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Jigang Han,Jian Li,Xiaoqing Li,Qunlu Liu,Yonghong Hu 한국원예학회 2021 Horticulture, Environment, and Biotechnology Vol.62 No.2
Tree peonies distributed in Baokang County (Hubei Province, China) (BKTPs) displayed extensive morphological variation,especially in fl ower color patterns and fruit setting rates. The genetic diversity of BKTPs and their relationships to nine wildspecies and 14 representative traditional cultivars were assessed using simple sequence repeat (SSR) markers in this study. All 19 analyzed loci were polymorphic, and 85 alleles were found. The number of alleles per locus varied from 3 to 7, withan average of 4.474. Cluster analysis with UPGMA method based on SSR markers partitioned 46 accessions of BKTPs intotwo major clusters and six subgroups, closing to P. ostii , P. qiui , P. rockii , P. jishanensis and diff erent cultivars, respectively. Analysis of fl avonoids with UPLC-Q-TOF-MS/MS revealed that Pn3G5G and Cy3G5G were the main anthocyanins ofthe pink and reddish-purple fl owers of BKTPs, which were undetectable in white fl owers. The fruit and seed setting ratesof BKTPs ranged from 4.00 to 26.00 per plant, and 130.00 to 858.00 per plant, respectively. The content of unsaturatedfatty acids was over 90% of the total fatty acids in the seed oils of BKTPs, with α-linolenic acid as the dominant compound(42.51–54.93%). Both phenotypic and molecular data suggested that the accessions of BKTPs were a hybrid complex resultedfrom introgression between the sympatrically distributed wild species and cultivars in Baokang, which provided novel geneticresources for tree peony breeding and germplasm innovation.
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