Maize Genomics and Genetics 2025, Vol.16, No.2, 70-79 http://cropscipublisher.com/index.php/mgg 75 ultimate goal is to screen out high-quality germplasm for breeding work, which is crucial to improving the key traits of fresh corn. After all, only after finding good materials can we talk about subsequent breeding improvements. Figure 2 The molecular characteristics of maize genomes (Adopted from Shu et al., 2021) Image caption: (a) Minor allele frequency distribution; (b) Physical distance between adjacent SNP loci; (c) LD pattern of SNP loci along each of the 10 chromosomes; (d) The Relative kinship of 490 inbreds 6.2 Genetic improvement potential of germplasm resources When it comes to the potential for improvement of fresh corn, it is actually much greater than we imagined. Researchers recently discovered that even for those commercial inbred lines, there is still a lot of untapped genetic diversity hidden in the gene pool (Slonecki et al., 2023). Interestingly, when SNP markers were used to detect different breeding groups, it was found that the genetic differences between them were quite obvious-this is not a bad thing, but it provides more possibilities for breeding new varieties. What is even more exciting is that by combining several kernel mutant genes together (Priyanka et al., 2021), the sugar and anthocyanin content of fresh corn can be further improved. Although the varieties on the market are already good, according to this trend, it should not be difficult to develop healthier and more distinctive fresh corn in the future. 6.3 Mechanisms for global germplasm conservation and sharing When it comes to protecting the germplasm resources of fresh corn, there are actually quite a lot of ways. For example, they can be allowed to grow slowly, or stored at low temperatures, or a special gene bank can be
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