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논문 기본 정보

자료유형
학술저널
저자정보
Qun Jiang (Yangzhou University) Qi Li (Ocean University of China) Hong Yu (Ocean University of China) Lingfeng Kong (Ocean University of China)
저널정보
한국유전학회 Genes & Genomics Genes & Genomics Vol.39 No.9
발행연도
2017.1
수록면
997 - 1,006 (10page)

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Partial or complete sterility is an obvious feature in triploid Pacific oyster (Crassostrea gigas) which contributes to improving rearing performances. Despite the significance of sterility, the molecular mechanism behind it remains elusive and related research was limited. This study focused on six reproduction-related genes and compared their different behavior in gene expression and DNA methylation pattern between triploid and diploid oysters in order to provide more molecular information. The gonadal development of triploid oyster was examined by histology before molecular analysis. Gametogenesis disturbance was observed in triploid oysters at different development stages (stage II and III) with more serious impairment in females. QPCR showed significant gene expression difference between diploid and triploid in two genes: putative Vg and cgER. Gene expression of putative Vg was delayed in triploids while for cgER triploid oyster showed higher expression and the difference was significant at stage III. DNA methylation pattern of these two genes were further investigated by bisulfite sequencing. Between diploid and triploid oysters, no difference was observed in total methylation level but some individual loci showed different patterns: significantly high methylation rate of loci 2284 in cgER was observed in triploid oyster which has a higher expression of this gene. This study indicated that putative Vg and cgER might play a role in partial sterile in triploid C. gigas. Gene expression could be regulated by the methylation pattern at specific individual locus, which deserves equivalent attention as well as total DNA methylation level.

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참고문헌 (32)

참고문헌 신청
Allen SK / 1986 / Performance of triploid Pacific oysters, Crassostrea gigas (Thunberg). I. Survival, growth, glycogen content, and sexual maturation in yearlings / J Exp Mar Biol Ecol 102:197~208 google schola Berthelin CH / 2001 / Storage and reproductive strategy in Crassostrea gigas from two different growing areas (Normandy and the Atlantic coast, France) / Invertebr Reprod Dev 40:79~86 google schola Chen ZJ / 2007 / Genetic and epigenetic mechanisms for gene expression and phenotypic variation in plant polyploids / Annu Rev Plant Biol 58:377~406 google schola Dheilly NM / 2014 / Transcriptomic profiling of gametogenesis in triploid Pacific oysters Crassostrea gigas: towards an understanding of partial sterility associated with triploidy / PLOS ONE 9:e112094 google schola Ding Y / 2013 / DNA methylation status of cyp17-II gene correlated with its expression pattern and reproductive endocrinology during ovarian development stages of Japanese flounder (Paralichthys olivaceus) / Gene 527:82~88 google schola

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