Abstract
Background: Rice quality is one of the main targets for rice breeding, and is a complex trait involving grain appearance, milling, cooking, eating and nutritional quality. For a long time, rice breeding is facing the imbalance of yield, quality, disease resistance and lodging.Result: Here, the grain quality characters (milling and appearance quality, cooking quality, starch RVA profile, and nutritional quality) of Yuenongsimiao (YNSM), a new indica rice variety with high yield, high quality and disease resistance, were performed. It showed that YNSM has excellent appearance and quality with low amylose content, long gel consistency, and had significant correlation with the HPU, CPV, SB, and CS. Moreover, 5 genes related to grain size (GS3, GS9, GW5, GW7, and GW8) and Wx gene were selected to detect the main quality genotype of YNSM. The results showed YNSM was a middle-long grains with relative high brown rice rate, white rice rate and whole white rice rate, and lower chalkiness. The results indicated the grain size and food quality of YNSM might related to gs3, gw7 and Wxb. This research also reported the quality characters of hybrid rice using YNSM as a restorer lines.Conclusions: The quality characters and genotype of grain quality gene analysis in YNSM may facilitate the breeding of new rice varieties achieving a balance between grain yield, resistance and quality.
The potentials and prospects of tidal swamp local brown rice as a nutrition source of iron and zinc and the parent of rice breeding
