Understanding the regulation of cereal grain filling: The way forward

Author:

Ma Bin1ORCID,Zhang Lin23ORCID,He Zuhua1ORCID

Affiliation:

1. National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology & Ecology Chinese Academy of Sciences Shanghai 200032 China

2. Joint International Research Laboratory of Agriculture and Agri‐Product Safety of the Ministry of Education Yangzhou University Yangzhou 225009 China

3. Jiangsu Co‐Innovation Center for Modern Production Technology of Grain Crops Yangzhou University Yangzhou 225009 China

Abstract

AbstractDuring grain filling, starch and other nutrients accumulate in the endosperm; this directly determines grain yield and grain quality in crops such as rice (Oryza sativa), maize (Zea mays), and wheat (Triticum aestivum). Grain filling is a complex trait affected by both intrinsic and environmental factors, making it difficult to explore the underlying genetics, molecular regulation, and the application of these genes for breeding. With the development of powerful genetic and molecular techniques, much has been learned about the genes and molecular networks related to grain filling over the past decades. In this review, we highlight the key factors affecting grain filling, including both biological and abiotic factors. We then summarize the key genes controlling grain filling and their roles in this event, including regulators of sugar translocation and starch biosynthesis, phytohormone‐related regulators, and other factors. Finally, we discuss how the current knowledge of valuable grain filling genes could be integrated with strategies for breeding cereal varieties with improved grain yield and quality.

Publisher

Wiley

Subject

Plant Science,General Biochemistry, Genetics and Molecular Biology,Biochemistry

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