SEXUAL ISOLATION EVOLVES FASTER THAN HYBRID INVIABILITY IN A DIVERSE AND SEXUALLY DIMORPHIC GENUS OF FISH (PERCIDAE: ETHEOSTOMA)
SEXUAL ISOLATION EVOLVES FASTER THAN HYBRID INVIABILITY IN A DIVERSE AND SEXUALLY DIMORPHIC GENUS OF FISH (PERCIDAE: ETHEOSTOMA)
复制标题
在多样化和性别二态性的鱼类（鲈科：ETHEOSOMA）中，性隔离的进化速度比杂交不存活的速度更快
DOI：
--
复制
发表时间：
2003
期刊：
影响因子：
--
通讯作者：
T. Mendelson
中科院分区：
文献类型：
--
作者：
T. Mendelson
抽象理论预测，性（或行为）隔离将是以性选择为特征的谱系中进化的第一种生殖隔离形式。在这里，我直接比较的进化速度的性隔离与杂交不活泼的多样性和性二态属的淡水鱼。性隔离和混合活力的大小进行了量化的多对异域物种。通过比较这些物种对的遗传距离与每种形式的生殖隔离的大小来推断进化速率：遗传距离对生殖隔离大小的回归斜率代表进化速率。在这两种隔离形式中，性隔离的程度表现出更陡峭的回归斜率，表明性隔离将倾向于比杂交不活力更早地进化到完成，严格地说，这是地理隔离种群进化的副产品。来自文献的其他证据被用来定性地比较性隔离与其他形式的生殖隔离的进化速率。初步比较支持性隔离将比其他形式更快地进化的预测。由于镖鲈的特点是惊人的性二型性，这些结果是一致的假设，即性选择夸大的配偶识别字符的原因相对较快的进化性隔离。
Abstract Theory predicts that sexual (or behavioral) isolation will be the first form of reproductive isolation to evolve in lineages characterized by sexual selection. Here I directly compare the rate of evolution of sexual isolation with that of hybrid inviability in a diverse and sexually dimorphic genus of freshwater fish. The magnitude of both sexual isolation and hybrid inviability were quantified for multiple pairs of allopatric species. Rates of evolution were inferred by comparing genetic distances of these species pairs with the magnitude of each form of reproductive isolation: the slope of the regression of genetic distance on the magnitude of reproductive isolation represents the rate of evolution. Of the two forms of isolation, the magnitude of sexual isolation exhibited the steeper slope of regression, indicating that sexual isolation will tend to evolve to completion earlier than hybrid inviability, strictly as a by-product of evolution in geographically isolated populations. Additional evidence from the literature is used to qualitatively compare rates of evolution of sexual isolation with that of other forms of reproductive isolation. Preliminary comparisons support the prediction that sexual isolation will evolve more rapidly than other forms. Because Etheostoma is characterized by striking sexual dimorphism, these results are consistent with the hypothesis that sexual selection for exaggerated mate-recognition characters causes the relatively rapid evolution of sexual isolation.
DOI：
--
发表时间：
2004
期刊：
--
影响因子：
--
作者：
J. Werren
通讯作者：
J. Werren