1. NAPB 31 is a 59-clone synthetic variety. Parent clones were selected following 3-5 cycles of field screening for resistance to Verticillium wilt, from populations which have previously been screened for winter survival and resistance to Phytophthora root rot, anthracnose, bacterial wilt and Fusarium wilt. Parentage traces to Apollo (26%), Endure, Atlas, Armor, Thunder, Titan, Vernal, Weevlchek, Spredor, G 7730, Answer, Dk 120, Baker, Riley, Marvinskaja 425 and Krasnodarskaja Ranniaja (5% or less each). Germplasm sources are M. falcata (9%), Ladak (9%), M. varia(21%), Turkistan (22%), Flemish (30%), Chilean (5%), and Peruvian (4%).
2. NAPB 31 is intended for use in the northern region of the U.S. for hay, haylage, greenchop or dehy. It has been tested in Iowa, Illinois, Idaho and Wisconsin.
3. NAPB 31 is dormant variety with fall dormancy similar to Vernal. Flower color is approximately 68% purple, 32% variegated with less tan 1% cream and yellow.
4. NAPB 31 has high resistance to bacterial wilt, and Fusarium wilt and resistance to Phytophthora root rot, anthracnose, Verticillium wilt and downy mildew. It has not been adequately tested for reaction to stem nematode, pea aphid, spotted alfala aphid and blue alfalfa aphid.
5. Breeder (Syn. 2) seed was produced from Syn. 1 near Nampa, ID with a sufficient quantity for the expected life of the variety held in controlled storage. Two years production was bulked. Seed increase is limited to one generation each of breeder, foundation, and certified classes. Certified seed may be produced from breeder or foundation. A 3 and 6 year stand life is permitted on fields producing foundation and certified seed, respectively. Foundation seed production is limited to the northern region of adaptation.
6. Certified seed will be available in 1988.
7. No decision regarding application for Plant Variety Protection has been made.
8. Information contained in this application may be turned over to the PVP office.