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송인선,한현석,손진기,이병래 강릉대학교동해안지역연구소 1999 東海岸硏究 Vol.10 No.1
새로운 냉수성 어종의 개발을 목표로 세포유전학 연구에 필요한 기초적인 실험을 실시하기 위하여 무지개송어와 산천어를 이용하여 유전물질을 분석하였다. 무지개송어는 염색체가 60개(48.6%), 61개(20.7%) 나타났고 22쌍의 metacentric 또는 submetacentric, 8쌍의 submetacentric 또는 acrocentric 염색체로 구성 되었고, 2n=61인 개체는 43개의 metacentric 또는 submetacentric, 9쌍의 submetacentric 또는 accentric 염색체로 구성되었다. 산천어는 염색체수가 66개(87.2%)로 나타냈는데, 17쌍의 metacentric 또는 submetacentric, 16쌍의 acrocentric 또는 telocentric 염색체로 구성되었다. For the cytogenetic analysis in rainbow trout and masu salmon genetic analysis was performed. The model diploid chromosome numbers of rainbow trout were 60(48.6%),61(20.7%) and the karyotype consisted of 22 pairs of meta-, submetacentrics and 8 pairs of subtelo-, acrocentrics. The other chromosomal karyotype (2n=61) consisted of 43 of meta-, submetacentrics and 9 pairs of submetacentric -, acrocentrics. The Chromosome number of masu salmon was 66(87.2%) and the karyotype consisted of17 pairs of meta-, submetacentrics and 16 pairs of acrocentrics, telocentrics.
Han Hyon-Sob,Jang In-Kwon,Jun Je-Cheon,Kim Jong-Hwa,Park Young-Je The Korean Society of Fisheries and Aquatic Scienc 2006 Fisheries and Aquatic Sciences Vol.9 No.2
We evaluated the utility of applying isozyme analysis and two tagging methods, visible implant fluorescent elastomer (VIE) injection and uropod-cutting, to monitor the effects of releasing nursery-reared fleshy prawn (Fenneropenaeus chinensis) into natural habitat in Korea. One hundred thousand farmed prawns (70 mm long) were tagged by clipping off the outer left uropod and injecting them with VIE. This marked seed population was released at Muchangpo, Korea, on 11 and 19 July 2002. Two months later, total catch and catch per unit effort (CPUE) at three locations (Hongwon, Muchangpo, and Anmyundo) were determined. Total catch and CPUE increased nearly 18% over the previous year in Hongwon and Muchangpo. The mixing rate, estimated by uropod regeneration pattern, was 0.33% at Hongwon, 0.53% at Muchangpo, and 0.21% at Anmyundo. The recapture rate was about 3.5%. Isozyme analysis confirmed that the mixing rate was highest at Muchangpo. Moreover, fleshy prawns from Muchangpo were genetically most related to the seed population, indicating that the released prawns had largely remained near the released site. We also confirmed that isozyme genes are valuable as genetic markers for qualitative analyses of a released seed population.
Genetic Structure in Wild Populations of Ayu Plecoglossus altivelis in Korea and Japan
Han, Hyon-Sob,Taniguchi, Nobuhiko,Lee, Jong-Ha,Yoon, Moon-Geun The Korean Society of Fisheries and Aquatic Scienc 2011 Fisheries and Aquatic Sciences Vol.14 No.4
We investigated the genetic structure of Korean and Japanese ayu Plecoglossus altivelis populations by examining 669 individuals from 14 populations using three microsatellite loci. Genetic variation did not differ significantly among the populations examined in terms of allelic number and heterozygosity. Korean populations were genetically close to each other, implying that persistent gene flow has occurred in these populations. This suggests that eastern populations in Korea form a single large population and all of the Korean populations are distinct from the Japanese populations. Pairwise population $F_{ST}$ estimates, principal component analyses, and a neighbor-joining tree showed that genetic separation between the southern and pooled eastern coast populations was probably influenced by restricted gene flow. Hierarchical analysis of molecular variance (AMOVA) revealed a weak but significant genetic structure among three ayu groups (eastern and southern coasts of Korea and the Japan coast), and no genetic variation within groups. The estimated genetic population structure and potential applications of microsatellite markers may aid in the proper management of ayu populations.
