Submitted to: American Society of Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 8/15/2006
Publication Date: 11/12/2006
Citation: Agrama, H., Eizenga, G.C., Bryant, R.J., Neves, P.F., Mackill, D.J. 2006. Genetic analysis of agronomic and grain quality traits in an Oryza sativa/Oryza nivara advanced backcross population [abstract]. American Society of Agronomy Abstracts. November 6-10, 2006, Indianapolis, IN. CDROM. Interpretive Summary:
Technical Abstract: Rice wild relatives are a potential source of genetic diversity for cultivated rice improvement. Approximately 175 BC2F3:4 M202 (Oryza sativa L.)/O. nivara Sharma & Shastry (IRGC 100195) advanced backcross progeny were genotyped with 150 SSR (single sequence repeat) markers, and phenotyped for five agronomic and four grain quality traits. Quantitative trait loci (QTL) controlling these traits were identified using the software QTLNetwork. The SSR markers were distributed throughout the rice genome and mapped to chromosome location using the software JoinMap4. DNA markers, that were recently developed to identify grain quality traits in U.S. rice cultivars, were used to identify unique quality alleles contributed by the O. nivara parent. The O. nivara parent also contributed some positive alleles for improving agronomic traits thus; selected progeny will be excellent parents for improving U.S. rice varieties.