ARS | Publication request: REGISTRRATION OF AN INDUCED SEMIDWARF MUTANT OF RICE

Submitted to: Crop Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: June 30, 2006
Publication Date: September 30, 2006
Citation: Rutger, J.N., Bryant, R.J. 2006. Registration of an induced semidwarf mutant of rice. Crop Science. 46:2340.

Interpretive Summary: This paper reports the finding a a new recessively inherited gene for semidwarfism, in the long grain background of the rice cultivar Drew. The new gene is different from the semidwarfing gene in present worldwide use, sd1, and thus provides an alternative source should it be needed.

Technical Abstract: A mutant for semidwarfism was induced in the long grain Drew. The mutant, designated DR1, was 27 cm shorter than its parent and 7330 compared to 8060 kg/ha for its parent. Grain dimensions and amylose content were similar to the parent. The new recessive mutant was nonallic to sd1, the worldwide semidwarfing source. Thus it provides genetic diversity for semidwarfism should this ever be needed.