• Proceedings of the Korean Aquaculture Society Conference
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• 2004.05a
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• pp.232-233
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• 2004

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2001.10a
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• pp.279-280
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• 2001

넙치(Paralichthys olivaceus)는 1980년대 초부터 일본으로부터 수정란을 도입하여 양식되기 시작하였으며, 현재 전 연안에서 종묘생산 또는 양식이 이루어지고 있다. 그러나 최근 연안어장의 오염과 질병의 발생으로 인해 넙치 양식 생산성이 크게 낮아지고 있다. 또한 장기간 동일계통의 넙치를 친어로 이용함으로서 유전적 열성화로 인한 많은 문제점이 나타나고 있는 실정이다. (중략)

• Korean journal of applied entomology
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• v.35 no.3
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• pp.260-265
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• 1996

A field colony of the two-spotted spider mite, Tetranychus urticae Koch, was selected with tetradifon for 4 mousing whole-plant residual method. This strain showed 371-fold resistance to tetradifon. The log dosehatchability lines of $F_{1}$ eggs(RS cross; Td5female$\times$Smale, and SR cross; Sfemale$\times$Td5male) were closer to the line of the resistant colony than to that of the susceptible. These differences could be due to cytoplasmic inheritance or maternal effect. The estimate of dominance index (D) for the $F_{1}$ eggs of RS cross was 0.998 and that for $F_{1}$ eggs of SR cross was 0.262. This indicates that tetradifon resistance is completely dominant in RS cross and incompletely dominant in SR cross. Td5 strain exhibited high levels of resistance to clofentezine, benzoximate, and chlorfencon, and no cross resistance to fenazaquin, pyridaben, flufenoxuron, tebufenpyrad, and fenothiocarb.

• Korean Journal of Microbiology
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• v.53 no.1
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• pp.58-60
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• 2017

Halioglobus sp. RR3-57 was isolated from a biofilter of a seawater recirculating aquaculture system and its complete genome sequence was obtained using the PacBio RS II platform. Two circular contigs were assembled and considered as a chromosome and a plasmid (size of 4,847,776 bp and 155,799 bp, and G+C content of 57.5% and 53.2%, respectively). Genomic analysis showed RR3-57 had 18 denitrification-related genes and an incomplete prophage.

• Korean Journal of Microbiology
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• v.53 no.1
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• pp.67-69
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• 2017

Complete genome sequences were retrieved from the strain RR3-28 that was isolated from a seawater recirculating aquaculture system and related to the genus Nitratireductor. The genome sequence consists of a single, circular chromosome of 3,357,577 bp with 58.6% G+C content. The genome was identified to contain twenty-one genes related to denitrification and one intact prophage.

• Korean Journal of Ichthyology
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• v.32 no.4
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• pp.210-221
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• 2020

Since the introduction of Israeli carp into Korea for farming in 1973, there are no breeding studies on developing Korea Israeli carp (domestic) so far. This study performed gene-based cross-breeding studies to restore genetic diversity of lowered Israeli carp through continuous inbreeding, and for rapid growth and better scales. This study produced four cross-breeding groups (F1) using Koean Israeli carp and Chinese Songpu mirror carp for the improvement of growth and scale of Israeli carp in Korea. And mating scheme for breeding groups was set in consideration of the morphological analysis and genetic distance of broodstock. In addition, this study used microsatellite markers and genotype data to analyze genetic diversity and parentage analysis. As a result, the average N_A and H_E values of Korean select broodstock are 8.3 and 0.743, and F1 is 13.0 and 0.764. This study shows that the genetic diversity of F1 has been recovered over Korean Israeli carp through breeding between Korean Israeli carp and Chinese Songpu mirror carp. Common Israeli carp in Korea reached 1.7 kg in 17 months, and improved Israeli carp reached to 2.2 kg. The KC (Korea×China, KC) group was 2.52 and broodstock group was 3.15. F1 showed lower scale score (0.63) than broodstock. The improved carp (F1; CK, KC) had 20% better scales than the parent group (F0), which improved 27% in weight and 25% in scales compared to common Israeli carp. The Israeli carp developed by the genetics-based breeding grew quicker and had improved genetic diversity and fewer scales, which will be of great value for Korean Israeli aquaculture industry due to good marketability.