Han, Hyon-Sob,Nam, Bo-Hye,Kang, Jung-Ha,Kim, Yi-Kyoung,Jee, Young-Ju,Hur, Young-Baek,Yoon, Moon-Geun The Korean Society of Fisheries and Aquatic Scienc 2012 Fisheries and Aquatic Sciences Vol.15 No.2
We used nine microsatellite DNA markers to estimate genetic variation among wild and cultured populations of the sea squirt Halocynthia roretzi. The loci were polymorphic, with 6-32 alleles, and allelic richness ranged from 6.0 to 26.1 in each population. The wild and the cultured populations had similar mean heterozygosities ($H_O$ and $H_E$), allele numbers, and allelic richness. One cultured population with softness syndrome had a lower mean in the observed heterozygosity ($H_O$ = 0.57) and higher mean inbreeding coefficient ($F_{IS}$ = 0.261) than any other populations. This suggests that the loss of genetic variation in the diseased population might be due to increased inbreeding. A neighbor-joining tree and pairwise population estimates of $F_{ST}$ showed moderate genetic differentiation between the wild and the cultured populations. Additionally, the softness syndrome population was genetically divergent from wild populations, but it was genetically close to the cultured populations.
HAN, HYON-SOB,NAM, BO-HYE,KANG, JUNG-HA,CHOI, TAE-JIN,KIM, WOO-JIN,HUR, YOUNG-BAEK,YOON, MOONGEUN Blackwell Publishing Ltd 2009 Molecular ecology resources Vol.9 No.2
<P>Abstract</P><P>The sea squirt <I>Halocynthia roretzi</I> is an important marine food resource species that is found in the waters around Korea. We describe the isolation and characterization of 13 new polymorphic microsatellite loci in 96 sea squirt samples that were collected from the marine environment of Samcheok on the east coast of Korea. The number of alleles that were observed for each locus ranged from six to 32, and the value of expected and observed heterozygosities was 0.504–0.922 and 0.396–0.813, respectively. These markers will be useful tools for future population studies.</P>
Han Hyon-Sob 한국발생생물학회 2000 발생과 생식 Vol.4 No.2
본 연구는 은어의 clone을 생산하여 생리적 형질에 대한 유전적 특성을 조사하고 또 clone의 유전율을 추정했다. 성숙한 완전 동형접합형 자성발생 2배체(난할형 2배체)에서 채란한 후 자성발생을 반복하여 4계통의 clone을 생산하였으며 부화 전부터 같은 수조에 혼합하여 사육하였다. 10개월간 사육한 후 사육수조의 수심을 낮추었을 때의 스트레스가 clone의 혈액성상과 유전율에 미치는 영향에 대해서 조사했다. 생산된 각 계통의 clone은 실험에 사 Four clonal lines of ayu, Plecoglossus altivelis, were produced through gynogenesis, mixed before hatching and reared communally. After 10 months, a randomly taken sample was subjected to a standardized shallow water stressor. Hematocrit, hemoglobin, red blood cells count (RBC) and mean corpuscular volume (MCV) were obtained from stressed and non-stressed fish. DNA fingerprinting was used to confirm the clonal nature of the organisms and to identified the clonal line to which each fish belonged. 1 observed significant differences between clona] lines mostly in the hematocrit and MCV measured under no-stress conditions. Such differences are suggested to represent mainly genetic variance, on account of the common environment provided to all the experimental groups. The stress response ratio was lower than expected, mainly due to some unexpectedly high non-stress values. Heritability values (h) were medium to high for the no-stress measurements (mean 0.238) and very low or zero for the stressed groups'traits (excepting one high value of 0.484). 1 conclude that the use of communally reared clonal lines represents a good tool for the characterization of the physiological traits, thus allowing for their utilization as genetic selection criteria.
Han, Hyon-Sob,Jin, Deuk-Hee,Lee, Jong-Kwan The Korean Society of Fisheries and Aquatic Scienc 2003 韓國養殖學會誌 Vol.16 No.2
Genetic variability and population structure of 11 natural ayu, Plecoglossus altivelis populations and one hatchery stock were assessed by starch gel electrophoretic analysis with 10 enzyme coding loci. Three loci were polymorphic (lower than 0.95 in major allele frequency) in natural populations,2 loci in hatchery stock. The average number of alleles per locus was 1.38. Observed heterozygosities ranged from 0.0235 to 0.088 (0.055 on the average) in natural population while 0.0925 in hatchery stock. The genetic distance among natural populations measured 0.000047-0.005407 and no significant differentiation was observed among them. On the other hand, a signifcant genetic distance was found between natural populations and the hatchery stock with measuring 0.002032-0.O08605. The results in this study suggest that the hatchery stock has diverged from natural populations, and also that careful to maintain sustainable and effective population size (parents number) should be made.