The March of the Beetles: Epistatic Components Dominate Divergence in Dispersal Tendency in Tribolium castaneum.
The March of the Beetles: Epistatic Components Dominate Divergence in Dispersal Tendency in Tribolium castaneum.
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甲虫的行军：上位性成分在赤拟谷盗扩散趋势中占主导地位。
DOI：
10.1093/jhered/esaa030
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发表时间：
2020-09-30
期刊：
影响因子：
--
通讯作者：
Blackmon H
中科院分区：
文献类型：
--
作者：
Ruckman SN;Blackmon H
性状的遗传基础很少是简单的。相反，大多数感兴趣的性状是多个基因共同作用决定表型的产物。对于行为特征来说尤其如此，比如分散。本文研究了红粉甲虫（Tribolium castaneum）扩散倾向的遗传结构。我们用人工选择的方法产生高或低扩散倾向的品系。我们的种群在第一代选择中反应迅速，几乎所有的重复中雄性的分散倾向都高于雌性。这些选择系被用来创建6个额外的系：F1和互交F1，以及4种类型的回交。我们利用交叉分析估计了复合遗传效应对株系间分散趋势差异的影响。我们发现，我们系的分散趋势的变化是最好的解释常染色体加性和3上位性成分。我们的结果表明，分散倾向是可遗传的，但我们的选择系的大部分分歧是由于上位性效应。这些结果与其他生活史性状一致，这些性状被预测保持比加性变异更多的上位性变异，并突出了上位性变异作为一种适应性储备的潜力，当种群被细分时，这种储备可能在选择中变得明显。
The genetic underpinnings of traits are rarely simple. Most traits of interest are instead the product of multiple genes acting in concert to determine the phenotype. This is particularly true for behavioral traits, like dispersal. Our investigation focuses on the genetic architecture of dispersal tendency in the red flour beetle, Tribolium castaneum. We used artificial selection to generate lines with either high or low dispersal tendency. Our populations responded quickly in the first generations of selection and almost all replicates had higher dispersal tendency in males than in females. These selection lines were used to create a total of 6 additional lines: F1 and reciprocal F1, as well as 4 types of backcrosses. We estimated the composite genetic effects that contribute to divergence in dispersal tendency among lines using line cross-analysis. We found variation in the dispersal tendency of our lines was best explained by autosomal additive and 3 epistatic components. Our results indicate that dispersal tendency is heritable, but much of the divergence in our selection lines was due to epistatic effects. These results are consistent with other life-history traits that are predicted to maintain more epistatic variance than additive variance and highlight the potential for epistatic variation to act as an adaptive reserve that may become visible to selection when a population is subdivided.
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影响因子：
4.5
作者：
Monnahan PJ;Kelly JK
通讯作者：
Kelly JK
影响因子：
30.8
作者：
Carlborg, Ö;Jacobsson, L;Andersson, L
通讯作者：
Andersson, L
影响因子：
3.3
作者：
GOODNIGHT, CJ
通讯作者：
GOODNIGHT, CJ
野生鸟类种群中的全基因组关联映射确定了生命历史特征中遗传和表型变异之间的联系。
DOI：
10.1098/rspb.2015.0156
发表时间：
2015-05-07
期刊：
Proceedings. Biological sciences
影响因子：
--
作者：
Husby A;Kawakami T;Rönnegård L;Smeds L;Ellegren H;Qvarnström A
通讯作者：
Qvarnström A
DOI：
10.1111/j.1439-0388.1997.tb00502.x
发表时间：
1997-06-01
期刊：
JOURNAL OF ANIMAL BREEDING AND GENETICS-ZEITSCHRIFT FUR TIERZUCHTUNG UND ZUCHTUNGSBIOLOGIE
影响因子：
--
作者：
Fuerst, C;James, JW;Essl, A
通讯作者：
Essl, A