Seed Germination and Composition of Double and Triple Endosperm Mutants of Tropical Sweet Corn under Different Harvest and Storage Conditions

The development of inbred sweet corn lines that combine multiple endosperm mutants is an important aspect of breeding for eating quality. This study aimed to investigate the impact of different endosperm mutants, harvest times, and storage durations on traits related to seed quality and kernel carbohydrates. Sweet corn genotypes with specific gene combinations were carefully selected using single-nucleotide polymorphism (SNP) marker-assisted selection. Sixteen corn genotypes underwent germination assays through two tests: the standard between-paper test (BP test) and sand test (S test). The genotypes in each group were further refined based on germination and then evaluated for kernel carbohydrate dynamics during milk stages and postharvest storage. Each corn genotype exhibited distinct kernel carbohydrate dynamics during postharvest at each storage period. Out of 16 genotypes, four genotypes (K99, K30, 101L, and C13) were tolerant to degradation with slow rates [