Genetic diversity and population structure of the Fujian oyster <italic style="font-style: italic">Crassostrea angulata</italic> revealed by mitochondrial COⅠ gene and nuclear gene ITS2 sequences

Shiqi YU; Ziqiang HAN; Huayong QUE

doi:10.1007/s00343-025-4308-9

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Genetic diversity and population structure of the Fujian oyster Crassostrea angulata revealed by mitochondrial COⅠ gene and nuclear gene ITS2 sequences

Aquaculture and Fisheries | Updated：2026-03-26

- Genetic diversity and population structure of the Fujian oyster Crassostrea angulata revealed by mitochondrial COⅠ gene and nuclear gene ITS2 sequences
- Genetic diversity and population structure of the Fujian oyster Crassostrea angulata revealed by mitochondrial COⅠ gene and nuclear gene ITS2 sequences
- 海洋湖沼学报(英文) 2026年44卷第1期页码：419-432
- Affiliations：
  
  1.State Key Laboratory of Mariculture Breeding, Fisheries College, Jimei University, Xiamen 361021, China
  2.Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture and Rural Affairs, Fisheries College, Jimei University, Xiamen 361021, China
- Author bio：
  
  hanzq@jmu.edu.cn
  hque@jmu.edu.cn
- Funds：
  
  the National Natural Science Foundation of China(32172979);the Natural Science Foundation of Fujian Province(2021J05159);the 2023 Special Program for Promoting High-Quality Development of Marine and Fishery Industry in Fujian Province(PJHYF-L-2023-2)
- DOI：10.1007/s00343-025-4308-9
  中图分类号：
- 收稿：2024-11-17，
  
  录用：2025-02-25，
  
  网络首发：2025-04-22，
  
  纸质出版：2026-01-01
- Accepted：
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Shiqi YU, Ziqiang HAN, Huayong QUE. Genetic diversity and population structure of the Fujian oyster Crassostrea angulata revealed by mitochondrial COⅠ gene and nuclear gene ITS2 sequences[J]. 海洋湖沼学报(英文), 2026,44(1):419-432.

YU Shiqi,HAN Ziqiang,QUE Huayong.Genetic diversity and population structure of the Fujian oyster Crassostrea angulata revealed by mitochondrial COⅠ gene and nuclear gene ITS2 sequences[J].Journal of Oceanology and Limnology,2026,44(01):419-432.
Shiqi YU, Ziqiang HAN, Huayong QUE. Genetic diversity and population structure of the Fujian oyster Crassostrea angulata revealed by mitochondrial COⅠ gene and nuclear gene ITS2 sequences[J]. 海洋湖沼学报(英文), 2026,44(1):419-432. DOI： 10.1007/s00343-025-4308-9.

YU Shiqi,HAN Ziqiang,QUE Huayong.Genetic diversity and population structure of the Fujian oyster Crassostrea angulata revealed by mitochondrial COⅠ gene and nuclear gene ITS2 sequences[J].Journal of Oceanology and Limnology,2026,44(01):419-432. DOI： 10.1007/s00343-025-4308-9.

摘要

Abstract

The Fujian oyster (

Crassostrea

angulata

) is an economically significant shellfish species distributed mainly along the Fujian coast

Southeast China. However

its genetic diversity and structure remain unclear. The main distribution area of the

angulata

is located in Fujian

South China. In total

420

angulata

were collected from 14 natural habitats (populations) along the Fujian coast

and their genetic diversity and structure were analyzed in the mitochondrial COⅠ and nuclear gene ITS2 sequences. Results reveal that all the 14 populations of

angulata

exhibited high levels of genetic diversity

with a total of 57 (haplotype diversity: 0.811±0.016) and 124 (haplotype diversity: 0.912±0.007) haplotypes revealed by COⅠ and ITS2

respectively. Notably

significant intermediate level of genetic differentiations between the Ningde Zhujiang (ZJ) population (

by COI: 0.035–0.142

0.05;

by ITS2: 0.078–0.123

0.05) with other populations were observed for the first time

which is also supported by the results of molecular variance analysis (

by COⅠ: 0.105

0.05;

by ITS2: 0.086

0.05) and the clustering of the ZJ population into distinct branches in the interpopulation genetic differentiation tree. Furthermore

the evolutionary tree and haplotype network analyses do not support the formation of a clear geographical genealogical structure among these 14 populations. In addition

the population dynamics analysis suggests that the

angulata

may have undergone expansion during the third ice age of the Pleistocene. These results provide a reference for the preservation and further genetic

improvement of

angulata

关键词

Keywords

references

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Genetic diversity and population structure of the Fujian oyster Crassostrea angulata revealed by mitochondrial COⅠ gene and nuclear gene ITS2 sequences

DOI：10.1007/s00343-025-4308-9

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