Page 112 - 《水产学报》2025年第8期

2025, 49(8): 089310 JOURNAL OF FISHERIES OF CHINA

DOI: 10.11964/jfc.20250114844

Differentiation of genetic diversity and byssal pheno-
type among wild populations of Mytilus coruscus loc-

ated at different latitudes

第一作者：林悦彤，从事贝类遗传育
种研究，E-mail：m220100046@st.shou.
LIN Yuetong 1,2,3 , WANG Yuqing 1,2,3 , NI Jiyue 1,2,3 , LI Yifeng 1,2,3* , edu.cn

LU Xia 4*
1. International Research Center for Marine Biosciences, Ministry of Science and Tech-
nology, Shanghai Ocean University, Shanghai 201306, China; 2. Key Laboratory of
Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai
Ocean University, Shanghai 201306, China; 3. Shanghai Aquatic Animal Breeding and
Green Breeding Cooperative Innovation Center, Shanghai Ocean University, Shanghai
201306, China; 4. School of Ocean, Yantai University, Yantai 264005, China

通信作者：李一峰，从事贝类养殖与
遗传育种研究，E-mail：yifengli@shou.
Abstract: The mussel is one of the main cultivated species in the world. A significant
edu.cn；
challenge faced by suspension-cultured mussels is the high incidence of mussel fall-off 卢霞，从事贝类遗传育种研究，E-mail：
luxia@ytu.edu.cn
from cultivation ropes, adversely impacting harvest yields, which have been documented
at commercial mussel farms in the United Kingdom, the United States of America,
Canada, Spain, New Zealand and China. Byssus is an important attachment structure for
marine mussels, and weakness in byssal thread attachment is a major factor leading to
mussel detachment from ropes. To investigate the relationship between genetic variability
and byssal thread phenotypic characteristics in the hard-shelled mussel (Mytilus
coruscus), we collected three wild populations of M. coruscus from different latitudes in

the East China Sea, including the Shengsi (SS), Jiaojiang (JJ), and Fuding (FD) popula-
资助项目：国 家 重 点 研 发 计 划
tions. The genetic diversity and structure of these populations were investigated using 10 (2022YFD2401700)； 国家自然科学基
金 (32172992)
microsatellite loci. The mean observed heterozygosity (H o ) in the SS population was 0.44,
收稿日期：2025-01-14
higher than the mean H o values of the JJ (0.40) and FD (0.39) populations. The mean
修回日期：2025-03-23
inbreeding coefficients (F is ) in the SS population was 0.20, lower than the mean F is val-
文章编号：
ues of the JJ (0.33) and FD populations (0.40). These results revealed that the SS popula- 1000-0615(2025)08-089310-12
中图分类号：Q 347；S 932.6
tion exhibited higher genetic diversity compared to the other two populations. The differ-
文献标志码：A
ent numbers of private alleles (P a ) in the three populations, ranging from 10 to 17, sug-
作者声明本文无利益冲突
gest that these populations have experienced selective pressures from various environ-
© 《水产学报》编辑部(CC BY-NC-ND 4.0)
ments. Moreover, genetic differentiation was observed in the genetic distance between the Copyright © Editorial Office of Journal of
Fisheries of China (CC BY-NC-ND 4.0)
SS population and the other two populations. We also examined the phenotypic character-

istics of their byssal threads. There were significant differences in byssus attachment
strength among the three populations, with the SS population located at the highest latit-
ude secreting more byssal threads and exhibiting greater byssal breaking force and plaque
adhesion strength, while the Fuding (FD) population located at the lowest latitude had the
weakest byssal attachment. The observed differentiation in private alleles and byssus
phenotypes might suggest that the three wild populations have experienced different

中国水产学会主办 sponsored by China Society of Fisheries https://www.china-fishery.cn
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