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  1. Vol. 12 No. 1, p. 33-34
     
    Received: July 16, 1971
    Published: Jan, 1972


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doi:10.2135/cropsci1972.0011183X001200010011x

Variation and Selection for Preharvest Seed Dormancy in Safflower1

  1. L. H. Zimmerman2

Abstract

Abstract

Selection for preharvest seed dormancy had two aspects: selection for low or no germination in the head at maturity, followed by selection for short-term seed dormancy as shown by high germination after a period of seed storage. No domestic safflower (Carthamus tinctorius L.) had 20% or less germination in the head; however, a high frequency of wild Carthamus species did. Short-term dormancy was also found in wild species. Selections of Carthamus palaestinus Eig, which readily interbreed with domestic safflower, had as little as 7% germination with seeds stored for 3 weeks after harvest and as much as 100% with seeds stored for 19 weeks.

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