Bioscience Methods 2024, Vol.15, No.6, 348-355 http://bioscipublisher.com/index.php/bm 349 2 Genetic Diversity in Sweet Potato 2.1 Geographic distribution of sweet potato germplasm Sweet potato (Ipomoea batatas (Lour.) Burkill) is cultivated globally, with significant germplasm collections in various regions. For instance, the National Agrobiodiversity Center (NAC) in South Korea has a substantial collection of sweet potato accessions from Korea, Japan, Taiwan, and the USA, highlighting the broad geographic distribution of this crop (Figure 1) (Lee et al., 2019). Similarly, sweet potato germplasms have been collected from six provinces of China, Japan, and America, indicating a wide geographic spread (Meng et al., 2021). The diversity within these collections is crucial for breeding programs aimed at improving sweet potato varieties. Figure 1 (A) Factorial analysis of the 8 cpSSR haplotypes. H, chloroplast haplotypes based on the median-joining network. (B) Original countries of sweet potato accessions and geographic distributions of the chloroplast haplotypes found. Pie charts on the map represent the chlorotype composition of the accessions and the colors in each chart represent the chlorotype indicated by factorial analysis (Adopted from Lee et al., 2019)
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