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- W4313531390 abstract "In order to assess the overall progress of our long-term selective breeding program and quantify the effects of inbreeding on production traits in selected line of Pacific oyster Crassostrea gigas, we systematic analyzed the growth, survival and yield of selected, inbreeding and wild populations for 440 days in northern China. During the larval stage, selected line exhibited high superiority in both survival rate and shell height. Compared with wild population, the shell height and survival rate of selected line increased by 19.10% and 57.15% at day 20, respectively. Meanwhile, the shell height and individual weight of the selected line were significantly higher than wild population at whole grow-out stage. Notably, the cumulative survival rate of selected line increased by 71.35% compared with wild population at harvest. Additionally, the final yield of selected line increased by 157.98% compared with wild population and it would be of great benefits to oyster industry. In this study, the effects of inbreeding on shell height were not significant (P > 0.05) at whole larvae stage, ranged from −0.68% to −5.01%. On the contrary, there were significant inbreeding depression (−5.14% to −22.46%) on larvae survival and the estimated coefficient were − 2.06% to −8.98% per 10% increase of inbreeding coefficient of F. During grow-out stage, inbreeding depression on survival were not significant (P > 0.05), ranged from −0.83% to −5.04%. On the contrary, there were significant (P < 0.05) inbreeding depression on growth traits and tend to increase with age. The estimated inbreeding depression coefficient of individual weight ranged from −1.54% to −5.91% per 10% increase of inbreeding coefficient of F, which was higher than the estimate obtained for shell height (−0.64% to −5.52%). For yield, the estimated inbreeding depression coefficient was −8.37% per 10% increase of inbreeding coefficient of F (P < 0.05). The above results indicate that substantial genetic progress was achieved in our selective breeding program, and it is necessary to maintain pedigree records to avoid the harmful effects of inbreeding depression." @default.
- W4313531390 created "2023-01-06" @default.
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- W4313531390 date "2023-03-01" @default.
- W4313531390 modified "2023-10-16" @default.
- W4313531390 title "Comparative study of growth, survival and yield of selected, inbreeding and wild populations in Pacific oysters" @default.
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- W4313531390 doi "https://doi.org/10.1016/j.aquaculture.2023.739232" @default.
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