi qualitative traits differentiated 23 varieties. Analysis of variance of 6 quantitative traits revealed the significant difference (LSD) between all the cultivars at %1 of probability level.