Spatially varying selection shapes life history clines among populations of Drosophila melanogaster from sub-Saharan Africa.
Spatially varying selection shapes life history clines among populations of Drosophila melanogaster from sub-Saharan Africa.
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DOI：
10.1111/jeb.12607
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发表时间：
2015-04
影响因子：
2.1
通讯作者：
Flatt T
中科院分区：
文献类型：
--
作者：
Fabian DK;Lack JB;Mathur V;Schlötterer C;Schmidt PS;Pool JE;Flatt T
生活史性状的倾向，大概是由空间变化的选择，是普遍存在的。例如，在黑腹果蝇（Drosophila melanogaster）中观察到了主要的纬度倾斜，黑腹果蝇是一种来自非洲的祖先热带昆虫，在多个大陆的温带栖息地定居。然而，除了纬度以外的地理因素，如海拔或经度，如何影响这个物种的生活史仍然知之甚少。此外，大多数以前的工作已经进行了派生的欧洲，美洲和澳大利亚的人口，但是否生活史也有不同的地理在祖先的非洲热带地区尚未进行系统的调查。在这里，我们研究了生活史的变化之间的人口D。产于撒哈拉以南非洲的黑腹果蝇。生活力和生殖滞育不随地理而变化，但身体大小随海拔，纬度和经度而增加。早期繁殖力与海拔和纬度呈正相关，而寿命则呈相反的趋势。遗传方差-协方差矩阵的检查显示，地理分化也在权衡结构，和QST-FST分析表明，种群之间的生活史分化可能是由选择塑造。总之，我们的研究结果表明，地理和/或气候因素驱动非洲祖先群体之间的适应性表型分化，并确认了广泛持有的观点，即纬度和海拔代表平行梯度。
Clines in life history traits, presumably driven by spatially varying selection, are widespread. Major latitudinal clines have been observed, for example, in Drosophila melanogaster, an ancestrally tropical insect from Africa that has colonized temperate habitats on multiple continents. Yet, how geographic factors other than latitude, such as altitude or longitude, affect life history in this species remains poorly understood. Moreover, most previous work has been performed on derived European, American and Australian populations, but whether life history also varies predictably with geography in the ancestral Afro-tropical range has not been investigated systematically. Here, we have examined life history variation among populations of D. melanogaster from sub-Saharan Africa. Viability and reproductive diapause did not vary with geography, but body size increased with altitude, latitude and longitude. Early fecundity covaried positively with altitude and latitude, whereas lifespan showed the opposite trend. Examination of genetic variance-covariance matrices revealed geographic differentiation also in trade-off structure, and QST-FST analysis showed that life history differentiation among populations is likely shaped by selection. Together, our results suggest that geographic and/or climatic factors drive adaptive phenotypic differentiation among ancestral African populations and confirm the widely held notion that latitude and altitude represent parallel gradients.
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影响因子：
4.9
作者：
Fabian DK;Kapun M;Nolte V;Kofler R;Schmidt PS;Schlötterer C;Flatt T
通讯作者：
Flatt T
影响因子：
2.7
作者：
Blanckenhorn, WU
通讯作者：
Blanckenhorn, WU
影响因子：
3.3
作者：
Azevedo, RBR;French, V;Partridge, L
通讯作者：
Partridge, L
DOI：
10.1007/bf01990682
发表时间：
1975-01-01
期刊：
EXPERIENTIA
影响因子：
--
作者：
DAVID, JR;BOCQUET, C
通讯作者：
BOCQUET, C
影响因子：
3.3
作者：
GEBER, MA
通讯作者：
GEBER, MA