Study on the Chalkiness Character of Giant Embryo Rice and Observation on Its Microstructure in Grains

Bo Peng, Kun He, Kun Xu, Dong-Ying Tang, Juan Peng, Xiao-Hua Song, Xia-Yu Tian, Yan-Fang Sun, Rui-Hua Pang, Meng-Yang Zheng, Hui-Long Li, Gui-Ying Guo, Xin-Hua Huang, Quan-Xiu Wang, Wei Zhou and Hong-Yu Yuan

Journal of Agricultural Science, 2024, vol. 12, issue 8, 171

Abstract: Grain chalkiness greatly affects the grain appearance and milling, eating, cooking, and nutritional qualities, thus it is one of the most important traits of grain qualities. Based on the study of chalkiness characters in endosperm of different giant embryo rice, the relationship between the differences of chalkiness characters in endosperm of different giant embryo rice and the morphological structure, arrangement and development of starch granules in endosperm was clarified, which will lay a solid foundation for further revealing the formation mechanism of chalkiness characters in giant embryo rice and cultivating excellent new varieties of giant embryo rice. In this study, the chalkiness of endosperm (including chalkiness rate, chalkiness degree and chalkiness area) of 16 different rice varieties were investigated and analyzed. The results showed that the chalkiness of endosperm was closely related to the morphological structure and arrangement of starch granules in endosperm cells of different kinds of giant embryo rice, and there were significant differences between the chalkiness of different parts of the same giant embryo rice and the morphological structure and arrangement of starch granules in endosperm cells. Therefore, the results of this study will provide important information for the improvement of quality characters and the breeding of new rice varieties.

Date: 2024
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