• Title/Summary/Keyword: 유전양식

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Genetic Relationship of the Five Venerid Clams유 (Bivalvia, Veneridae) in Korea (한국산 백합과 5종의 유전적 유연관계)

  • 정형택;김정;신종암;서호영;최상덕
    • Journal of Aquaculture
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    • v.17 no.4
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    • pp.251-257
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    • 2004

  • The random amplified polymorphic DNAs (RAPD) technique was used to characterize the genetic relationship of five species from in the family of Veneridae which is one of the commercially important clam family in Korea. The veneride clams' DNA were extracted from adductor muscular by the proteinase K-phenol method. Among 20 primers, 15 unit primers were amplified and produced at least, 2 or 3 from the top band. Genetic similarity between the purplish washington, Saxidomus purpuratus and the hard clam, Meretrix lusoria was the highest (0.87); the lowest genetic similarity (0.46) was formed between the little clam, Ruditapes philppinarum and the purplish washington, S. purpuratus. The genetic relationship between the venus clam, Protothaca jedoensis and the little clam, R. philppinarum was a closer than those between others. These results may indicate that the method of artificial seeding production of P. jedoensis for the propagation of resources can be focused on R. philppinarum.

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Genetic Variability of Farmed Olive Flounder (Paralichthys olivaceus) Populations Managed with no Consideration of Genetic Diversity (유전적 다양성이 고려되지 않은 어미 관리에 의한 양식 넙치(Paralichthys olivaceus)의 유전적 다양성의 변화)

  • Noh, Jae Koo;Kim, Hyun Chul;Park, Choul Ji;Lee, Jeong-Ho;Kim, Jong-Hyun;Lee, Mi-Sug;Kim, Woo-Jin;Kim, Kyung-Kil;Myeong, Jeong-In
    • Korean Journal of Ichthyology
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    • v.20 no.4
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    • pp.248-254
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    • 2008

  • Olive flounder (Paralichthys olivaceus) is one of the most popular farmed fish in Korea. Genetic variability of the fish was investigated by means of microsatellite DNA markers. All of the 8 microsatellite loci were analyzed in this study. For the confirmation of genetic variation during a shift in generation, microsatellite variability was compared within the same hatchery strains but produced in different spawning years. When genetic variability of farmed flounders produced in 2006 and 2007 was compared with that of 2003, a marked reduction of genetic variability was observed in the 2006 and 2007 populations. Mean number of alleles per locus and expected mean heterozygosity decreased from 9.75 and 0.796 (in 2003 population) to 7.78 and 0.785 (in 2006 population), respectively. Moreover, we have observed the distortion of allele frequency. These results show that reduced genetic variability of farmed olive flounder in processed generation has lower numbers of alleles and genetic variability than these of wild fish. Our results suggest that to have a sustainable aquaculture of this species, there is need for scientific broodstock management based on genetic variation and more intensive breeding practices to improve genetic diversity and to avoid detrimental inbreeding effects.

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Inheritance of Resistance to Bacterial Spot and to Phytophthora Blight in Pepper (고추의 더뎅이병(病) 저항성(抵抗性)과 역병(疫病) 저항성(抵抗性)의 유전(遺傳))

  • Kim, Byung Soo;Kwon, Young Seok;Shon, Eun Young
    • Current Research on Agriculture and Life Sciences
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    • v.9
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    • pp.127-133
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    • 1991

  • PI201232, a pepper line resistant to Phytophthora capsici Leonian, was crossed with PI2713222 and P1163192, resistant to Xanthomonas campestTis pv. vesicatoria (Doidge) Dye and inheritance of the resistance to each disease and genetic relationship between the two disease resistances was studied. Non-hypersensitive resistance to race 3 of X. c. pv. vesicatoria of PI271322 was inherited in a quantitative mode. Resitance to P. capsici of PI201232 was inherited in a mode close to two dominant alleles. Hypersensitive resistance to race 1 of X. c. pv. vesicatoria of PI271322 was inherited in a mode of single dominant allele. PI 163192 was consistently resistant to both race 1 and race 3 of X c. pv. vesicatoria and the resistance was inherited in a quantitative mode with high dominance effect. Resistance to X. c. pv. vesicatoria was inherited independently from resistance to P. capsici.

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넙치(Paralichthys olivaceus) 정액의 냉동보존과 보존정자를 이용한 치어 생산

  • 장윤정;장영진;이정용
    • Proceedings of the Korean Society of Fisheries Technology Conference
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    • 2001.10a
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    • pp.283-284
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    • 2001

  • 넙치(Paralichthys olivaceus)는 1986년부터 본격적으로 양식되기 시작한 어종으로 현재 국내 어류 양식에서 차지하는 비율이 가장 높다. 그러나, 한정된 친어에서 생산된 수정란의 사용으로 유전적 다양성이 감소하고 있어, 우량한 형질의 유전자를 가진 친어를 이용하여 유전적 다양성을 유지하는 일이 필요하다. 또한, 일본에서 수입된 수정란으로 생산된 치어가 우리나라 연안에 방류됨으로써, 자연 상태에서 국산 넙치와의 잡종이 발생하고 있어 국산 넙치의 종보존이 시급한 실정이다. (중략)

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