Page 118 - 《水产学报》2025年第8期

林悦彤，等 水产学报, 2025, 49(8): 089310

25 a 0.25 a b
mean byssal thread no. 15 b b byssal thread diameter mm 0.15 c
20
0.20

10
0.10

0 5 0.05
0
SS JJ FD SS JJ FD
population population
(a) 1.00 a (b) b

ab
byssal breaking force/N 1.50 b c plaque adhesion strength/N 0.80
a
1.00
0.60

0.40
0.50

0 0.20
0
SS JJ FD SS JJ FD
population population
(c) (d)
Fig. 3 Byssus secretion number (a), byssal thread diameter (b), byssal breaking force (c), and
plaque adhesion strength (d) of three wild populations of M. coruscus
Different letters above the columns indicate statistically significant differences (P<0.05).
sel on the byssal strength, the difference of shell tions from varying latitudes, alongside evaluations
length and wet weight was analyzed among the of mussel growth parameters and byssal threads
three populations. The shell length of JJ population phenotypic characteristics. Our analysis revealed
was significantly higher than other populations that the byssal thread phenotypes of these popula-
(P<0.05; Fig. 4-a). There was a significant differ- tions had undergone adaptive evolution and genetic
ence in wet weight among the three populations, differentiation in response to distinct environmental
with JJ population having the heaviest wet weight conditions. Notably, the SS population located at
relative to the SS and FD populations (P<0.05; the highest latitude demonstrated both higher
Fig. 4-b). The correlation analysis between byssus genetic diversity and superior byssal thread charac-
phenotype and growth parameters are shown in teristics, but the FD population located at the low-
Fig. 4-c. Plaque adhesion strength and byssal thread
est latitude showed lower genetic diversity and
diameter were positively correlated with wet
weaker adhesive ability, highlighting the impact of
weight, while byssus secretion number was negat-
environmental factors on phenotypic expression.
ively correlated with shell length and plaque adhe-
These results provide valuable insights for the con-
sion strength, but all the correlation coefficients
servation of M. coruscus germplasm resources and
were very low.
facilitate the identification of founders with excep-

tional byssus traits for selective breeding efforts.
3 DISCUSSION
Genetic diversity is normally assessed by
In this study, we employed 10 highly poly- genetic parameters, including PIC and heterozygos-
[27]
morphic microsatellite markers to assess the genetic ity . The current study reported that the PIC val-
diversity and structure of wild M. coruscus popula- ues for 10 SSR loci ranged from 0.960 to 0.970,

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