Defining the link between rice grain protein profiles and rice grain quality

Summary

The objective of this project is to determine the role of the protein component in the rice grain and how it affects the storage of the grain and ultimately its quality. Genetic control of the protein composition of the rice grain and its impact on rice quality is poorly understood. Up to 10% of the rice grain is protein. Variation in the protein composition during storage could account for 30% of rice quality parameters not explained by starch structure. Protein research has been largely overlooked in favour of understanding the starch components. Protein is significantly more complex then starch in its structure and functionality. Proteins are composed of 20 different amino acid building blocks which have very different chemical properties while starch is composed of only a single building block, glucose. The complexity of protein means it is likely to have an impact on grain quality out of proportion to its contribution to grain content. This project will produce a method which allows generation of a reproducible grain storage protein fingerprint. The extent to which protein composition affects storage and impacts on rice cooking plus eating quality will be determined by applying the protein fingerprinting method to a range of cultivars which differ in grain quality parameters.

Program

Rice

Research Organisation

Southern Cross University

Objective Summary

The objective of this project is to determine how the storage of proteins control rice grain quality. This project will provide the knowledge and tools which will allow the Australian rice industry to better manage existing varieties and breed varieties with higher grain quality. This project will develop a method which allows generation of a reproducible rice grain protein fingerprint in rice ready for storage. Once established, the fingerprinting method will be applied to improve our understanding of the link between, and management of nitrogen fertilizer, grain protein composition, grain quality and yield. Understanding how rice grain protein composition impacts on rice grain quality will help rice growers satisfy consumer need for grain quality while maximising yield through addition of nitrogenous (N) fertilizer. An outcome of this project will be the knowledge and tools which will allow the Australian rice industry to breed rice cultivars with higher grain quality. The project creates the capability for further research to explore the nutritional benefits of essential amino acids found within rice proteins in stored grain, the role of rice proteins as an ingredient in wheat based products, and others. This project will address the National Research Priorities of an Environmentally Sustainable Australia, Safeguarding Australia and Frontier Technologies for Building and Transforming Australian Industries and each of the underlying Rural Research Priorities. This will be achieved by using new and existing technology to improve productivity, profitability, sustainability, resilience and adding value to the rice industry and the Australian rural sector as a whole.

Project Code

PRJ-008768

Project Stage

Closed

Project Start Date

Sunday, September 15, 2013

Project Completion Date

Wednesday, May 31, 2017

Journal Articles From Project

Not Available

National Priority

An environmentally sustainable Australia

National Priority

Adoption of R&D

National Priority

RIC-Rice breeding - varieties and quality improvement

Contact

Related publications

12.07.17

Defining the link between rice grain protein profiles and rice grain quality