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首页> 外文期刊>Environmental toxicology and chemistry >GENETIC STRUCTURE AND mtDNA DIVERSITY OF FUNDULUS HETEROCLITUS POPULATIONS FROM POLYCYCLIC AROMATIC HYDROCARBON-CONTAMINATED SITES
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GENETIC STRUCTURE AND mtDNA DIVERSITY OF FUNDULUS HETEROCLITUS POPULATIONS FROM POLYCYCLIC AROMATIC HYDROCARBON-CONTAMINATED SITES

机译：多环芳烃被污染的异地真菌的遗传结构和线粒体DNA多样性

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摘要

Genetic structure and diversity of mummichog (Fundulus heteroclitus) populations were investigated using mitochondrial DNA (mtDNA) sequences. Forty-six haplotypes were identified among 208 mummichog from the Elizabeth and York Rivers in Virginia, USA. No evidence of decreased gene or nucleotide diversity for mummichog from polycyclic aromatic hydrocarbon (PAH)―contaminated sites was observed. However, based on mtDNA data from 17 sites, a significant correlation (Mantel analysis, p = 0.035) was noted between genetic distance (F_(ST)) and PAH concentration but not between genetic distance and geographic distance. Mummichog from the most heavily PAH-contaminated site, Atlantic Wood (AW), were genetically distinct from those of other Elizabeth River sites. At AW, high frequencies of several divergent haplotypes were observed that were more closely allied to the northern mummichog than to the more abundant southern form in the Chesapeake Bay. These data suggested that a locally stable population existed at the AW site. This conclusion is consistent with the observation that mummichog from the AW site display enhanced tolerance to PAH contamination relative to mummichog from noncontaminated sites. Conclusions about gene diversity and the correlation between genetic distance with site differences in PAH concentrations were also consistent with those from tandem genetic analyses based on allozymes.
机译：使用线粒体DNA（mtDNA）序列研究了木乃伊（Fundulus heteroclitus）种群的遗传结构和多样性。在美国弗吉尼亚州伊丽莎白河和约克河的208个mummichog中鉴定出46种单倍型。没有证据表明来自多环芳烃（PAH）污染位点的木乃伊的基因或核苷酸多样性降低。但是，根据来自17个站点的mtDNA数据，注意到遗传距离（F_（ST））和PAH浓度之间存在显着相关性（Mantel分析，p = 0.035），而遗传距离和地理距离之间没有显着相关性。来自受PAH污染最严重的地区Mummichog（大西洋木材（AW））在基因上与其他伊丽莎白河地区不同。在AW，观察到几种不同单倍型的高频率，与切萨皮克湾北部的木乃伊格邦更紧密地联系在一起，而不是与更丰富的南部形式有关。这些数据表明在AW现场存在本地稳定的种群。该结论与以下观察结果相符：相对于来自未污染场所的灭蚊剂，来自AW场所的灭蚊剂对PAH污染的耐受性增强。有关基因多样性以及遗传距离与PAH浓度位点差异之间的相关性的结论也与基于同工酶的串联遗传分析的结论一致。

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