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HEREDITAS ›› 2009, Vol. 31 ›› Issue (6): 563-572.doi: 10.3724/SP.J.1005.2009.00563

• 综述 • Previous Articles     Next Articles

Current status and strategies for improvement of rice grain chalkiness

ZHOU Li-Jun1;JIANG Ling1;ZHAI Hu-Qu2;WAN Jian-Min1, 2   

  1. 1. State Key Laboratory of Crop Genetics and Germplasm Enhancement/Jiangsu Plant Gene Engineering Research Center, Nanjing Agri-cultural University, Nanjing 210095, China;
    2. Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China;
    3. Chinese Academy of Agricultural Sciences, Beijing, 100081 China
  • Received:2008-11-04 Revised:2009-01-28 Online:2009-06-10 Published:2009-06-10
  • Contact: WAN Jian-Min

Abstract: This paper reviews the current status of correlation between rice chalkiness and other rice quality characters, formative mechanism, and classical and molecular genetics for rice chalkiness. The formation of rice chalkiness proves to be a complicated physiological process and tightly relate to “source-sink” of rice, dynamics of grain filing, biosynthesis and accumulation of starch in endosperm. Rice chalkiness is a complicated quantitative trait, which is controlled by maternal effects, endosperm effects, and cytoplasmic effects. There are some stable quantitative trait loci (QTL) for rice chalkiness on many rice chromosomes. Of them, three genes controlling rice chalkiness, which have an impact on starch synthesis, starch metabolism, and fruit development, have been cloned. But the manipulative network and formative mechanisms of rice chalkiness remain unclear. At present in breeding practice, decrease of rice chalkiness has become one of the main aims in rice quality breeding, especially for indica rice. The direction of genetic research and improvement strategy of rice chalkiness in future were discussed in this review.