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BOR - Papers in Press, published online ahead of print October 20, 2004.
Biol Reprod 2004, 10.1095/biolreprod.104.034967
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Submitted August 3, 2004
Returned for revision September 15, 2004
Accepted September 29, 2004

Ovary


A Comprehensive Survey of the Genes Involved in Maturation and Development of the Rainbow Trout Ovary

Kristian R. von Schalburg , Matthew L. Rise , Gordon D. Brown , William S. Davidson , and Ben F Koop *

* To whom correspondence should be addressed. E-mail: bkoop{at}uvic.ca.

Abstract
The development and maturation of the ovary requires precisely coordinated expression of specific gene-classes to produce viable oocytes. We undertook identification of some of the genes involved in these processes by creating ovary-specific cDNA libraries by suppression subtractive hybridization and by microarray-based analyses. We present 5778 tissue- and sex-specific genes from subtracted ovary and testis libraries, many of which remain unidentified. A microarray containing 3557 salmonid cDNAs was used to compare the transcriptomes of precocious ovary at three different stages during second year with a reference (normal ovary) transcriptome. On average, about 240 genes were developmentally regulated during the study period from June to October. Classes of genes maintaining relatively steady-state levels of expression, such as those controlling tissue remodeling, immunoregulation, cell-cycle progression, apoptosis and growth were also identified. Concurrent expression of various cell division and ubiquitin-mediated proteolysis regulators revealed the utility of microarray analysis to monitor important maturation events. We also report unequivocal evidence for expression of the transcripts that encode the common glycoprotein-{alpha} (Cg{alpha}), LH{beta}, FSH{beta} and TSH{beta} subunits, and retinol-binding protein in both the ovary and testis of trout.

Key words: Ovary • Testis


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