Genetic Basis of Sweetness of Super-sweet Corn, Minshuangse No. 6

LIN Jing; ZHANG Yang; LIN Jianxin; LU Heding; CHEN Shanhu; LIAO Changjian

doi:10.19303/j.issn.1008-0384.2022.007.001

Volume 37 Issue 7

Jul. 2022

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Article Navigation > Fujian Journal of Agricultural Sciences > 2022 > 37(7): 817-823

LIN J, ZHANG Y, LIN J X, et al. Genetic Basis of Sweetness of Super-sweet Corn, Minshuangse No. 6 [J]. Fujian Journal of Agricultural Sciences，2022，37（7）：817−823 doi: 10.19303/j.issn.1008-0384.2022.007.001

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LIN J, ZHANG Y, LIN J X, et al. Genetic Basis of Sweetness of Super-sweet Corn, Minshuangse No. 6 [J]. Fujian Journal of Agricultural Sciences，2022，37（7）：817−823 doi: 10.19303/j.issn.1008-0384.2022.007.001

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Genetic Basis of Sweetness of Super-sweet Corn, Minshuangse No. 6

doi: 10.19303/j.issn.1008-0384.2022.007.001

Institute of Crop Research, Fujian Academy of Agricultural Sciences/Fujian Province Characteristic Dry Crop Variety Breeding Engineering Technology Research Center, Fuzhou, Fujian 350013, China

Received Date: 2022-03-25
Rev Recd Date: 2022-05-31

Available Online: 2022-08-07

Publish Date: 2022-07-28

Abstract

Abstract

Objective This study explored the key genes of sweet corn sweetness formation and the possible molecular mechanism of heterosis. Method Genotypes and expressions of sucrose synthase gene family of a super-sweet corn variety, Minshuangse No.6, and its parents were analyzed using bioinformatics, resequencing, transcriptome, and other techniques to unveil the underlining basis of the sweet taste of corns. Result Eighteen sucrose synthase genes were isolated from the corn kernels. Among them, Zm0001d029087 was found to belong to the same subfamily as Sh1, Sus1, and Sus2/3 with close evolution relationships. It might play a role in the sugar metabolism of the corn. Comparing both parents with B73, mutations were found in Sh1, Sus1, and Sus2/3. Of the 18 genes, only Zm0001d029087 and those 4 genes expresses in the kernels. Further analyses showed the 4 genes, except Sh1, had significantly lower expressions in Minshuangse No.6 than in both or one of the parents. Conclusion The genetic variations in the super-sweet Minshuangse No.6 revealed a unique characteristic of Zm0001d029087 that might relate to the sweetness of the corn kernels. A preliminary role of heterosis in sugar formation by that gene was proposed for further investigation.
- Minshuangse No. 6,
- sucrose synthase,
- genetic variation,
- expression analysis,
- heterosis

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References(25)

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