Multileaf
1. Multileaf was selected after five cycles of selection for the multifoliolate character and resistance to bacterial wilt from an initial population of 11 plants which exhibited a low expression of the multifoliolate character. The percentage of germplasm from each variety in the initial population was : Narragansett, 42% DuPuits, 25%; Socheville, 10%; A-225, 10%; unknown, 9%; and Vernal, 4%.
2. Multileaf is adapted to New York. It has been tested extensively in New York and is now under test in nearby areas. It will be recommended for New York.
3. Multileaf is a winter hardy variety with fall dormancy similar to Saranac. The flower color is approximately 86% purple, 14% variegated (blue), and a trace variegated yellow. Approximately 99% of plants exhibit the multifoliolate character. The parental clones vary from 55% to 85% of their leaves multifoliolate.
4. Multileaf has high resistance to bacterial wilt. It is susceptible to anthracnose and Phytophthora root rot. It has not been tested for pea aphid, spotted aphid or stem nematode and is assumed to be susceptible.
5. Seed increase is limited to three generations: Breeder (Syn 1), Foundation (Syn 2) and Certified (Syn 3) seed classes. Breeder seed is produced from interpollination of 130 parent clones by honey bees in a plant growth chamber in Ithaca, N.Y. Foundation seed may be produced from Breeder seed in the Northern Region for up to 3 years including the seeding year. Certified seed may be produced from Breeder or Foundation seed for no more than 6 years including the seeding year if seed is produced.
6. Certified seed is planned for limited availability in 1980 and 1981.
7. Multileaf has been assigned Plant Variety Protection Certificate #7300100.