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United States Department of Agriculture

Agricultural Research Service

Virtual Tour - NAGP
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Samples are collected from animals from all over the U.S.

Shorthorn cows in Nebraska.  Shorthorn cows in Nebraska.

 Navajo women with a churro sheep.  Navajo Churro sheep in Arizona.

Upon arrival, sample viability is evaluated using computer assisted sperm analysis (CASA).  Evaluating sample viability in the laboratory.

Semen samples are cooled to 5°C and cryoprotectants are added.  Samples are then packaged with an automated straw filler and labeler.

 Filled, sealed, and labeled semen straws. Example of filled, sealed and labeled straws ready to be cryopreserved.

 Straws in a programmed cooling apparatus.

Straws are cooled to -140°C using a programmed cooling apparatus, and then they are plunged into LN2.

 

Once samples have received proper cooling treatments, they are placed in cryovats for long term storage. >

 Straws being placed in cryovats.

 Animal-GRIN database form. Information about sample provenance and semen storage location is entered into the Animal-GRIN database.

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Last Modified: 11/12/2013
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