0genome-wide association mapping of seed reserve utilization during early seedling growth of sweet corn under salt stress | [Pakistan Journal of Botany • 2023]

Author(s):

1. JING-YI HUANG: College of Agriculture, Anhui Science and Technology University,Fengyang, Anhui, 233100,PR China

2. WANG-FEI HE: College of Agriculture, Anhui Science and Technology University,Fengyang, Anhui, 233100,PR China

3. ZI-QIANG HONG: College of Agriculture, Anhui Science and Technology University,Fengyang, Anhui, 233100,PR China

4. YOU-XIN Li: College of Agriculture, Anhui Science and Technology University,Fengyang, Anhui, 233100,PR China

5. BAIYU ZHOU: College of Agriculture, Anhui Science and Technology University,Fengyang, Anhui, 233100,PR China

6. XIN-XIN CHENG: College of Agriculture, Anhui Science and Technology University,Fengyang, Anhui, 233100,PR China

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, Affx91055, and Affx-90658 were common. Their contributions were 15.06~19.56%, and positions 162789062, 2136131, and 1230444, respectively.

Page(s): 1739-1746

DOI: 10.30848/PJB2023-5(32)

Published: Journal: Pakistan Journal of Botany, Volume: 55, Issue: 5, Year: 2023

Keywords:

Salt stress , sweet corn , seed germination , Seed reserve utilization

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