• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Oceanographic Literature Review >Genetics of growth and survival under chronic heat stress and trade-offs with growth- and robustness-related traits in rainbow trout
【24h】

Genetics of growth and survival under chronic heat stress and trade-offs with growth- and robustness-related traits in rainbow trout

机译：慢性热胁迫下生长和生存的遗传和虹鳟鱼生长和鲁棒性相关性状的权衡

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Artificial selection can be advantageous for breeding fish that are better adapted to temperature changes induced by climate change. Selecting fish with better growth performance and survival under long term thermal stress would require an understanding of the level of additive genetic variation for these traits. Moreover, disentangling the genetic co-variation between growth- and robustness-related traits is key to understand potential antagonisms between selection for an increased performance and survivability. Thus, this study aimed at: i) assessing levels of genetic variation for growth and survival under chronic heat stress, and ii) evaluating the genetic relationship between these two traits and a broad range of growth- and robustness-related traits to identify potential trade-offs in rainbow trout. Phenotypic and pedigree records (n = 65,298 animals) from a rainbow trout breeding population were used. Growth and survival under chronic thermal stress were defined as the final body weight (FWHT) and days to death (TSR), after the experimental chronic exposure to high temperature (between 18 and 22 °C). Other growth-related traits analyzed here were: body weight at smolt stage (SW), harvest weight (HW), weight at processing plant (WPP), fillet weight (FW), weight of the eviscerated fish (GUW) and body weight at low temperature (FWLT). Robustness-related traits evaluated here were: resistance against Piscirickettsia salmonis (PSR) and Flavobacterium psychrophilum (FPR), and susceptibility to Cali-gus rogercresseyi (CS). The heritabilites estimated were: FWHT = 0.41 ± 0.14; TSR = 0.13 + 0.05; SW = 0.54 ± 0.01; HW = 0.63 ± 0.01; WPP = 0.19 ± 0.02; FW = 0.03 + 0.03; GUW = 0.18 ± 0.02; FWLT = 0.59 + 0.17; FPR = 0.35 ± 0.05; PSR = 0.30 ± 0.05; and CS 0.08 ± 0.02. In general, strong compensations were identified between the robustness- and growth- related traits with genetic correlations that ranged from -0.28 to -0.98, except for resistance to F. psychrophilum and growth-related traits, which showed correlation values from 0.28 to 0.46. Genetic improvement for growth and survival under chronic upper thermal exposure is feasible. Compensations between growth- and robustness- related traits have to be accounted for when simultaneously including performance and disease resistance traits in the breeding objective.
机译：人工选择对于繁殖的鱼类可以是有利的，这些鱼类更好地适应气候变化诱导的温度变化。在长期热应力下选择具有更好的生长性能和生存的鱼将需要了解这些性状的添加剂遗传变异水平。此外，解解生长和鲁棒性相关性状之间的遗传协同变异是理解选择之间的潜在对抗的关键，以增加性能和生存能力。因此，本研究旨在：i）评估慢性热应激下生长和生存率的遗传变异水平，II）评估这两个性状与广泛的生长和鲁棒性相关性的遗传关系，以确定潜在贸易在彩虹鳟鱼中的-offs。使用来自虹鳟鱼育种人群的表型和谱系记录（n = 65,298只动物）。在实验慢性暴露于高温（18至22℃之间，慢性热应激下的生长和存活率定义为最终体重（FWHT）和死亡（TSR）的日子（TSR）。这里分析的其他与生长相关的性状是：在防弹阶段（SW），收获重量（HW），加工厂（WPP）的重量，圆角重量（FW），重量的鱼（GUW）和体重低温（FWLT）。这里评估的鲁棒性相关的特征是：对Piscirickettsia Salmonis（PSR）和Flavobacterium心理（FPR）的抵抗力，以及对Cali-Gus Rogercresseyi（CS）的易感性。估计的赫塔基特是：FWHT = 0.41±0.14; TSR = 0.13 + 0.05; SW = 0.54±0.01; HW = 0.63±0.01; WPP = 0.19±0.02; FW = 0.03 + 0.03; GUW = 0.18±0.02; FWLT = 0.59 + 0.17; FPR = 0.35±0.05; PSR = 0.30±0.05;和CS 0.08±0.02。通常，在鲁棒性和生长相关性与生长相关性之间鉴定出强的补偿，其遗传相关性从-0.28至-0.98，除了对F.心理学和生长相关的特征外，表现出0.28至0.46的相关值。慢性上热暴露下生长和生存率的遗传改善是可行的。同时包括在繁殖目标中的性能和疾病性性状的同时存在增长和鲁棒性相关性状的补偿。

著录项

  • 来源
    《Oceanographic Literature Review》 |2020年第10期|2281-2281|共1页
  • 作者

    J. Gallardo- Hidalgo; A. Barra; G.M. Yoshida; J.M. Yaiiez;

  • 作者单位

    Facultad de Ciencias Veterinarias y Pec-uarias Universidad de Chile La Pintana Santiago Santa Rosa 11735 Chile;

    Facultad de Ciencias Veterinarias y Pec-uarias Universidad de Chile La Pintana Santiago Santa Rosa 11735 Chile;

    Facultad de Ciencias Veterinarias y Pec-uarias Universidad de Chile La Pintana Santiago Santa Rosa 11735 Chile;

    Facultad de Ciencias Veterinarias y Pec-uarias Universidad de Chile La Pintana Santiago Santa Rosa 11735 Chile;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号