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Induction of a New Hybrid between Haliotis gigantea Gmelin (♀) and H. discus discus Reeve (♂)
안혜석,지영주,한석중,김봉래,김은미,박인석 한국유전학회 2007 Genes & Genomics Vol.29 No.2
Viable interspecific hybrids between the abalone Haliotis gigantea Gmelin and Haliotis discus discus Reeve were produced by artificialy inseminating H. gigantea egs with sperm. Past atempts to perform this reciprocal cross have never ben succesful. The fertilizing ability and hatchability of the hybrids were compared to those of the parental crosses. The hybrid had higher initial mortality at 100 days post-hatch. The shell length growth rate and body weight of the hybrids were significantly higher than those of the P< 0.05). The hybrid abalone had a chromosome number of 2n =36 and its idiogram was similar to those of the parental species. The hybrid possesed a cellular DNA content of 3.33 pg cell-1, which was similar to those of the parental species. At the age of 4 years, hybrid individuals of both sexes had wel-developed gonads similar to those of and H. discus discus individuals of the same age. In order to understand the reproductive ability of the hybrid abalone, further research is needed on the formation of F1 hybrid abalone using sperm and egg originating from the hybrids.
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박인석,허준욱,임수연,설동원,허우준,박민욱,안혜석,김은미,한석정 한국유전학회 2008 Genes & Genomics Vol.30 No.2
Morphometric traits, percent shell weight, percent cavity volume and condition index of 4-year-old induced hybrid abalone from female Haliotis gigantea Gmelin and male Haliotis discus discus Reeve were compared to those of the parental species. Apex height/shell height of the induced hybrid abalone was in between the average height of the parental species. The induced hybrid abalone shared three traits with the paternal species and two with the maternal species. After 4 years of growth, the condition index of the induced hybrids weresignificantly higher than that of either parental species ( P< 0.05). Generally, induced hybrid abalone displayed an external morphology that was intermediate between the representative of both parental species. Haliotis gigantea and the induced hybrids had four respiratory pores, while H. discus discus had five. Morphometric traits, percent shell weight, percent cavity volume and condition index of 4-year-old induced hybrid abalone from female Haliotis gigantea Gmelin and male Haliotis discus discus Reeve were compared to those of the parental species. Apex height/shell height of the induced hybrid abalone was in between the average height of the parental species. The induced hybrid abalone shared three traits with the paternal species and two with the maternal species. After 4 years of growth, the condition index of the induced hybrids weresignificantly higher than that of either parental species ( P< 0.05). Generally, induced hybrid abalone displayed an external morphology that was intermediate between the representative of both parental species. Haliotis gigantea and the induced hybrids had four respiratory pores, while H. discus discus had five.
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현영세,송하연,우지영,오수민,김민섭,안혜석 한국유전학회 2017 Genes & Genomics Vol.39 No.2
A small and air-breathing snail, Ellobium chinense (Ellobiidae), is a vulnerable species by International Union for Conservation of Nature (IUCN). To protect and manage habitat and population of E. chinense, microsatellite markers were developed using 454 pyrosequencing and 20 polymorphic microsatellite markers were identified. A total of 146,704 sequences containing a minimum of four repeat motifs (mean, 631 base pairs) were identified from 499,505 reads. Among 80 loci containing more than nine repeat units, 34 primer sets (42.5 %) produced strong PCR products, of which 20 were polymorphic among 48 samples of E. chinense. All loci exhibited high genetic variability, with an average of 18.9 alleles per locus, and the mean observed and expected heterozygosities were 0.65 and 0.90, respectively. In addition, cross-amplification was tested for all 20 loci in the same family species, Melampus sincaporensis. None of the primer pairs resulted in effective amplification, which might be due to their high mutation rates. Our work demonstrated the utility of next-generation 454 sequencing as a method for the rapid and cost-effective identification of microsatellites. The high degree of polymorphism exhibited by the 20 newly developed microsatellites will be useful in future conservation genetic studies of this species.
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