当前位置: X-MOL 学术Int. J. Parasitol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Trypanosoma vivax displays a clonal population structure.
International Journal for Parasitology ( IF 3.7 ) Pub Date : 2009-06-13 , DOI: 10.1016/j.ijpara.2009.05.012
Craig W Duffy 1 , Liam J Morrison , Alana Black , Gina L Pinchbeck , Robert M Christley , Andreas Schoenefeld , Andy Tait , C Michael R Turner , Annette MacLeod
Affiliation  

African animal trypanosomiasis, or Nagana, is a debilitating and economically costly disease with a major impact on animal health in sub-Saharan Africa. Trypanosoma vivax, one of the principal trypanosome species responsible for the disease, infects a wide host range including cattle, goats, horses and donkeys and is transmitted both cyclically by tsetse flies and mechanically by other biting flies, resulting in a distribution covering large swathes of South America and much of sub-Saharan Africa. While there is evidence for mating in some of the related trypanosome species, Trypanosoma brucei, Trypanosoma congolense and Trypanosoma cruzi, very little work has been carried out to examine this question in T. vivax. Understanding whether mating occurs in T. vivax will provide insight into the dynamics of trait inheritance, for example the spread of drug resistance, as well as examining the origins of meiosis in the order Kinetoplastida. With this in mind we have identified orthologues of eight core meiotic genes within the genome, the presence of which imply that the potential for mating exists in this species. In order to address whether mating occurs, we have investigated a sympatric field population of T. vivax collected from livestock in The Gambia, using microsatellite markers developed for this species. Our analysis has identified a clonal population structure showing significant linkage disequilibrium, homozygote deficits and disagreement with Hardy-Weinberg predictions at six microsatellite loci, indicative of a lack of mating in this population of T. vivax.

中文翻译:

间日锥虫显示克隆种群结构。

非洲动物锥虫病或 Nagana 是一种使人衰弱且经济代价高昂的疾病,对撒哈拉以南非洲的动物健康产生重大影响。间日锥虫是导致该病的主要锥虫物种之一,可感染包括牛、山羊、马和驴在内的广泛宿主,并由采采蝇循环传播,并由其他叮咬蝇机械传播,导致分布覆盖大片南美洲和撒哈拉以南非洲的大部分地区。虽然有证据表明在一些相关的锥虫物种(布氏锥虫、刚果锥虫和克氏锥虫)中存在交配,但在 T. vivax 中研究这个问题的工作很少。了解是否在 T. vivax 中发生交配将有助于深入了解性状遗传的动态,例如耐药性的传播,以及检查动质体目减数分裂的起源。考虑到这一点,我们已经确定了基因组中八个核心减数分裂基因的直向同源物,它们的存在意味着该物种存在交配的潜力。为了确定是否发生交配,我们使用为该物种开发的微卫星标记调查了从冈比亚家畜中收集的间日疟原虫同域野外种群。我们的分析确定了一个克隆种群结构,显示出显着的连锁不平衡、纯合子缺陷以及与 Hardy-Weinberg 在六个微卫星位点的预测不一致,这表明该间日疟原虫种群缺乏交配。考虑到这一点,我们已经确定了基因组中八个核心减数分裂基因的直向同源物,它们的存在意味着该物种存在交配的潜力。为了确定是否发生交配,我们使用为该物种开发的微卫星标记调查了从冈比亚家畜中收集的间日疟原虫同域野外种群。我们的分析确定了一个克隆种群结构,显示出显着的连锁不平衡、纯合子缺陷以及与 Hardy-Weinberg 在六个微卫星位点的预测不一致,表明该间日疟原虫种群缺乏交配。考虑到这一点,我们已经确定了基因组中八个核心减数分裂基因的直向同源物,它们的存在意味着该物种存在交配的潜力。为了确定是否发生交配,我们使用为该物种开发的微卫星标记调查了从冈比亚家畜中收集的间日疟原虫同域野外种群。我们的分析确定了一个克隆种群结构,显示出显着的连锁不平衡、纯合子缺陷以及与 Hardy-Weinberg 在六个微卫星位点的预测不一致,表明该间日疟原虫种群缺乏交配。我们使用为该物种开发的微卫星标记调查了从冈比亚的牲畜中收集的间日疟原虫同域野外种群。我们的分析确定了一个克隆种群结构,显示出显着的连锁不平衡、纯合子缺陷以及与 Hardy-Weinberg 在六个微卫星位点的预测不一致,表明该间日疟原虫种群缺乏交配。我们使用为该物种开发的微卫星标记调查了从冈比亚的牲畜中收集的间日疟原虫同域野外种群。我们的分析确定了一个克隆种群结构,显示出显着的连锁不平衡、纯合子缺陷以及与 Hardy-Weinberg 在六个微卫星位点的预测不一致,表明该间日疟原虫种群缺乏交配。
更新日期:2009-06-08
down
wechat
bug