Sapkota Dikshya, Zhang Dapeng, Park Sunchung, Meinhardt Lyndel W, Yao Shengrui
Department of Plant and Environmental Sciences, New Mexico State University, Las Cruces, NM 88003, USA.
Sustainable Perennial Crops Laboratory, USDA-ARS, Beltsville Agricultural Research Center, Beltsville, MD 20705, USA.
Plants (Basel). 2023 Jun 21;12(13):2405. doi: 10.3390/plants12132405.
Since the early 19th century, a substantial amount of jujube ( spp.) germplasm has been introduced from China and Europe into the United States. However, due to a lack of passport data, cultivar mislabeling is common and the genetic background of the introduced germplasm remains unknown. In the present study, a low-density SNP array was employed to genotype 204 jujube trees sampled from multiple locations in New Mexico, Texas, Missouri, and Kentucky. Multilocus matching of SNP profiles revealed a significant rate of genetic redundancy among these jujube samples. A total of 14 synonymous groups were detected, comprising 48 accessions. Bayesian clustering analysis and neighbor-joining tree partitioned the US jujube germplasm into two major clusters. The first cluster included cultivated genotypes ( Mill.), whereas the other major cluster comprised the wild/sour jujube ( Hu.). The results also revealed a unique jujube population at Fabens/Tornillo, Texas, and a semi-naturalized population at Tucumcari, NM. These findings will provide valuable guidance to jujube growers and researchers on the effective utilization of jujube germplasm in the horticultural industry.
自19世纪初以来，大量枣属种质已从中国和欧洲引入美国。然而，由于缺乏护照数据，品种错误标注很常见，引入种质的遗传背景仍然未知。在本研究中，使用低密度SNP阵列对从新墨西哥州、得克萨斯州、密苏里州和肯塔基州多个地点采集的204株枣树进行基因分型。SNP图谱的多位点匹配显示这些枣样本中存在显著的遗传冗余率。共检测到14个同义组，包含48份种质。贝叶斯聚类分析和邻接法树状图将美国枣属种质分为两个主要类群。第一个类群包括栽培基因型（枣），而另一个主要类群包括野生/酸枣（酸枣）。结果还揭示了得克萨斯州法本斯/托里略的一个独特枣种群，以及新墨西哥州图库姆卡里的一个半归化种群。这些发现将为枣农和研究人员在园艺产业中有效利用枣属种质提供有价值的指导。
