Parallel changes in mate-attracting calls and female preferences in autotriploid tree frogs.
Parallel changes in mate-attracting calls and female preferences in autotriploid tree frogs.
复制标题
同源三倍体树蛙的求偶叫声和雌性偏好的平行变化。
DOI：
10.1098/rspb.2011.1968
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Gerhardt,HC
中科院分区：
文献类型：
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作者：
Tucker,MitchA;Gerhardt,HC
为了使多倍体物种持续存在，它们必须在繁殖上与它们的二倍体亲本物种隔离，至少在最初的时候，它们在同一时间和地点共存。在一个复合体的双亲繁殖四倍体和二倍体树蛙在北美，选择性phonotaxis-mediated的脉冲重复（脉冲率）的差异，他们的配偶吸引发声-确保不情愿的交配。我们发现，人工产生的autotriploid女性的二倍体物种（雨蛙chrysoscelis）的脉冲率偏好的方向上产生的四倍体物种（雨蛙versicolor）的男性的脉冲率的转变。估计的偏好函数集中在人工产生的雄性同源三倍体的平均脉冲率附近。这种平行的转变，这是由多倍体引起的seand其幅度预计将在同源四倍体更大，可能促进同域物种形成，促进生殖隔离的最初形成的多倍体从他们的二倍体亲本形式。这一过程也有助于解释为什么不同起源的四倍体谱系具有相似的广告呼叫和自由杂交。
For polyploid species to persist, they must be reproductively isolated from their diploid parental species, which coexist at the same time and place at least initially. In a complex of biparentally reproducing tetraploid and diploid tree frogs in North America, selective phonotaxis—mediated by differences in the pulse-repetition (pulse rate) of their mate-attracting vocalizations—ensures assortative mating. We show that artificially produced autotriploid females of the diploid species (Hyla chrysoscelis) show a shift in pulse-rate preference in the direction of the pulse rate produced by males of the tetraploid species (Hyla versicolor). The estimated preference function is centred near the mean pulse rate of the calls of artificially produced male autotriploids. Such a parallel shift, which is caused by polyploidyper seand whose magnitude is expected to be greater in autotetraploids, may have facilitated sympatric speciation by promoting reproductive isolation of the initially formed polyploids from their diploid parental forms. This process also helps to explain why tetraploid lineages with different origins have similar advertisement calls and freely interbreed.