Growth performance and biochemical composition of the oysters Crassostrea sikamea, Crassostrea angulata and their hybrids in southern China

文献类型： 外文期刊

第一作者： Yan, Lulu

作者： Yan, Lulu;Wang, Zhaoping;Yu, Ruihai;Su, Jiaqi;Zhang, Yuehuan;Yan, Xiwu

作者机构：

关键词： Crassostrea angulata;Crassostrea sikamea;heterosis;interspecific hybridization

期刊名称：AQUACULTURE RESEARCH （ 影响因子：2.082； 五年影响因子：2.415 ）

ISSN： 1355-557X

年卷期： 2018 年 49 卷 2 期

页码：

收录情况： SCI

摘要： The Kumamoto oyster (Crassostrea sikamea) and the Portuguese oyster (C.angulata) are important aquaculture species which naturally coexist along the southern coast of China. To understand the potential feasibility of hybridization between the two species, we conducted two-by-two factorial cross-experiments in Beihai (Guangxi province), and also compared the survival and growth of the hybrids to that of the two parental progenies during the grow-out period from July 2014 to July 2015. Genetic analysis confirmed that the hybrid spats were true hybrids. Additionally, the biochemical composition of the 1-year-old oyster progenies was determined. In July 2015, the mean shell height of the hybrids was 42.98 +/- 6.29mm, which was higher than that of the Kumamoto oyster progeny. The cumulative survival rate of the hybrids was 26.37 +/- 1.32%, which was higher than that of the progeny of the Portuguese oyster. Mean lipid content of the hybrids was 13.65 +/- 1.63% of dry weight, which showed obvious heterosis compared to those of the two parental progenies. Observation of gonads revealed that all hybrids were completely fertile. Furthermore, relative expression of the lipid homeostasis genes, SREBP (sterol regulatory element-binding proteins), PPAR (peroxisome proliferator-activated receptor) and INSIG (insulin-induced gene) were found to vary between parental progenies and the hybrids, thus providing a possible reason for difference in the lipid contents of these experimental groups. Overall, the hybrids were viable, rich in lipid and completely fertile and thus could serve as a promising aquaculture stock for oyster breeding in southern China.

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