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Vacuum-Dried Pollen of Alfalfa (Medicago Sativa L.) Viable after Eleven Years¹

After 11 years in storage, the vitality of vacuum-dried pollen of alfalfa (Medicago saliva L.) was determined by placing the pollen on stigmas of blossoms of a malesterile clone, 20 DRC. Percent pod set of blossoms so pollinated ranged from 36 to 57; the number of seeds per pod ranged from 2.5 to 3.4. The data showed that pollen for breeding studies can be stored successfully for 11 years under the conditions used in this experiment, although some deterioration in viability occurred.

Key Words: Vacuum-drying • Pollen viability

² Research Agronomist and Agronomist (Research Assistant), Applied Plant Genetics Laboratory, Agricultural Research Center, ARS, USDA, Beltsville, Md. 20705.

Received for publication July 21, 1972.