Phenotypic and genetic parameters of body size traits in Atlantic salmon Salmo Salar L.
Phenotypic and genetic parameters of body size traits in Atlantic salmon Salmo Salar L.
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大西洋鲑鱼 Salmo Salar L 体型特征的表型和遗传参数。
DOI：
10.1111/j.1365-2109.1995.tb00882.x
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
T. Refstie
中科院分区：
文献类型：
--
作者：
M. Rye;T. Refstie
对在海水中饲养两年的两年级大西洋鲑鱼 Salmo salar L. 的数据进行了分析。记录是由 58 头公牛和 171 头母马分级交配的 1271 个后代获得的。去内脏和去内脏体重、体长、体围和体况因素（全身性状）的父系遗传力为中高（0.30-0.38）。肉排高度和宽度以及腹壁平均厚度的相应估计范围为 0.23 至 0.27。后者的测量是在背鳍前面的横截面上进行的。从母体方差部分得出的遗传力估计值总体上与父系估计值相对应，表明不存在全同胞共有的非加性遗传和环境影响。估计性状之间的表型和遗传相关性均为正相关。关于商业选择计划的可能育种目标，去内脏和去内脏体重与条件因子（rG=0.36-0.37）的遗传相关性被认为是不利的。结果揭示了性别和性成熟状态对生长的重大影响。在评估增长或与增长相关的数据时，需要强调对这些影响进行适当调整。
Data on two year classes of Atlantic salmon, Salmo salar L., reared for 2 years in sea water, were analysed. Records were obtained on 1271 offspring of 58 sires and 171 dams mated hierarchically. Medium-high sire heritabilities (0.30-0.38) were found for ungutted and gutted body weights, body length, body circumference and condition factor (whole-body traits). Corresponding estimates for height and width of cutlet and average thickness of the abdominal wall ranged from 0.23 to 0.27. The latter measurements were made on a transversal section anterior to the dorsal fin. Heritability estimates derived from the dam component of variance corresponded in general to the sire estimates, indicating the absence of non-additive genetic and environmental effects common to full sibs. Estimated phenotypic and genetic correlations among the traits were all positive. With regard to the likely breeding goal of a commercial selection programme, the genetic correlations of ungutted and gutted body weights with condition factor (rG=0.36-0.37) were judged unfavourable. The results revealed substantial impact of sex and sexual maturation status on growth. The need is stressed for proper adjustment for these effects when assessing growth or growth-related data.