Comparative study on growth performance and morphological characteristics of the meio- and mito-gynogenesis olive flounder (Paralichthys olivaceus)
Comparative study on growth performance and morphological characteristics of the meio- and mito-gynogenesis olive flounder (Paralichthys olivaceus)
复制标题
减数雌核发育与有丝分裂橄榄鲽（Paralichthys olivaceus）生长性能及形态特征的比较研究
DOI：
10.1016/j.aquaculture.2021.736387
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发表时间：
2021
期刊：
影响因子：
4.5
通讯作者：
Feng You
中科院分区：
文献类型：
--
作者：
Qiaowan Wu;Zhihao Wu;Lijuan Wang;Yunliang Lu;Weijia Bi;Dongdong Zhou;Ling Wang;Zhuangzhuang Peng;Feng You
雌核发育诱导等染色体操作是鱼类快速获得高近交系数的有效方法，对遗传育种具有重要意义。基于不同的诱导方案，有两种类型的雌核发育，减数雌核发育（MEG）和有丝分裂雌核发育（MEG），它们保留了高水平的杂合性或理论上的纯合性。到目前为止，很少有人知道这两个雌核发育之间的生长和形态差异。本文对重要的海水养殖鱼类-橄榄牙鲆的MEG和肌细胞的生长和形态特征进行了研究。结果表明，孵化后3、6、9、12、18和24月龄的MEG和Escherichia coli的生长趋势与对照组相似，生长曲线的拐点均在12 mph处。在12 ~ 18 mph范围内均表现为快速增长（P< 0.05）。总体而言，MEG鱼表现出与对照二倍体相似的生长，而在一定程度上，尽管它们的生长有很大的差异，但长鳍鱼的生长表现更好。不同群体间的体重比生长率（SGRw）差异表明其异速生长。在形态特征上，不同砧木表现出不同的形态。与对照浆料相比，MEG浆料的坯体形状更细、更长，而中间浆料的坯体形状更圆润。框架数据表明，主成分分析提取的两个主要主成分的累积贡献率分别为79.75%和78.88%，在12英里每小时的混合和MEG股票。并且该浆料的形状分散度较高。对形态参数与体重的相关和回归分析表明，形态参数与增重也存在相关性，与体重相关的关键特征值主要集中在沿着头尾轴方向。结果表明，MEG和异黄酮在生长特性上均表现正常甚至有一定优势，可用于比目鱼养殖。
Chromosome manipulation, such as gynogenetic induction, is an effective method in fish to quickly obtain high inbreeding coefficient which is useful for genetic breeding. Based on different induction protocols, there are two kinds of gynogenesis, meio-gynogenesis (MEG) and mito-gynogenesis (MIG), which retain high level of heterozygosity or theoretically homozygous. Until now, little is known about the growth and morphological differences between these two gynogenesis. The present study analyzed the growth and morphological characteristics of the MEG and MIG stocks in the olive flounderParalichthys olivaceus, an important maricultured fish. The results showed that the growth trends of both the MEG and MIG stocks at 3, 6, 9, 12, 18, and 24 months post hatching (mph) were similar to the control stock, and the inflection point of growth curve was at 12 mph. They all presented fast growth from 12 to 18 mph (P< 0.05). Overall, the MEG fish showed a similar growth with the control diploids, while the MIG fish had a better growth performance to some extent although their growth was quite different. The difference of the specific growth rate in body weight (SGRw) among different stocks indicated their allometric growth. In terms of the morphological characteristics, different stocks showed different shapes. Compared with the control stock, the body shape of the MEG stock is thinner and longer, while that of the MIG stock is mellower. The frame data indicated that the cumulative contributive proportions of two main principal components extracted with principal component analysis were 79.75% and 78.88% in the MIG and MEG stocks at 12 mph, respectively. And the shape dispersion of the MIG stock was higher. Based on correlation and regression analyses of the morphological parameters and body weight, the morphological data were also shown to be correlated with the weight gain, and the key characteristic values related to the body weight among the flounder stocks concentrated mainly along the direction of head-tail axis. The results revealed that both the MEG and MIG ones have normal or even some advantages on their growth characteristics, which could be used for the flounder breeding.