Data from: Lack of genetic introgression between wild and selectively bred Sydney rock oysters Saccostrea glomerata

Sydney rock oysters Saccostrea glomerata are among the most important estuarine species on the eastern coast of Australia and also the basis of a major aquaculture industry. The industry now largely relies on Sydney rock oysters that have been selectively bred for fast growth and disease resistance. Selectively bred S. glomerata are currently farmed in estuaries that also sustain wild populations of Sydney rock oysters, providing the opportunity for interbreeding. This has led to concern that gene flow from farmed, selectively bred oysters could alter the genetic variability of wild oyster populations. Here, we use next-generation genotype-by-sequencing to test for genetic introgression between wild and farmed, selectively bred (B2 line) Sydney rock oysters from 2 sites in the Georges River, NSW. Strong genetic partitioning was identified between the wild and selectively bred populations. There was no evidence of gene flow in the form of introgression, even though selectively bred B2 oysters have been farmed in the Georges River since the early 1990s. Contrary to our expectations, we also found significantly higher levels of genetic diversity and heterozygosity in the selectively bred population relative to the wild population. The relatively low level of genetic diversity that we detected in wild oysters may be particularly relevant to the adaptive capacity of this species in the wild.

Usage Notes
Final filtered SNP data for Saccostrea glomerataSNP data for 90 oysters at 1200 loci, provided in GenAlEx format (0=Missing data, 1=Reference allele, 2=SNP allele) in an Excel file. Population codes match those used in the text of the corresponding published manuscript.SNP_data_M12109.xlsx

悉尼岩蚝（Saccostrea glomerata）作为澳大利亚东部海岸最重要的河口物种之一，同时也是一项重要水产养殖产业的基石。当前，该产业主要依赖经过选择性育种以实现快速生长和抗病性增强的悉尼岩蚝。目前，选择性育种的S. glomerata在同样维持着野生悉尼岩蚝种群的河口进行养殖，这为杂交提供了可能。然而，这引发了担忧，即来自养殖、选择性育种的蚝的基因流可能改变野生蚝种群的遗传多样性。在本研究中，我们运用下一代基因分型测序技术，对来自新南威尔士州乔治河两个地点的野生和养殖、选择性育种（B2系）悉尼岩蚝进行遗传渗入检测。在野生和选择性育种群体之间发现了显著的遗传分异。尽管自20世纪90年代初以来，选择性育种的B2蚝已在乔治河养殖，但并未发现基因渗入的基因流证据。与预期相反，我们还发现，与野生群体相比，选择性育种群体中的遗传多样性和杂合度显著更高。在野生蚝中检测到的相对较低的遗传多样性可能对该物种在野外的适应性具有重要意义。

使用说明

Saccostrea glomerata的最终过滤SNP数据，包括90个蚝在1200个位点上的SNP数据，以GenAlEx格式（0=缺失数据，1=参考等位基因，2=SNP等位基因）提供于Excel文件中。种群代码与相应已发表手稿中的文本中使用的代码相匹配。
SNP_data_M12109.xlsx