Structure bar plot with each bar representing the proportion of ancestry of each sampled individual of feral pigs, North Queensland, to the three inferred groups (beige, grey and black)

Feral pigs occur throughout tropical far north Queensland, Australia and are a significant threat to biodiversity and World Heritage values, agriculture and are a vector of infectious diseases. One of the constraints on long-lasting, local eradication of feral pigs is the process of reinvasion into recently controlled areas. This study examined the population genetic structure of feral pigs in far north Queensland to identify the extent of movement and the scale at which demographically independent management units exist. Genetic analysis of 328 feral pigs from the Innisfail to Tully region of tropical Queensland was undertaken. Seven microsatellite loci were screened and Bayesian clustering methods used to infer population clusters. Sequence variation at the mitochondrial DNA control region was examined to identify pig breed.  The figure shows a structure bar plot representing the proportion of ancestry of each sampled individual of feral pig to the three inferred groups (beige, grey and black) with the values on the x-axis referring to sample sites.

澳大利亚昆士兰州远北部热带区域遍布野化猪（feral pig），它们对生物多样性、世界遗产价值与农业生产构成严重威胁，同时还可作为传染病的传播媒介。野化猪的长效本地根除工作面临的一大限制因素，便是野化猪重新入侵近期已完成管控区域的过程。本研究针对昆士兰州远北部区域的野化猪开展种群遗传结构分析，以明确其扩散范围，以及种群动态独立的管理单元的划分尺度。本研究对采集自昆士兰州热带区域因尼斯费尔（Innisfail）至塔利（Tully）地区的328头野化猪进行了遗传分析：筛选了7个微卫星位点（microsatellite loci），并采用贝叶斯聚类方法（Bayesian clustering methods）推断种群聚类群；同时对线粒体DNA控制区（mitochondrial DNA control region）的序列变异进行检测，以鉴定猪的品种来源。本研究附图展示了一幅群体结构柱状图（structure bar plot），用于呈现每一头采样野化猪个体在3个推断聚类群（米色、灰色与黑色）中的祖先组分占比，图中横轴对应的为采样位点。