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RNA-Seq analysis unveils gene regulation of fruit size cooperatively determined by velocity and duration of fruit swelling in peach

文献类型： 外文期刊

作者： Gu, Chao 1 ; Zhou, Yu-Hang 1 ; Shu, Wei-Sheng 1 ; Cheng, Hai-Yan 1 ; Wang, Lu 2 ; Han, Yue-Peng 2 ; Zhang, Yu-Yan 3 ; Yu, 1 ;

作者机构： 1.Nanjing Agr Univ, Coll Hort, State Key Lab Crop Genet & Germplasm Enhancement, Nanjing 210095, Jiangsu, Peoples R China

2.Chinese Acad Sci, Wuhan Bot Garden, Key Lab Plant Germplasm Enhancement & Specialty A, Wuhan 430074, Hubei, Peoples R China

3.Jiangsu Acad Agr Sci, Jiangsu Key Lab Hort Crop Genet Improvement, Inst Pomol, Nanjing 210014, Jiangsu, Peoples R China

4.Jiangsu Acad Agr Sci, Jiangsu Key Lab Hort Crop

期刊名称：PHYSIOLOGIA PLANTARUM （ 影响因子：4.5； 五年影响因子：4.576 ）

ISSN： 0031-9317

年卷期： 2018 年 164 卷 3 期

页码：

收录情况： SCI

摘要： Fruit swelling determines fruit size and usually occurs in two distinct time periods in peach. However, little is known about the gene regulation of fruit swelling. In this study, measurements of longitudinal and transverse diameters in developing and ripening peach fruits unveiled two periods of fruit swelling: the first swelling ends at approximately 65days after flower blooming (DAFB) and the second swelling starts at approximately 75 DAFB. Comparisons of diameters sizes and development periods among cultivars and accessions revealed a cooperative regulation of swelling velocity and swelling duration, which leads to final determination of fruit size. Furthermore, RNA-sequencing was conducted for fruits at the initial swelling, non-swelling interval between the two swellings (hereafter, the interval'), second swelling and ripening stages. A total of 110 and 128 differentially expressed genes were screened from fruits in the first and second swelling, respectively. Besides, the nine most differentially expressed genes located within the reported quantitative trait locations (QTLs) of fruit size in peach were detected in both the first and second swelling stages. Those genes have been reported to be involved in mediating cell size, which indicates the occurrence of both cell proliferation and cell expansion in each of the two major periods of fruit swelling. In addition, a potential gene regulation network is proposed herein and could be used to elucidate the molecular mechanism of peach fruit swellings mediated by multiple key genes.

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