Population genetic structure of  wild and hatchery black rockfish Sebastes inermis  in Korea, assessed using cross-species  microsatellite markers.
The  population structure of the black rockfish, Sebastes inermis (Sebastidae),  was estimated using 10 microsatellite loci developed for S. schlegeli on  samples of 174 individuals collected from three wild and three hatchery  populations in Korea. Reduced genetic variation was detected in hatchery  strains [overall number of alleles (N(A)) =  8.07; allelic richness (A(R)) =  7.37; observed heterozygosity (H(O)) =  0.641] compared with the wild samples (overall N(A) = 8.43; A(R) = 7.83; H(O) =  0.670), but the difference was not significant. Genetic differentiation among  the populations was significant (overall F(ST) =  0.0237, P < 0.05). Pairwise F(ST) tests,  neighbor-joining tree, and principal component analyses showed significant  genetic heterogeneity among the hatchery strains and between wild and hatchery  strains, but not among the wild populations, indicating high levels of gene  flow along the southern coast of Korea, even though the black rockfish is a  benthic, non-migratory marine species. Genetic differentiation among the  hatchery strains could reflect genetic drift due to intensive breeding  practices. Thus, in the interests of optimal resource management, genetic  variation should be monitored and inbreeding controlled within stocks in  commercial breeding programs. Information on genetic population structure based  on cross-species microsatellite markers can aid in the proper management of S.  inermis populations.
Genetics and Breeding Research Center, National Fisheries Research and Development Institute, Gyeongsangnamdo, Korea. hsan@nfrdi.go.kr
H S
HS
An
E-M
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Kim
J-H
JH
Lee
J K
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Noh
C M
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An
S J
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Yoon
K D
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Park
J-I
JI
Myeong
D000818:Animals; D005399:Fishes / Q000235:genetics*; D014644:Genetic Variation; D005828:Genetics, Population; D007178:Inbreeding; D018895:Microsatellite Repeats / Q000235:genetics*; D056910:Republic of Korea; D013045:Species Specificity