Genetic relationship analysis and molecular fingerprint identification of the tea germplasms from Guangxi Province, China

The tea plant (Camellia sinensis) is an evergreen woody plant with a high economic value. Guangxi Province is adjacent to the origin center of the tea plant in southern China. It has abundant germplasm resources and is a historically important tea-producing province. However, there is little informa...

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Bibliographic Details
Published in:Breeding Science 2021, Vol.71(5), pp.584-593
Main Authors: Guo, Rui, Xia, Xiaobo, Chen, Jia, An, Yanlin, Mi, Xiaozeng, Li, Rui, Zhang, Cao, Chen, Minyi, Wei, Chaoling, ShengLi, Ruiu
Format: Article
Language:English
Subjects:
Chemical fingerprinting
Clustering
Cultivars
fingerprinting
Genetic analysis
Genetic diversity
genetic introgression
Genetic relationship
Germplasm
Guangxi Province
Markers
Phylogeny
Plant breeding
Population genetics
Population structure
Research Paper
SSR markers
Structural analysis
Subgroups
Tea
tea plant
Woody plants
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Summary:The tea plant (Camellia sinensis) is an evergreen woody plant with a high economic value. Guangxi Province is adjacent to the origin center of the tea plant in southern China. It has abundant germplasm resources and is a historically important tea-producing province. However, there is little information about the genetic diversity, genetic introgression, and fingerprints of the tea germplasms from Guangxi Province. Here, we constructed a phylogenetic tree of 126 tea accessions from Guangxi Province using 20 SSR markers. This tree classified these tea accessions into three subgroups containing 19, 47, and 60 members, respectively. High genetic similarity was observed among the three subgroups, and the genetic diversity of the populations was ranked as follows: subgroup 3 > subgroup 2 > subgroup 1. Furthermore, we analyzed the genetic relationships among 168 tea accessions from Guangxi Province and neighboring provinces. The results of the population structure analysis were highly consistent with the clustering results, and genetic introgression was observed. We identified six SSRs as the core marker set, because they could sufficiently distinguish between all 126 tea accessions. The results provide a crucial theoretical basis for utilization and protection of tea germplasms from Guangxi Province, and will help improve the breeding and popularization of elite tea cultivars.
ISSN:1344-7610
1347-3735
DOI:10.1270/jsbbs.21007