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Genetic mapping and validation of QTL controlling fruit diameter in cucumber

文献类型： 外文期刊

作者： Wang, Wenjiao 1 ; Xu, Zhaoying 1 ; Qian, Linna 1 ; Hang, Shuo 1 ; Niu, Yijie 1 ; Shen, Chengcheng 1 ; Wei, Yuping 1 ; Liu, Bin 2 ;

作者机构： 1.Shanxi Agr Univ, Coll Hort, Taigu 030801, Shanxi, Peoples R China

2.Xinjiang Acad Agr Sci, Hami Melon Res Ctr, Urumqi 830091, Xinjiang, Peoples R China

3.Sanya Mingzhu Melon & Watermelon Variety Demonstra, Sanya 572022, Hainan, Peoples R China

关键词： GBS; KASP; QTL mapping; Fruit diameter; Cucumber

期刊名称：BMC PLANT BIOLOGY （ 影响因子：4.8； 五年影响因子：5.4 ）

ISSN： 1471-2229

年卷期： 2024 年 24 卷 1 期

页码：

收录情况： SCI

摘要： Fruit diameter is one of important agronomy traits that has greatly impacts fruit yield and commercial value in cucumber (Cucumis sativus L.). Hence, we preliminary mapping of fruit diameter was conducted to refine its genetic locus. In this study, to genetic mapping of QTLs that control cucumber fruit diameter, a F2 population with 120 individuals was developed by the East Asian line '9930' (known as narrow fruit diameter) and the European-type cucumber 'EU224' (known as wide fruit diameter). Then a Genotyping-by-Sequencing (GBS)-based genetic map with 5662 markers was constructed and the total length is 656.177 cM, with average marker interval of 0.116 cM. Based on this high-density genetic map, a major QTL qfd1.1 related to fruit diameter was detected with a markedly high LOD score 4.07 located approximately 300 kb interval on Chromosome 1 (located between Chr1:1654704-1958556). To confirm qfd1.1 that detected by F2 population, we performed genetic mapping of fruit diameter with an introgression line (IL) about fruit diameter. We developed two KASP markers (FD-1 and FD-2) related to the fruit diameter. Based on this, we inserted the European cucumber EU224 into the qfd1.1 range and targeted widening the fruit diameter of the 9930 cucumber variety, further indicating that qfd1.1 is a new locus regulating the fruit diameter of cucumber. Our findings will support breeders in their research on cucumber fruit diameter.

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