Evaluation location: Iowa, United States
About 10 seed from each accession were germinated on paper towels and the 3-day-old seedlings were examined under an ultraviolet light. Remnant seed of nonfluorescent accessions were planted at the Bruner Farm near Ames, Iowa. Cross-pollinations were made between nonfluorescent accessions and the fluorescent root cultivars BSR 101 or Harosoy. Cross-pollinations were made between non fluorescent accessions and tow nonfluorescent testers, near isogenic lines Hark-fr1 and Hark-fr2.