Table_1_Genetic Connectedness Between Norwegian White Sheep and New Zealand Composite Sheep Populations With Similar Development History.docx

The Norwegian White sheep (NWS) and New Zealand Terminal Sire Composite (NZC) sheep breeds have been developed based on crossing of multiple breeds, mainly of Northern European origin. A close genetic relationship between these populations could enable across-country genomic evaluations. The main objectives of this study were to assess the genetic connectedness between Norwegian and New Zealand sheep populations and estimate numerous genetic diversity metrics for these two populations. A total of 792 NWS and 16,912 NZC animals were genotyped using a high-density Illumina SNP chip panel (∼606K SNPs). The NZC animals were grouped based on their breed composition as: Finn, Lamb Supreme, Primera, Texel, “Other Dual Purpose”, and “Other Terminal Sire”. The average level of linkage disequilibrium ranged from 0.156 (for Primera) to 0.231 (for Finn). The lowest consistency of gametic phase was estimated between NWS and Finn (0.397), and between NWS and Texel (0.443), respectively. Similar consistency of gametic phase was estimated between NWS and the other NZC populations (∼ 0.52). For all composite sheep populations analyzed in this study, the majority of runs of homozygosity (ROH) segments identified had short length (

挪威白羊（NWS）及新西兰终端公羊复合品种（NZC）的羊种，系基于多品种杂交培育而成，主要源自北欧。这些种群之间紧密的遗传关系可能有助于实现跨国基因组评估。本研究的核心目标在于评估挪威与新西兰羊群之间的遗传关联，并估算这两个种群的大量遗传多样性指标。共计792头NWS和16912头NZC羊只通过高密度Illumina SNP芯片组（约606K个SNPs）进行了基因分型。NZC羊只根据其品种组成分为：芬兰品种、羊最高品质品种、Primera品种、特克斯尔品种、“其他双用途品种”以及“其他终端公羊品种”。连锁不平衡的平均水平介于0.156（Primera品种）至0.231（芬兰品种）之间。NWS与芬兰品种之间、NWS与特克斯尔品种之间，分别估计出的配子相一致性最低，分别为0.397和0.443。NWS与其他NZC种群之间的配子相一致性相似，约为0.52。在本研究中分析的复合羊种群中，大多数同源染色体连续段（ROH）长度较短（