| Wang Xin'an,Ma Aijun. 2020. Dynamic genetic analysis for body weight and main length ratio in turbot Scophthalmus maximus. Acta Oceanologica Sinica, 39(2):22－27 |
| Dynamic genetic analysis for body weight and main length ratio in turbot Scophthalmus maximus |
| 大菱鲆体重和主要体型比率性状的遗传动态分析 |
| Received:May 21, 2018 |
| DOI：10.1007/s13131-020-1551-y |
| Key words:turbot dynamic genetic analysis body weight main length ratio heritability genetic correlation |
| 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 |
| 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. |
| Author Name | Affiliation | E-mail | | Wang Xin'an | Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences/Shandong Province Key Laboratory of Marines Fisheries Biotechnology and Genetic Breeding, Qingdao 266071, China
Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China | | | Ma Aijun | Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences/Shandong Province Key Laboratory of Marines Fisheries Biotechnology and Genetic Breeding, Qingdao 266071, China
Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China | maaj@ysfri.ac.cn |
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| Abstract: |
| 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. |
| 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。 |
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