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A key 'foxy' aroma gene is regulated by homology-induced promoter indels in the iconic juice grape 'Concord'

文献类型： 外文期刊

作者： Yang, Yingzhen 1 ; Cuenca, Jose 1 ; Wang, Nian 1 ; Liang, Zhenchang 2 ; Sun, Honghe 3 ; Gutierrez, Benjamin 4 ; Xi, Xi 1 ;

作者机构： 1.USDA ARS, Grape Genet Res Unit, Geneva, NY 14456 USA

2.Chinese Acad Sci, Inst Bot, Beijing Key Lab Grape Sci & Enol, Lab Plant Resources, Beijing, Peoples R China

3.Cornell Univ, Boyce Thompson Inst Plant Res, Tower Rd, Ithaca, NY 14853 USA

4.USDA ARS, Plant Genet Resources Unit, Geneva, NY USA

5.Shanghai Acad Agr Sci, Forestry & Pomol Res Inst, Shanghai, Peoples R China

6.Univ Chinese Acad Sci, Beijing, Peoples R China

7.E&J Gallo Winery, Modesto, CA USA

8.USDA ARS, Robert W Holley Ctr Agr & Hlth, Ithaca, NY 14853 USA

9.Inst Valenciano Invest Agr, Ctr Citricultura & Prod Vegetal, Valencia, Spain

10.Huazhong Agr Univ, Coll Hort & Forestry, Wuhan, Peoples R China

期刊名称：HORTICULTURE RESEARCH （ 影响因子：6.793； 五年影响因子：6.589 ）

ISSN： 2662-6810

年卷期： 2020 年 7 卷 1 期

页码：

收录情况： SCI

摘要： 'Concord', the most well-known juice grape with a parentage of the North American grape species Vitis labrusca L., possesses a special 'foxy' aroma predominantly resulted from the accumulation of methyl anthranilate (MA) in berries. This aroma, however, is often perceived as an undesirable attribute by wine consumers and rarely noticeable in the common table and wine grape species V. vinifera. Here we discovered homology-induced promoter indels as a major genetic mechanism for species-specific regulation of a key 'foxy' aroma gene, anthraniloyl-CoA:methanol acyltransferase (AMAT), that is responsible for MA biosynthesis. We found the absence of a 426-bp and/or a 42-bp sequence in AMAT promoters highly associated with high levels of AMAT expression and MA accumulation in 'Concord' and other V. labrusca-derived grapes. These promoter variants, all with direct and inverted repeats, were further confirmed in more than 1,300 Vitis germplasm. Moreover, functional impact of these indels was validated in transgenic Arabidopsis. Superimposed on the promoter regulation, large structural changes including exonic insertion of a retrotransposon were present at the AMAT locus in some V. vinifera grapes. Elucidation of the AMAT genetic regulation advances our understanding of the 'foxy' aroma trait and makes it genetically trackable and amenable in grapevine breeding.

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