Effects of Genetic Background and Environmental Conditions on Amylopectin Chain-Length Distribution in a Recombinant Inbred Line of an Inter-subspecies Rice Cross

文献类型： 外文期刊

第一作者： Xu, Ximing

作者： Xu, Ximing;Li, Xiukun;Li, Zhibin;Wu, Lian;Xu, Zhengjin;Xu, Quan;Li, Xiukun;Li, Yang;Chen, Kai;Fa, Yun

作者机构：

关键词： rice; amylopectin chain-length distribution; climate factor; genetic background; DEP1

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：5.279； 五年影响因子：5.269 ）

ISSN： 0021-8561

年卷期： 2020 年 68 卷 28 期

页码：

收录情况： SCI

摘要： Amylopectin is an essential starch property, and the chain-length distribution of amylopectin (APCLD) is closely associated with the eating and cooking quality of rice. In this study, a series of recombinant inbred lines derived from an indica/ japonica cross were planted in four areas with distinct ecological conditions (LN, SC, JS, and GD), and the relationship among APCLD, environmental factors, and genetic background was analyzed. The results showed that APCLD was strongly influenced by environmental factors, which dynamically changed from heading to the mature stage. The solar radiation, luminous flux, and light hours were positively correlated with Fa but negatively correlated with Fb(1) and Fb(2). The temperature was negatively correlated with Fa and Fb(1) but positively correlated with Fb(2) and Fb(3). The temperature was the primary factor affecting APCLD, followed by humidity and light. There was no significant correlation between the indica pedigree percentage and APCLD. Furthermore, we detected six quantitative trait loci related to Fa, Fb(1), Fb(2), and Fb(3) chains, several of which shared a similar region to previously reported loci, including DENSE AND ERECT PANICLE 1 (DEP1). The truncated dep1 allele increased Fa, Fb(2), and Fb(3) but decreased Fb(1) in LN, whereas Fa was decreased but Fb1 and Fb2 were increased in JS. Elucidating the effects of climate factors and genetic background on APCLD could provide a theoretical basis and technical guidance for high-quality rice breeding.

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