Rice milling quality

Abstract

Milling of rice plays a key role in determining rice quality and value. Milling quality is evaluated with three main parameters: brown rice recovery (BRR, the percentage of brown rice to rough rice), milled rice recovery (MRR, the percentage of milled rice to rough rice), and head rice recovery (HRR, the percentage of head rice to rough rice). Many factors may impact the milling quality of rice, such as genotypic difference among rice cultivars, environmental factors during rice growing, milling machinery (devices), and milling technologies. Rice milling quality is genetically controlled and could be improved by breeding. High head rice yield (HRY) is a high-priority objective for rice breeding programs. This chapter discusses the factors influencing milling quality of rice, genetic basis of milling quality, and breeding efforts towards high HRY rice improvement.