Development of an Atlantic salmon (Salmo salar) genetic improvement program:: Genetic parameters of harvest body weight and carcass quality traits estimated with animal models
Development of an Atlantic salmon (Salmo salar) genetic improvement program:: Genetic parameters of harvest body weight and carcass quality traits estimated with animal models
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DOI：
10.1016/j.aquaculture.2005.02.030
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发表时间：
2005-06-30
期刊：
影响因子：
4.5
通讯作者：
Glebe, BD
中科院分区：
文献类型：
--
作者：
Quinton, CD;McMillan, I;Glebe, BD
大西洋鲑鱼亲鱼发展计划是研究人员和生产者的合作伙伴关系，旨在培育具有快速生长速度，早期性成熟发生率低和良好胴体质量的鲑鱼，用于加拿大大西洋地区的商业水产养殖。这些性状的遗传参数的估计是这一育种计划的发展中必不可少的一步。四年类大西洋鲑鱼生产，每个由48-93全同胞家庭。从这些家庭中的每一个标记的鱼被随机分配给几个生产者在商业条件下饲养。在收获时，在加工厂每年812-3471个个体中观察到内脏体重和性成熟水平。此外，颜色评分，虾青素，虾青素，脂肪和水分含量记录在472个未成熟的个人从一年班。用单性状和多性状动物模型估计遗传参数。体重、虾青素、黄质、色泽、脂肪和水分的遗传力均为中等（0.1-0.2），表明这些性状应受选择的影响。体重与类胡萝卜素色素、颜色和脂肪呈正相关。这些结果表明，直接选择重量可能有良好的间接反应，较高的颜色评分和色素沉着，但也不希望增加肉脂肪含量。因此，应使用适当加权的选择指数来选择亲鱼，以增加收获重量和肉着色，同时控制肉脂肪含量。(c)2005 Elsevier B. V.保留所有权利。
The Atlantic Salmon Broodstock Development Program is a partnership of researchers and producers that aims to breed salmon with an optimal combination of fast growth rate, low incidence of early sexual maturation, and good carcass quality for commercial aquaculture in Atlantic Canada. Estimation of genetic parameters for these traits is an essential step in the development of this breeding program. Four year classes of Atlantic salmon were produced, each consisting of 48-93 full-sib families. Marked fish from each of these families were randomly distributed to several producers to be raised under commercial conditions. At harvest, gutted body weights and sexual maturation level were observed in 812-3471 individuals per year class at processing plants. Additionally, colour score, astaxanthin, canthaxanthin, fat and moisture contents were recorded on 472 immature individuals from one year class. Genetic parameters were estimated with single- and multiple-trait animal models. Body weight, astaxanthin, canthaxanthin, colour, fat and moisture all exhibited moderate heritabilities (0.1-0.2), indicating that these traits should respond to selection. Positive genetic correlations were found between body weight and the carotenoid pigments, colour, and fat. These results indicate that direct selection for weight may have favourable indirect responses of higher colour scores and pigmentation but also an undesirable increase in flesh fat content. A properly weighted selection index should therefore be used to select broodstock for increased harvest weight and flesh colouration, while controlling flesh fat content. (c) 2005 Elsevier B.V. All rights reserved.