Research advances in the Physiological and Molecular Mechanisms of Chalkiness Formation in Rice

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Online published: 2015-07-20

Abstract

Chalkiness is the opaque portion of rice endosperm, and high chalky rice rate has been one of the main obstacles for japonica rice production in southern China. Recent studies showed that only three QTLs for grain chalkiness were fine mapped and cloned, and 16 genes were identified with chalkiness occurrence, which take part in the biogenesis or degradation of starch and protein. However, the physiological and molecular mechanisms underlying chalkiness formation are still poorly understood, that are limited by experimental materials and techniques, and due to complex traits of chalkiness be controlled by genotype and environment. Further studies are essential by using typical materials and system biology approach to investigate the carbon-nitrogen metabolism of developing grain in rice. A deep understanding of physiological mechanism in chalkiness formation would be of significance in both rice improvement and cultivation practices to reduce chalky rice rate of japonica rice production in southern China.

Cite this article

LIN Zhao-Miao-1, ZHENG De-Yi-1, ZHANG Xin-Cheng-1, LIU Zheng-Hui-1 2*, WANG Shao-Hua-1, DING Yan-Feng-1 2 . Research advances in the Physiological and Molecular Mechanisms of Chalkiness Formation in Rice[J]. China Rice, 2015 , 21(4) : 14 -19 . DOI: 10.3969/j.issn.1006-8082.2015.04.003

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