| Wang Xin'an,Ma Aijun.Dynamic genetic analysis for body weight and main length ratio in turbot Scophthalmus maximus[J].Acta Oceanologica Sinica,2020,39(2):22-27 |
| 大菱鲆体重和主要体型比率性状的遗传动态分析 |
| Dynamic genetic analysis for body weight and main length ratio in turbot Scophthalmus maximus |
| 投稿时间：2018-05-21 |
| DOI：10.1007/s13131-020-1551-y |
| 中文关键词: 大菱鲆 遗传动态分析 体重 主要体型比率 遗传力 遗传相关 |
| 英文关键词:turbot dynamic genetic analysis body weight main length ratio heritability genetic correlation |
| 基金项目:The Earmarked Fund for Modern Agro-Industry Technology Research System under contract No. CARS-47-G01; the AoShan Talents Cultivation Program supported by Qingdao National Laboratory for Marine Science and Technology under contract No. 2017ASTCP-OS04; the Agricultural Fine Breed Project of Shandong under contract No. 2016LZGC031; the Chinese Academy of Fishery Sciences Basal Research Fund under contract No. 2016HY-JC0302; the National Key Research and Development Program under contract No. 2018YFD0900102. |
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| 中文摘要: |
| 本研究的目的是通过估计大菱鲆体宽/体长（BW/BL）比率性状以及体重（BWT）性状在不同生长发育期的遗传参数进行遗传动态分析，进而阐明这两种性状的遗传机制。从3到27月龄，以3个月为间隔，测量每一实验鱼的体宽、体长和体重；计算不同发育期的BW/BL。采用两性状动物模型对BW/BL性状和BWT性状进行遗传评估。结果显示，BWT性状和BWT性状遗传力的波动范围分别是0.216 8-0.314 8和0.270 2-0.347 9，为中等遗传力。除3月龄外，BW/BL性状的遗传力均低于BWT性状遗传力。在整个测量期，从总体上看，BWT性状和BWT性状的遗传相关呈下降趋势。同一统计期，遗传相关高于对应的表型相关。当前结果表明，BW/BL比率性状可作为大菱鲆快速生长的表型标记；BW/BL比率性状和BWT性状能通过选择育种同时得到改良。 |
| 英文摘要: |
| The objective of this study was to estimate genetic parameters of body width (BW) to body length (BL) ratio (BW/BL) and of body weight traits (BWT) in turbot, and to elucidate the genetic mechanism of the two traits during ontogeny by dynamic genetic analysis. From 3 to 27 months, BW, BL and BWT of each communally stocked fish were measured every 3 months. The BW/BL ratio was measured at different sampling ages. A two-trait animal model was used for genetic evaluation of traits. The results showed that the heritability values of BW/BL ratio ranged from 0.216 8 to 0.314 8, corresponding to moderate heritability. The BWT heritability values ranged from 0.270 2 to 0.347 9 corresponding to moderate heritability. The heritability of BW/BL ratio was lower than that of BWT, except at 3 months of age. Genetic correlation between BW/BL ratio and BWT decreased throughout the measurement period. Genetic correlations were higher than the phenotypic correlations. The current results for estimating genetic parameters demonstrate that the BW/BL ratio could be used as a phenotypic marker of fast-growing turbot, and the BW/BL ratio and BWT could be improved simultaneously through selective breeding. |
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