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Genetic diversity and population structure among cultivars of Saccharina japonica currently farmed in northern China
Li, Xia1,2; Pang, Shao J.1,2; Shan, Ti F.1,2
2017-04-01
Source PublicationPHYCOLOGICAL RESEARCH
Volume65Issue:2Pages:111-117
SubtypeArticle
AbstractClose to 50% of the annual production of the brown alga Saccharina japonica, about 2 million tons (fresh weight), is produced through farming in Shandong province, China, principally around Rongcheng. Under artificial selection for phenotypic traits (e.g. color, blade length) cultivated strains (cultivars) face the problems of inbreeding depression, which can be caused by the close relationships of the parental plants. Hence, in an attempt to evaluate genetic variations and relationships among cultivars, 15 major farmed cultivars were selected and sampled from seven major hatcheries and analyzed using 15 microsatellite markers. A total of 94 alleles were found across all samples, with allele numbers ranging from three to 17 per locus. All of the cultivars exhibited relatively high levels of genetic diversity, with mean Nei's genetic diversity (H) and the Shannon's information index (I) of 0.466 and 0.862, respectively. A UPGMA dendrogram grouped all cultivars into three main clusters. However, two of the most commonly farmed cultivars (DB and BN) from different hatcheries failed to cluster together. Instead, differently named cultivars from the same hatchery tended to group together, implying that their high similarities is partly due to the presence of genetic mixing among cultivars within a hatchery or misuse of cultivar's names. Genetic analysis performed by Bayesian model-based clustering revealed clear differentiation of three major subgroups (LJ-202 and LJ-205; LJ-C033; XS-2 and XS-BN) and one admixed group (the remaining ten cultivars). Our results revealed ambiguous genetic relationships among certain cultivars of S. japonica farmed in northern China. A more stringent and prudent regulation should be applied during breeding and production process in the future.
KeywordBreeding Dna Marker Genetic Structure Kelp Cultivation Microsatellite Analysis
DOI10.1111/pre.12167
Indexed BySCI
Language英语
WOS IDWOS:000398593900002
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Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/136734
Collection实验海洋生物学重点实验室
Affiliation1.Chinese Acad Sci, Inst Oceanol, Key Lab Expt Marine Biol, Qingdao, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Biol & Biotechnol, Qingdao, Peoples R China
First Author Affilication中国科学院海洋研究所
Recommended Citation
GB/T 7714
Li, Xia,Pang, Shao J.,Shan, Ti F.. Genetic diversity and population structure among cultivars of Saccharina japonica currently farmed in northern China[J]. PHYCOLOGICAL RESEARCH,2017,65(2):111-117.
APA Li, Xia,Pang, Shao J.,&Shan, Ti F..(2017).Genetic diversity and population structure among cultivars of Saccharina japonica currently farmed in northern China.PHYCOLOGICAL RESEARCH,65(2),111-117.
MLA Li, Xia,et al."Genetic diversity and population structure among cultivars of Saccharina japonica currently farmed in northern China".PHYCOLOGICAL RESEARCH 65.2(2017):111-117.
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