Genetic divergence among Mexican populations of red mangrove (Rhizophora mangle): geographic and historic effects
Genetic divergence among Mexican populations of red mangrove (Rhizophora mangle): geographic and historic effects
复制标题
墨西哥红树林种群之间的遗传差异：地理和历史影响
DOI：
10.4067/s0719-81322020000300087
复制
发表时间：
2002
影响因子：
--
通讯作者：
R. Dirzo
中科院分区：
文献类型：
--
作者：
J. Núñez‐Farfán;C. Domínguez;L. Eguiarte;A. Cornejo;M. Quijano;Jesus Vargas;R. Dirzo
巴拿马地峡在大约350万年前隆起，隔离了分布在今天太平洋和大西洋海岸的植物和动物种群。红红树林，Rhizophora mangle，是基因流被这种地质现象中断的物种之一。在这里，我们测量的程度，墨西哥种群之间的遗传分化的R。mangle，包括海岸之间和海岸内部，并探索负责其遗传结构的进化过程。14个居群R.采用同工酶对10个个体进行多位点基因型筛选。结果表明，红蜘蛛群体间存在显著的遗传分化（Fst = 0.287）和高度的近交（Fis = 0.428）。轧碎。大西洋沿岸种群间的基因流（Nm = 0.738）低于太平洋种群间的基因流（Nm = 3.174）。如所示的基因流的低值（Nm = 0.433），并通过限制太平洋人群的等位基因的存在下，这两个海岸是相互隔离的。基因流动并不遵循距离隔离模型的预期，而是反映了种群间复杂的迁移模式。在太平洋沿岸最北端的人群中有一个等位基因的丢失。我们的研究结果表明，遗传漂变可能在本研究中发现的红红树林种群分化中发挥了重要作用。
The Panamanian Isthmus uplifted about 3.5 million years ago, isolating plant and animal populations distributed in what today are the Pacific and Atlantic coasts. The red mangrove, Rhizophora mangle, is one of those species in which gene flow was interrupted by this geological phenomenon. Here, we measure the extent of genetic divergence among Mexican populations of R. mangle, both between and within coasts, and explore the evolutionary processes responsible for their genetic structure. Fourteen populations of R. mangle were sampled and individuals were screened for multi-locus genotypes using isozymes. We detected a marked genetic differentiation among populations (Fst = 0.287) and high inbreeding (Fis = 0.428) in R. mangle. Inferred gene flow among populations of the Atlantic coast (Nm = 0.738) was lower than that observed among the Pacific populations (Nm = 3.174). As indicated by the low values of gene flow (Nm = 0.433), and by the presence of alleles restricted to Pacific populations, the two coasts are isolated from each other. Gene flow does not follow the expectation of the model of isolation by distance, and reflects a complex pattern of migration among populations. The loss of one allele is documented for the northernmost population on the Pacific coast. Our results suggest that genetic drift may have played a major role in the population differentiation of red mangrove found in this study.
1930年代和1940年代日本教育机构的转型重组过程(3) - 从战时到战后初期的变化 -
DOI：
--
发表时间：
2011
期刊：
教育史学会会報
影响因子：
--
作者：
Mori;S.;矢野智司;梶山雅史
通讯作者：
梶山雅史