Showing papers by "Tad S. Sonstegard published in 2003"
TL;DR: The NBFGC microarray represents the largest cDNA microarray for a livestock species prepared to date and should prove to be a valuable tool in studying genome-wide gene expression in cattle.
Abstract: A cDNA microarray resource has been developed with the goal of providing integrated functional genomics resources for cattle. The National Bovine Functional Genomics Consortium’s (NBFGC) expressed ...
70 citations
TL;DR: To map QTL associated with disease resistance to avian coccidiosis and growth, two commercial broiler lines with different degrees of resistance to the disease were crossed to generate an F1 generation that was intercrossed to produce 314 F2 generation offspring.
68 citations
TL;DR: Serial analysis of gene expression (SAGE) is employed to compare gene expression patterns in turkey SST recovered from hens after artificial insemination with extended semen (sperm AI) or extender alone (control AI).
Abstract: Turkey sperm lose viability within 8‐18 h when stored as liquid semen using current methods and extenders. In contrast, turkey hens maintain viable, fertile sperm in their sperm storage tubules (SST) for 45 or more days following a single insemination. Our long-term objectives are to identify and characterize differentially expressed genes that may underlie this prolonged sperm storage and then use this information to develop improved methods for storing liquid turkey semen. We employed serial analysis of gene expression (SAGE) to compare gene expression patterns in turkey SST recovered from hens after artificial insemination (AI) with extended semen (sperm AI) or extender alone (control AI). We constructed two separate SAGE libraries with SST RNA obtained from sperm and control AI hens. We used these libraries to generate 95 325 ten-base pair SAGE tags. These 95 325 tags represented 27 430 unique genes. The sperm and control AI libraries contained 47 663 and 47 662 tags representing 18 030 and 19 101 putative unique transcripts, respectively. Approximately 1% of these putative unique genes were differentially expressed (P , 0.05) between treatments. Tentative annotations were ascribed to the SAGE tag nucleotide sequences by comparing them against publicly available SAGE tag and cDNA sequence databases. Based on its SAGE tag nucleotide sequence, we cloned a partial turkey avidin cDNA and confirmed its up-regulation in the sperm AI SST. The bioinformatics and experimental procedures employed to clone turkey avidin and confirm its differential expression represent a useful paradigm for analyzing SAGE tag data from relatively uncharacterized model systems.
45 citations
4 citations