International Journal of Horticulture, 2024, Vol.14, No.4, 263-274 http://hortherbpublisher.com/index.php/ijh 265 generating a total of 92 loci, of which 60 were polymorphic. The study also indicated that there are significant differences in genetic distance among these carrot varieties, highlighting the importance of AFLP markers in carrot breeding (Domblides and Domblides, 2023). Another study evaluated the genetic diversity structure of 78 western-type open-pollinated carrot cultivars using 93 DcS-ILP markers and 2354 SNP markers. The results showed that both marker systems were able to detect significant variation among carrot plants of different market types, indicating their utility in germplasm characterization and genome relationship analysis (Figure 1). The proportion of polymorphic loci varied widely among cultivars, ranging from 31.18% to 89.25%, revealing high levels of intra-cultivar genetic heterogeneity. Notably, cultivars of the Amsterdam and Chantenay types exhibited strong genetic consistency, while cultivars of other market types showed higher genetic heterogeneity. The study also found that despite the significant phenotypic differences among carrot cultivars of different market types, they displayed relative consistency at the genetic level (Stelmach et al., 2021). These findings are important for further carrot breeding and germplasm resource management. Figure 1 Estimated genetic structure of 78 carrot cultivars based on DcS-ILP markers, inferred for K = 3–5 and K = 7 (Adopted from Stelmach et al., 2021) Image caption: The figure shows the results of genetic structure analysis of 78 carrot cultivars based on the DcS-ILP marker system under different assumed numbers of groups (K=3, 4, 5, 7). Each vertical bar in the figure represents a cultivar, with color segments indicating its proportion of membership in different genetic groups. Cultivars of the Amsterdam and Chantenay types exhibited high genetic consistency across all assumed group numbers, while other types, such as Nantes and Imperator, displayed more genetic admixture. This indicates significant differences in the genetic structure of different carrot market types, further validating the effectiveness of the DcS-ILP marker system in revealing carrot genetic diversity and population structure (Adapted from Stelmach et al., 2021)
RkJQdWJsaXNoZXIy MjQ4ODYzNA==