The Plant Introduction Stations of the federally-funded United States Department of Agriculture - Agricultural Research Service house the national collections of germplasm (fancy words for seeds, or the propagative stages of plants). Each station is responsible for certain plant species, and many varieties of each species are held in their facilities. (For example, the PI Station in Ames, Iowa houses the corn, cucumbers and sunflower seeds, to name a few, while soybeans, flax, cotton, etc. are held in other facilities. Seeds are stored in containers in cold storage (basically a huge walk-in refrigerator) to keep them from pathogens such as mold and bacterial infections. Seeds are collected from state universities and federal agricultural agencies as new hybrid lines are developed, and these are shared among the plant introduction stations in the U.S., and facilities and public and private agencies that request small numbers of seeds for research. To keep the germplasm collection at an optimal level, certain species are grown for seed increase each year. Research is also conducted to see which plant lines are more susceptible to disease and insect damage, and resistant lines are noted and retained so that the germplasm remains intact for future generations.
2007-03-08 08:51:47
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answer #1
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answered by Carol O 1
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http://www.csrees.usda.gov/nea/plants/in_focus/pbgg_if_npgs.html
http://www.scitechresources.gov/Results/show_result.php?rec=1076
http://www.uga.edu/~ebl/Vietnamese/seed%20policy.html
Goto these web sites , i hope you will get your answer
2007-03-08 07:58:07
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answer #3
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answered by MSK 4
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