{"title":"一对瓢虫种的种间和种内遗传和形态变异。","authors":"Hilde Dhuyvetter, Jean-Pierre Maelfait, Konjev Desender","doi":"10.1186/1746-1448-3-4","DOIUrl":null,"url":null,"abstract":"<p><strong>Background: </strong>Pogonus littoralis and Pogonus chalceus are very close related species with quite different ecological preferences within salt marshes. We study the evolutionary processes in and between these presumably young species. Therefore, we compare the variation in ecologically relevant characters and the genetic variation within one of the species (intraspecific differentiation) with the variation of the two types of characters between the two species (interspecific variation). Data are compared between two independent sets of populations, one set at a small geographical scale (the ecologically diverse Guérande area in France) and the other set at a Atlantic-Mediterranean scale.</p><p><strong>Results: </strong>Body and relative wing size and IDH1 allozyme data show that the intraspecific variation in P. chalceus is high and in the same range as the interspecific variation (P. chalceus versus P. littoralis). Based on neutral markers (other allozymes and mitochondrial DNA) on the other hand, the intraspecific variation in P. chalceus is much lower in comparison to the interspecific variation.</p><p><strong>Conclusion: </strong>The different ecotypes in the highly polytypic species P. chalceus are as highly differentiated in ecological characters as true species, but are not recognised as such by screening neutral DNA polymorphisms. This can be interpreted as a case of ongoing speciation driven by natural selection adapting each ecotype to its respective ecological niche. The same ecological process can be recognised in the differentiation between the two sister species, where en plus reproductive isolation between the two gene pools occurred, allowing independent drift and mutation accumulation in neutral genetic characters.</p>","PeriodicalId":87359,"journal":{"name":"Saline systems","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2007-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/1746-1448-3-4","citationCount":"9","resultStr":"{\"title\":\"Inter- and intraspecific genetic and morphological variation in a sibling pair of carabid species.\",\"authors\":\"Hilde Dhuyvetter, Jean-Pierre Maelfait, Konjev Desender\",\"doi\":\"10.1186/1746-1448-3-4\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Background: </strong>Pogonus littoralis and Pogonus chalceus are very close related species with quite different ecological preferences within salt marshes. We study the evolutionary processes in and between these presumably young species. Therefore, we compare the variation in ecologically relevant characters and the genetic variation within one of the species (intraspecific differentiation) with the variation of the two types of characters between the two species (interspecific variation). Data are compared between two independent sets of populations, one set at a small geographical scale (the ecologically diverse Guérande area in France) and the other set at a Atlantic-Mediterranean scale.</p><p><strong>Results: </strong>Body and relative wing size and IDH1 allozyme data show that the intraspecific variation in P. chalceus is high and in the same range as the interspecific variation (P. chalceus versus P. littoralis). Based on neutral markers (other allozymes and mitochondrial DNA) on the other hand, the intraspecific variation in P. chalceus is much lower in comparison to the interspecific variation.</p><p><strong>Conclusion: </strong>The different ecotypes in the highly polytypic species P. chalceus are as highly differentiated in ecological characters as true species, but are not recognised as such by screening neutral DNA polymorphisms. This can be interpreted as a case of ongoing speciation driven by natural selection adapting each ecotype to its respective ecological niche. The same ecological process can be recognised in the differentiation between the two sister species, where en plus reproductive isolation between the two gene pools occurred, allowing independent drift and mutation accumulation in neutral genetic characters.</p>\",\"PeriodicalId\":87359,\"journal\":{\"name\":\"Saline systems\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2007-04-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1186/1746-1448-3-4\",\"citationCount\":\"9\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Saline systems\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1186/1746-1448-3-4\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Saline systems","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1186/1746-1448-3-4","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 9
摘要
背景:盐沼里的滨竹和沙竹是亲缘关系非常近的物种,但生态偏好却截然不同。我们研究这些可能是年轻物种内部和之间的进化过程。因此,我们将生态相关性状的变异和同一种内的遗传变异(种内分化)与两种性状的变异(种间变异)进行比较。数据在两组独立的人口之间进行比较,一组在较小的地理范围内(法国生态多样化的gusamande地区),另一组在大西洋-地中海范围内。结果:chalceus的体、相对翅大小和IDH1同工酶数据表明,chalceus的种内变异与种间变异(chalceus vs . littoralis)在相同的范围内。另一方面,基于中性标记(其他同工酶和线粒体DNA),与种间变异相比,鹅尾松的种内变异要低得多。结论:高多型种棘球藻的不同生态型在生态性状上与真种具有高度分化,但通过中性DNA多态性的筛选无法识别。这可以解释为一种由自然选择驱动的持续物种形成的情况,使每种生态类型适应其各自的生态位。同样的生态过程可以在两个姊妹物种之间的分化中被认识到,其中两个基因库之间发生了en +生殖隔离,允许中性遗传性状的独立漂移和突变积累。
Inter- and intraspecific genetic and morphological variation in a sibling pair of carabid species.
Background: Pogonus littoralis and Pogonus chalceus are very close related species with quite different ecological preferences within salt marshes. We study the evolutionary processes in and between these presumably young species. Therefore, we compare the variation in ecologically relevant characters and the genetic variation within one of the species (intraspecific differentiation) with the variation of the two types of characters between the two species (interspecific variation). Data are compared between two independent sets of populations, one set at a small geographical scale (the ecologically diverse Guérande area in France) and the other set at a Atlantic-Mediterranean scale.
Results: Body and relative wing size and IDH1 allozyme data show that the intraspecific variation in P. chalceus is high and in the same range as the interspecific variation (P. chalceus versus P. littoralis). Based on neutral markers (other allozymes and mitochondrial DNA) on the other hand, the intraspecific variation in P. chalceus is much lower in comparison to the interspecific variation.
Conclusion: The different ecotypes in the highly polytypic species P. chalceus are as highly differentiated in ecological characters as true species, but are not recognised as such by screening neutral DNA polymorphisms. This can be interpreted as a case of ongoing speciation driven by natural selection adapting each ecotype to its respective ecological niche. The same ecological process can be recognised in the differentiation between the two sister species, where en plus reproductive isolation between the two gene pools occurred, allowing independent drift and mutation accumulation in neutral genetic characters.