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Waxy allele diversity in waxy maize landraces of Yunnan Province, China

文献类型： 外文期刊

作者： Wu Xiao-yang 1 ; Long Wen-jie 1 ; Chen Dan 1 ; Zhou Guo-yan 1 ; Du Juan 1 ; Wu Shao-yun 1 ; Cai Qing 1 ;

作者机构： 1.Yunnan Acad Agr Sci, Biotechnol & Germplasm Resources Inst, Kunming 650223, Yunnan, Peoples R China

关键词： waxy maize landraces; Waxy allele; transposon; gene regulatory region; Yunnan

期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：4.384； 五年影响因子：4.021 ）

ISSN： 2095-3119

年卷期： 2022 年 21 卷 2 期

页码：

收录情况： SCI

摘要： Waxy maize is one of the main fresh-eating maize types, and a mutation of the waxy gene causes the waxy character of maize grains. China is rich in waxy maize landraces, and Yunnan and its surrounding areas, are the place of origin and genetic diversity center of Chinese waxy maize. The six known waxy alleles of Chinese waxy maize are wx-D7, wx-D10, wx-Cin4, wx-124, wx-Reina, and wx-Xuanwei. The mutation sites of these alleles all occur in the coding region of the waxy gene, however, the mechanism by which the waxy characteristic is caused by the mutation in the regulatory region has only been reported rarely in maize. In this study, 405 waxy maize landraces from Yunnan were used as materials to identify the insertion and deletion of a large sequence fragment in the upstream similar to 3.5 kb regulatory region of the waxy gene by molecular marker detection. Three different waxy alleles were identifed in this study: wx-PIF/Harbinger, wx-hAT and wxElote2. These three types of mutations all represented transposons inserted into the regulatory region of the waxy gene. Wx-PIF/Harbinger was a 304-bp MITE class transposon insertion belonging to the PIF/Harbinger family, while wx-hAT was a 560-bp MITE class transposon insertion belonging to the hAT family, and wx-Elote2 was a 6560-bp LTR-like transposon insertion. In this study, the alleles were identifed for more than 70% of the waxy maize landraces in Yunnan, which provids a basis for the utilization of these waxy maize landraces.

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