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Autosomal Sex Reversal of Rainbow Trout

Award Information

Department of Agriculture
Award ID:
Program Year/Program:
2007 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Troutlodge, Inc.
12000 MCCUTCHEON RD Bonney Lake, WA 98391-8114
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 2007
Title: Autosomal Sex Reversal of Rainbow Trout
Agency: USDA
Contract: 2007-33610-17936
Award Amount: $76,300.00


The proposed SBIR project seeks to develop an alternative approach to the use of hormone treatment (17 -methyltestosterone) of broodstock for the production of all-female rainbow trout. In the course of normal spawning of large numbers of rainbow trout, Troutlodge personnel have identified rare occurrences of males in populations of XX female stocks. Previous studies using common carp in the Netherlands and rainbow trout in France have identified similar rare male individuals and determined that they are the result of homozygosity for a recessive autosomal sex-determining allele that overrides the normal XX-XY sex determination mechanism. This project will test for a similar phenomenon in Troutlodge stocks of rainbow trout, and utilize these alleles to establish male lines of XX individuals without the use of testosterone analogs. Rare males will be tested for (1) their ability to produce all female progeny in crosses with normal females, and (2) their ability to produce significant numbers of male progeny when their sperm is used for androgenesis (all-paternal inheritance). If both objectives are successful, it will indicate that autosomal sex reversal is likely and lead directly to Phase II research.

Principal Investigator:

James Parsons

Business Contact:

Jim Barfoot
Small Business Information at Submission:

Troutlodge, Inc.
PO Box 1290 Sumner, WA 98390

EIN/Tax ID: 910765447
Number of Employees: N/A
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No