Bertram Lisa, Gholami Mahmood, Kopisch-Obuch Friedrich, Frisch Matthias
Institute of Agronomy and Plant Breeding II, Justus Liebig University, Giessen, Germany.
KWS SAAT SE & Co. KGaA, Einbeck, Germany.
Front Plant Sci. 2025 Aug 14;16:1635602. doi: 10.3389/fpls.2025.1635602. eCollection 2025.
Sea beet [ ssp. (L.) Arcang.] populations exhibit high genetic diversity and possess valuable traits that could enhance resilience, disease resistance, and tolerance to abiotic stress. In contrast, the genetic variation in the sugar beet breeding gene pool is limited. Our objectives were to examine sea beet population diversity using high-density marker data and substantial sample sizes within a population simultaneously. Their genetic diversity and population structure were investigated to evaluate their potential for direct mapping of traits with association mapping. Within this study, a total of 1,363 genotypes across three Northern Atlantic sea beet populations from Denmark, France, and Ireland were analyzed using 16,201 SNP markers. The findings reveal genetic variation among the populations, with the Irish population exhibiting the highest genetic diversity and pronounced population structure. The Danish population showed low genetic diversity and minimal population structure, while the French population displayed intermediate levels of both, genetic diversity and population structure. Based on its high genetic diversity, the Irish population appears to have the most potential for use to directly map traits by association mapping, provided that the challenges posed by the severe population structure can be adequately addressed within analysis.
海甜菜[亚种（L.）Arcang.]种群表现出高度的遗传多样性，并拥有可增强恢复力、抗病性和对非生物胁迫耐受性的宝贵性状。相比之下，甜菜育种基因库中的遗传变异有限。我们的目标是同时使用高密度标记数据和种群内大量样本量来研究海甜菜种群多样性。研究了它们的遗传多样性和种群结构，以评估它们通过关联作图直接定位性状的潜力。在本研究中，使用16201个单核苷酸多态性（SNP）标记对来自丹麦、法国和爱尔兰的三个北大西洋海甜菜种群的总共1363个基因型进行了分析。研究结果揭示了种群之间的遗传变异，爱尔兰种群表现出最高的遗传多样性和明显的种群结构。丹麦种群遗传多样性低，种群结构最小，而法国种群的遗传多样性和种群结构均处于中等水平。基于其高遗传多样性，爱尔兰种群似乎最有潜力通过关联作图直接定位性状，前提是在分析中能够充分应对由严重种群结构带来的挑战。
