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Natural polymorphisms in ZMET2 encoding a DNA methyltransferase modulate the number of husk layers in maize

文献类型： 外文期刊

作者： Wang, Zi 1 ; Xia, Aiai 1 ; Wang, Qi 1 ; Cui, Zhenhai 2 ; Lu, Ming 3 ; Ye, Yusheng 4 ; Wang, Yanbo 4 ; He, Yan 1 ;

作者机构： 1.China Agr Univ, Natl Maize Improvement Ctr China, State Key Lab Maize Biobreeding, Beijing 100094, Peoples R China

2.Shenyang Agr Univ, Shenyang Key Lab Maize Genom Select Breeding, Shenyang 110866, Peoples R China

3.Jilin Acad Agr Sci, Maize Res Inst, Gongzhuling 136100, Peoples R China

4.Liaoning Acad Agr Sci, Maize Res Inst, Shenyang 110065, Peoples R China

期刊名称：PLANT PHYSIOLOGY （ 2022影响因子：7.4； 五年影响因子：8.7 ）

ISSN： 0032-0889

年卷期： 2024 年

页码：

收录情况： SCI

摘要： DNA methylation affects agronomic traits and the environmental adaptability of crops, but the natural polymorphisms in DNA methylation-related genes and their contributions to phenotypic variation in maize (Zea mays) remain elusive. Here, we show that a polymorphic 10-bp insertion/deletion variant in the 3 ' UTR of Zea methyltransferase2 (ZMET2) alters its transcript level and accounts for variation in the number of maize husk layers. ZMET2 encodes a chromomethylase and is required for maintaining genome-wide DNA methylation in the CHG sequence context. Disruption of ZMET2 increased the number of husk layers and resulted in thousands of differentially methylated regions, a proportion of which were also distinguishable in natural ZMET2 alleles. Population genetic analyses indicated that ZMET2 was a target of selection and might play a role in the spread of maize from tropical to temperate regions. Our results provide important insights into the natural variation of ZMET2 that confers both global and locus-specific effects on DNA methylation, which contribute to phenotypic diversity in maize. Natural variation in Zea methyltransferase2 confers both global and locus-specific effects on DNA methylation, thereby contributing to phenotypic diversity in maize.

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