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Genetic improvement of grain quality traits in indica inbred rice cultivars developed in South China during 1956-2020

文献类型： 外文期刊

作者： Zhou, Xin-Qiao 1 ; Chen, Da-Gang 1 ; Guo, Jie 1 ; Chen, Ping-Li 1 ; Li, Li-Jun 1 ; Chen, Ke 1 ; Chen, You-Ding 1 ; Liu, Chuan-Guang 1 ; Zhang, Ze-Min 2 ;

作者机构： 1.Guangdong Acad Agr Sci, Guangdong Key Lab New Technol Rice Breeding, Guangdong Rice Engn Lab, Rice Res Inst, Guangzhou 510640, Peoples R China

2.South China Agr Univ, Guangdong Prov Key Lab Plant Mol Breeding, Guangzhou 510642, Peoples R China

关键词： Rice; Cultivar domestication; Grain shape; Grain quality

期刊名称：EUPHYTICA （ 影响因子：2.185； 五年影响因子：2.387 ）

ISSN： 0014-2336

年卷期： 2022 年 218 卷 1 期

页码：

收录情况： SCI

摘要： Rice is the most staple food consuming in China. During the past six decades, a large number of indica inbred rice cultivars have been developed. However, seldom studies have focused on evaluating the dynamic changes of grain quality improvement among the major cultivars. Our study evaluated the genetic improvement of 12 quality traits in indica inbred rice cultivars developed in rice breeding programs in South China during 1956-2020. The results indicated that significant improvement had been gained for the appearance quality, cooking and eating quality in the breeding program since the 1990s, while slight genetic improvement was attained before 1990. Among all the 12 traits, MGL (Milled Grain Length), LWR (Length Rate Ratio), GC (Gel Consistency), and ASV (Alkali Spreading Value) were significantly increased among these different cultivars; MGW (Milled Grain Width), CGR (Chalky Grain Rate), CA (Chalkiness Area), and AC (Amylase Content) showed a tremendously decreased trend from last thirty years. However, the other four traits, such as BRR (Brown Rice Rate), MRR (Milled Rice Rate), HMRR (Head Milled Rice Rate), and PC (Protein Content) showed little improvement during the breeding processes in these cultivars. The results also suggested that selecting a slender grain shape would be beneficial for breeding high quality indica rice. We also discussed that improving milling quality, especially HMRR of the high-quality cultivars and nutrition quality for special consumer groups as an meaningful direction for rice breeding.

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