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Breeding for three-line japonica hybrid rice combinations with high resistant starch content using molecular marker-assisted selection

文献类型： 外文期刊

作者： Yang, Ruifang 1 ; Piao, Zhongze 1 ; Wan, Changzhao 1 ; Lee, Gangseob 2 ; Ruan, Xinmin 3 ; Bai, Jianjiang 1 ;

作者机构： 1.Shanghai Acad Agr Sci, Crop Breeding & Cultivat Res Inst, 1000 Jinqi Rd, Shanghai 201403, Peoples R China

2.Natl Acad Agr Sci South Korea, Suwon 441857, South Korea

3.Anhui Acad Agr Sci, Rice Res Inst, Hefei, Anhui, Peoples R China

关键词： hybrid rice; Jiangtangdao 1; molecular marker-assisted selection; resistant starch; sbe3-rs

期刊名称：BREEDING SCIENCE （ 影响因子：2.086； 五年影响因子：2.632 ）

ISSN： 1344-7610

年卷期： 2020 年 70 卷 3 期

页码：

收录情况： SCI

摘要： Resistant starch (RS) is beneficial for human health, and especially for diabetics. Considering the high cost and low productivity of the Jiangtangdao 1 rice variety with high RS content, breeding high RS rice varieties exhibiting high productivity is essential. A molecular marker-assisted selection strategy was applied to increase RS content in a three-line hybrid rice variety. The functional rice variety Jiangtangdao 1, which contains sbe3-rs (on chr2) that controls the RS content, was used as the high RS content donor parent. Subsequently, male sterile maintainer and restorer lines containing homozygous sbe3-rs were bred using molecular marker-assisted selection combined with traditional breeding methods. The male sterile line was crossed with the restorer lines to identify the optimal hybrid combination with a high RS content. We obtained four combinations for which the yields were >50% higher than those of the control Jiangtangdao 1. In addition, there was no significant difference in the RS content between the combinations and Jiangtangdao 1. The hybrid rice plants with high RS content exhibited favorable agronomic traits and therefore have broad prospects for commercial application.

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