| Sheep HapMap and Animal Resources The International Sheep Genomics Consortium has been very active in the area of SNP discovery over the last 12 months and a 60k Illumina SNP array will be ready in mid 2008. It is therefore time to collect the breed samples and associated information for the HapMap and Breed Diversity project. The opportunity to participate is still open, as delays in the SNP discovery component of the work have resulted in a delayed timeline. This means the opportunity to become a Breed Champion for your favourite sheep breed still exists. A Breed Champion is responsible for coordinating the selection and sampling of suitably unrelated sheep and for meeting the DNA submission and financial deadlines. The current list of confirmed participants and breed champions is:
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The following is a list of individuals and groups who have expressed interest in participating but who have not yet found a source of funding:
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| The list of breeds is not complete and additional breeds are being sought from Asia, Europe, the Middle East and South America. The revised key dates are given below, along with information about the process for participation. If you have an interest in joining the sheep HapMap project, the minimum number of animals for participation is 24 individuals per breed. This number of individuals will enable estimates of genetic diversity for a breed, but based on the bovine HapMap data 24 individuals will be insufficient for accurate analysis of linkage disequilibrium within populations or haplotype sharing between populations. Similarly, the ability to detect selection signatures between/within populations will also be markedly enhanced with larger numbers of animals. If investigation of these latter aspects are an important reason for the participation of your breed in the study, then we suggest that you should provide at least 50 individuals for LD analysis (note: better LD decay results will be obtained with 100 animals), or at least 100 individuals if you want to detect selection signatures. Cost The following costs are current best-guess estimates and include both array construction and custom genotyping of the 60K SNP array. There are three tiers at which participation can be arranged.
Note also that the above costs do not include the cost of shipping the DNA samples (shipping costs are the responsibility of the organisation that submits the samples), and that the costs apply to the number of individuals submitted rather than to the number that can be successfully genotyped (it is the responsibility of the submitting organisation to ensure that the DNA quality is suitable for genotyping using a 60K SNP array). Timeline There are two key dates - a financial commitment date and a DNA submission date. The financial date is Thursday 31st June 2008 and is the date by which firm commitments to support the inclusion of breed sets are required. The commitment itself will take the form of a purchase order (PO) with Illumina. Illumina has agreed to arrange a separate PO for each participant. This will be an invoice for payment to be arranged between each Institution and Illumina, and will describe the total financial commitment payable by that Institution. All of the POs will be attached to a single quote, meaning everyone benefits from cost savings associated with managing the process collectively (more details will be provided soon). After this time, participation will not be possible in the initial ISGC Sheep HapMap project and it should be noted that the price per animal in subsequent experiments is likely to be significantly higher. It is therefore essential that participants very quickly determine their level of available funding. Note: the previous financial date has been adjusted to 31st July to allow for delays in the Solexa ovine SNP discovery project. The second key date is also Thursday 31st July 2008 which is the deadline for submission of DNA samples into the ISGC DNA Repository. The updated requirements for participation are:
Please contact the secretary to register expressions of interest and for further information concerning participation. The consortium is an open forum and will consider reasonable modifications to any of the requirements listed above. |