GENOTYPE‐ENVIRONMENT INTERACTION FOR CLIMATE AND COMPETITION IN A NATURAL POPULATION OF FLOUR BEETLES, TRIBOLIUM CASTANEUM
GENOTYPE‐ENVIRONMENT INTERACTION FOR CLIMATE AND COMPETITION IN A NATURAL POPULATION OF FLOUR BEETLES, TRIBOLIUM CASTANEUM
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谷盗自然种群中气候和竞争的基因型-环境相互作用
DOI：
10.1111/j.1558-5646.1990.tb04306.x
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发表时间：
1990
期刊：
影响因子：
3.3
通讯作者：
M. Wade
中科院分区：
文献类型：
--
作者：
M. Wade
反应规范，即基因型在不同环境中产生的平均表型集合，在自然选择中会受到空间变异的影响，特别是当存在基因型-环境相互作用时。在细分的种群中，基因型-环境相互作用差异越大，迁移率越低，本地适应的可能进化轨迹就越独立。在一系列重要的生态环境中，研究了随机衍生自一个美洲三角栗野生种群的世系的基因型-环境相互作用对种群增长率的影响。这些世系是通过14代随机遗传漂变从一个近交野生捕获的种群中获得的，在此期间，每个世系的有效大小约为22个繁殖成虫。研究的环境是Park（1954）的典型温带-潮湿和寒冷-干燥气候，与同源竞争对手T. confusum的两个遗传菌株进行因子组合。在这些具有重要生态意义的气候和竞争环境中，种群增长率的遗传变异在谱系间都存在很大差异。基因型-环境相互作用占种群增长率总谱系差异的40.5%，这表明一个谱系在一种环境中的表现不一定能很好地预测其在另一种环境中的表现。改变竞争对手的遗传特性对某些世系的增长率的影响与改变温度和湿度的气候条件一样大，甚至更多。这是第一个描述基因型-环境相互作用差异与竞争性同源物种遗传变异相关的实证研究。这种竞争能力的竞争对手特异性遗传变异可能在细分群体的共同进化中发挥重要作用。
The norm of reaction, the set of average phenotypes produced by a genotype in different environments, can be affected by spatial variation in natural selection especially when there exists genotype‐environment interaction. In subdivided populations, the greater the genotype‐environment interaction variance and the lower the migration rate, the more independent are the possible evolutionary trajectories for local adaptation. I examined genotype‐environment interaction in the rate of population increase for lineages randomly derived from a wild population of Tribolium castaneum across a series of ecologically important environments. The lineages were derived from an outbred, wild‐caught population by 14 generations of random genetic drift, during which the effective size of each lineage was approximately 22 breeding adults. The environments studied were the classic temperate‐wet and cold‐dry climates of Park (1954) in factorial combination with two genetic strains of a congeneric competitor, T. confusum. Much among‐lineage genetic variation for rate of population increase was found for each of these ecologically important environments of climate and competition. Genotype‐environment interaction accounted for 40.5% of the total among‐lineage variance in rate of population increase signifying that the performance of a lineage in one environment is not necessarily a good predictor of its performance in another. Changing the genetic identity of the competitor changed the rate of increase of some lineages as much or more than changing the climatic conditions of temperature and humidity. This is the first empirical study to characterize the genotype‐environment interaction variance associated with genetic variation in a competing congeneric species. This competitor‐specific genetic variation in competitive ability may play an important role in coevolution in subdivided populations.
方差有效种群数量：性别比和密度对赤拟谷盗后代数量均值和方差的影响。
DOI：
10.1017/s0016672300026045
发表时间：
1984
期刊：
Genetical research
影响因子：
--
作者：
Wade,MJ
通讯作者：
Wade,MJ