A single observation or measurement. The measurable differences among varieties grown in a particular area or the genetic diversity among varieties of the rice plant. The process of improving varieties to meet the standards required. The procedure for releasing varieties from breeding stations to farmers for commercial cultivation. It differs from a breeding line in that it has been named and made commercially available to farmers.
Variety is synonymous with cultivar.
The classification of accessions into groups based mainly on the morphological features of the adult rice plant and on grain appearance. A trial in which treatments are different in the varieties that are grown and all other factors are treated equally and in a uniform system. Pertaining to, or having vessels that convey, fluids. An organism that carries pathogens from one host to another. An insect that transmits a disease.