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首页> 外文期刊>Italian journal of animal science >Phylogeny, genetic relationships and population structure of five Italian local chicken breeds
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Phylogeny, genetic relationships and population structure of five Italian local chicken breeds

机译：五种意大利当地鸡品种的系统发育，遗传关系和种群结构

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摘要

Number and population size of local chicken breeds in Italy is considered to be critical. Molecular data can be used to provide reliable insight into the diversity of chicken breeds. The first aim of this study was to investigate the maternal geneticorigin of five Italian local chicken breeds (Ancona, Livorno, Modenese, Romagnola and Valdarnese bianca) based on mitochondrial DNA (mtDNA) information. Secondly, the extent of the genetic diversity, population structure and the genetic relationships among these chicken populations, by using 27 microsatellite markers, were assessed. To achieve these targets, a 506 bp fragment of the D-loop region was sequenced in 50 chickens of the five breeds. Eighteen variable sites were observed which defined 12 haplotypes. They were assigned to three clades and two maternal lineages. Results indicated that 90% of the haplotypes are related to clade E, which has been described to originate from the Indian subcontinent. For the microsatellite analysis, 137 individualblood samples from the five Italian breeds were included. A total of 147 alleles were detected at 27 microsatellite loci. The five Italian breeds showed a slightly higher degree of inbreeding (FIS=0.08) than the commercial populations that served as reference. Structure analysis showed a separation of the Italian breeds from the reference populations. A further sub-clustering allowed discriminating among the five different Italian breeds. This research provides insight into population structure, relatedness and variability of the five studied breeds.
机译：意大利本地鸡品种的数量和人口规模被认为是至关重要的。分子数据可用于提供对鸡肉品种多样性的可靠见解。这项研究的第一个目的是基于线粒体DNA（mtDNA）信息，调查五个意大利当地鸡品种（安科纳，里窝那，摩德涅斯，罗马涅拉和瓦尔达涅斯比安卡）的母系遗传起源。其次，通过使用27个微卫星标记，评估了这些鸡种群之间的遗传多样性，种群结构和遗传关系。为了实现这些目标，在五个品种的50只鸡中对D环区域的506 bp片段进行了测序。观察到18个可变位点，其定义了12个单倍型。他们被分配到三个分支和两个母系。结果表明90％的单倍型与进化枝E有关，进化枝E被描述为起源于印度次大陆。对于微卫星分析，包括来自五个意大利品种的137个个体血液样本。在27个微卫星基因座上共检测到147个等位基因。与作为参考的商业种群相比，五个意大利品种的近交程度（FIS = 0.08）略高。结构分析表明意大利品种与参考种群分离。进一步的子集群可以区分五个不同的意大利品种。这项研究提供了五个研究品种的种群结构，相关性和变异性的见识。

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