The cultivated rice (Oryza sativa L.) was domesticated from annual wild rice progenitor species Oryza nivara Sharma et Shastry in Gondwanaland. During domestication many of genes present in ancestral species were mutated/lost. Seed shattering trait is one of these traits, which had been lost in cultivated rice. Seed shattering 1 (SHA1) is a dominant gene located on chromosome 4 of rice genome and is responsible for seed shattering in rice. A g237t mutation in this gene had caused non-shattering phenotype in cultivated rice.