• Journal of Aquaculture
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• v.9 no.4
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• pp.437-444
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• 1996

Genetic characterization and identification of two types of sea bass Lateolabrax japonicus were performed by examining electrophoretic patterns of isozymes. Twenty five loci coding for thirteen enzymes were detected in two types. Among the twenty five loci, one completely divergent loci (Pt-1) was observed between two types. Nei's genetic distance between two types was 0.12036. The estimated divergence time of these two types may have about $6.2{\times}10^5$ years ago. On the other hands, the expected average heterozygosity was 0.084 in not spotted type on the body surface and 0.067 in spotted type on the body surface. These results mean that the existance of two types of sea bass was established in present study which may have had genetic divergence.

• Journal of Aquaculture
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• v.20 no.4
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• pp.255-259
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• 2007

Genetic diversity among four populations of Chinese shrimp Fenneropenaeus chinensis from Narodo, Yeonggwang, Taean and Chinese Bohai Bay was assessed by amplified fragment length polymorphism (AFLP) DNA fingerprinting. Total numbers of AFLP bands generated (ranging from 251 to 254) and average percent of polymorphic bands (27.1 to 28.1 %) were similar in the four populations. Heterozygosity and genetic diversity within or among the populations were very low for the populations with average values ranging from 0.1177 to 0.1288 and from 0.1099 to 0.1194, respectively. Analyses of pairwise distance, Fst index and genetic similarity among the populations also revealed the similar results with very low genetic differentiation each other. These results suggest that all the wild populations tested in the present analysis may be belonging to the same genetic origin, and also that they may have a close relationship in genetic structure without any significant differentiation.

• Journal of agriculture & life science
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• v.46 no.6
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• pp.1-8
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• 2012

This study was carried out to determine the genic values of taste of Korean hot pepper (Capsicum annuum L.) in practical genetic resources of using to breed them. The two breeding materials of pepper, '#1803' ($P_1$) of prefer tastes and '#1532' ($P_2$) of ordinary taste, and their $F_1$, $F_2$ generations were used in this study. By using partitioning method it was possible to estimate, from the $F_2$ generation, the number of effective factor pairs differentiating the two parents. There were found to be differentiated by two effective factor pairs. In practical genetic resource of using to breed the Korean hot pepper, the heritance of pepper tastes showed that the $F_1$ was better than excellent parent by reason of over dominant, but some $F_2$ was better than both parent by transgressive segregation. As the result, the magnitude of genic effects of A-a gene in pepper tastes was 0.36, and B-b gene was 0.64. The tastes of Korean hot pepper showed a complex inheritance by interaction effect on the two non-allelic factors of 0.94 and secondary effect of 2.86 at the most.

• The Korean Journal of Malacology
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• v.28 no.3
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• pp.269-274
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• 2012

The genetic variation of Ark Shell, Scapharca broughtonii black was estimated using six polymorphic microsatellite (MS) loci in 443 individuals collected from five populations in Korea. The mean numbers of alleles per locus in five populations were 10-28. The mean number of alleles per locus in Jinhae Hatchery (JHH) population showed the least value as 15.5, but that in Gangjin (GJ) population showed the most value as 20.3. The mean expected heterozygosity in Saryangdo (SR) population showed the least value as 0.817, but that in Gangjin (GJ) population showed the most value as 0.831. In Jinhae hatchery(JHH) population, the mean expected heterozygosity was 0.822, there was no significant difference from those of wild population. The $F_{ST}$ values in Gangjin (GJ) population showed significant difference from those of the other populations, which revealed Gangjin (GJ) population is genetically different from the other populations. The $F_{ST}$ values among Jinhae Hatchery (JHH) population, Jinhae (JH) population and Saryangdo (SR) population showed lower values than the others, which implies there was a gene flow among these three populations. The $F_{ST}$ value and genetic distance between Jinhae (JH) population and Saryangdo (SR) population showed the least value as 0.0001 and 0.0386, indicating that these two populations were genetically the same.