PJB-2023-1558
Genome-wide association mapping of seed reserve utilization during early seedling growth of sweet corn under salt stress
Jing-Yi Huang, Wang-Fei He, Zi-Qiang Hong, You-Xin Li, Baiyu Zhou and Xin-Xin Cheng
Abstract
Sweet corn is a special type of cultivated maize only used in food production. It results from a naturally occurring recessive mutation in the genes controlling sugar conversion to starch inside the corn kernel’s endosperm. In this study, we have found that the seed germination rate, seedling height, root length, weight of the mobilized seed reserve, and seed reserve utilization efficiency of 100 sweet corn seeds were significantly different. They also showed a downward trend with increasing salt concentration. A total of 37297 SNP markers were screened to identify valuable quantitative trait loci associated with the seed germination rate, seedling height, root length, weight of the mobilized seed reserve, and seed reserve utilization efficiency by genome-wide association study. Significant SNPs were successfully identified, and 28 quantitative trait loci were identified for all salt-related traits in hydroponic systems. Three major loci of Affx-91146, Affx-91055, and Affx-90658 were common. Their contributions were 15.06～19.56%, and positions 162789062, 2136131, and 1230444, respectively
To Cite this article:
Huang, J.Y., W.F. He, Z.Q. Hong, Y.X. Li, B. Zhou and X.X. Cheng. 2023. Genome-wide association mapping of seed reserve utilization during early seedling growth of sweet corn under salt stress. Pak. J. Bot., 55(5): DOI: http://dx.doi.org/10.30848/PJB2023-5(32)
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