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A 1.7-Mb chromosomal inversion downstream of aPpOFP1gene is responsible for flat fruit shape in peach

文献类型： 外文期刊

作者： Zhou, Hui 1 ; Ma, Ruijuan 4 ; Gao, Lei 1 ; Zhang, Jinyun 2 ; Zhang, Aidi 1 ; Zhang, Xiujun 1 ; Ren, Fei 6 ; Zhang, Weihan 7 ;

作者机构： 1.Chinese Acad Sci, Innovat Acad Seed Design, Wuhan Bot Garden, CAS Key Lab Plant Germplasm Enhancement & Special, Wuhan, Peoples R China

2.Anhui Acad Agr Sci, Inst Hort, Key Lab Genet Improvement & Ecophysiol Hort Crops, Hefei, Peoples R China

3.Chinese Acad Sci, Core Bot Gardens, Ctr Econ Bot, Wuhan, Peoples R China

4.Jiangsu Acad Agr Sci, Inst Hort, Nanjing, Peoples R China

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

6.Beijing Acad Agr & Forestry Sci, Inst Forestry & Pomol, Beijing, Peoples R China

7.Huazhong Agr Univ, Coll Informat, Agr Bioinformat Key Lab Hubei Prov, Wuhan, Peoples R China

8.Univ Illinois, Dept Nat Resources & Environm Sci, Urbana, IL USA

9.Chinese Acad Sci, Sino African Joint Res Ctr, Wuhan, Peoples R China

关键词： Prunus; flat peach; chromosomal inversion; ovate family protein; TONNEAU1-recruiting motif protein

期刊名称：PLANT BIOTECHNOLOGY JOURNAL （ 影响因子：9.803； 五年影响因子：9.555 ）

ISSN： 1467-7644

年卷期：

页码：

收录情况： SCI

摘要： Flat peaches have become popular worldwide due to their novelty and convenience. The peach flat fruit trait is genetically controlled by a single gene at theSlocus, but its genetic basis remains unclear. Here, we report a 1.7-Mb chromosomal inversion downstream of a candidate gene encoding OVATE Family Protein, designatedPpOFP1, as the causal mutation for the peach flat fruit trait. Genotyping of 727 peach cultivars revealed an occurrence of this large inversion in flat peaches, but absent in round peaches. Ectopic overexpression ofPpOFP1resulted in oval-shaped leaves and shortened siliques inArabidopsis, suggesting its role in repressing cell elongation. Transcriptional activation ofPpOFP1by the chromosomal inversion may repress vertical elongation in flat-shaped fruits at early stages of development, resulting in the flat fruit shape. Moreover,PpOFP1can interact with fruit elongation activatorPpTRM17, suggesting a regulatory network controlling fruit shape in peach. Additionally, screening of peach wild relatives revealed an exclusive presence of the chromosomal inversion inP. ferganensis, supporting that this species is the ancestor of the domesticated peach. This study provides new insights into mechanisms underlying fruit shape evolution and molecular tools for genetic improvement of fruit shape trait in peach breeding programmes.

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