Research Report

Study of the Effect of the Tg1 Gene on Grain Quality in Rice  

Shenghai Ye , Rongrong Zhai , Jing Ye , Guofu Zhu , Yanting Lu , Xiaoming Zhang
Institute of Crop and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
Author    Correspondence author
Rice Genomics and Genetics, 2022, Vol. 13, No. 6   doi: 10.5376/rgg.2022.13.0006
Received: 06 Jul., 2022    Accepted: 20 Jul., 2022    Published: 29 Jul., 2022
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This article was first published in Molecular Plant Breeding in Chinese, and here was authorized to translate and publish the paper in English under the terms of Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Preferred citation for this article:

Ye S.H., Zhai R.R., Ye J., Zhu G.F., Lu Y.T., and Zhang X.M., 2022, Study of the effect of the Tg1 gene on grain quality in rice, Rice Genomics and Genetics, 13(6): 1-7 (doi:10.5376/rgg.2022.13.0006)


To explore the effect of twin-grain1 (tg1) gene on rice quality, a japonica twin-grain mutant Zhejing 22-tg1 was used as a donor to transfer the tg1 gene to a large-grain variety SLG. Grain filling rate, rice quality indices and starch granule morphology were compared among Zhejing22, Zhejing22-tg1, SLG and SLG-tg1. The effect of the tg1 on grain quality was analyzed. The new line SLG-tg1 showed increased grain filling rate and significantly improved grain quality including appearance quality, processing quality, cooking taste and nutritional quality. Scanning electron microscope (SEM) observation of starch granules showed that the starch granule structure of SLG-tg1 is much tighter than SLG with multi-sided shape, which meant its good grain quality. Therefore, this study demonstrated that transferring the tg1 gene could improve grain quality in rice and it provided a reference for breeding new high-quality rice varieties.

Rice; Twin-grain1 gene; Grain quality; Grain filling rate; Starch granule structure
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