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84-19
1. 84-19 was developed through three cycles of recurrent phenotypic selection within WL 316. In cycle one, the Syn 1 population of WL 316 was sequentially screened for resistance to Phytophthora root rot and bacterial wilt. Seventy-six resistant selections were intercrossed and the resultant generation screened again for Phytophthora root rot resistance with 220 plant selections comprising the parents for cycle two. The cycle two population was then sequentially screened for resistance to stem nematode and Verticillium wilt. One hundred seventy parent plants were intercrossed in the third (final) cycle. The estimated germplasm source contributions are M. varia - 15%, Turkistan - <2%, Flemish - 79%, Chilean - 3%, with a trace of M. falcata and Ladak. 2. 84-l9 is adapted for hay, haylage and dehydrated forage production in the northern half of the U.S. It has been tested for yield in MD, IL, IA, WI, WA and OR and is intended for use throughout its area of adaptation. 3. Flower colors approximate 81% purple, 15% variegated, 2% cream and 2% yellow. 84-19 is moderately fall-dormant with growth during the fall similar to Saranac. 4. 84-19 has high resistance to bacterial wilt, Phytophthora root rot, Fusarium wilt and anthracnose (Race 1); resistance to Verticillium wilt, stem nematode and pea aphid; moderate resistance to northern root knot nematode and low resistance to spotted alfalfa aphid. Reaction to blue alfalfa aphid has not been adequately tested. 5. Breeder seed (Syn 1) was produced on 170 parent plants under cage isolation at Warden, WA. Foundation seed (Syn 2) is being produced near Nampa, ID in sufficient quantity for the variety's expected life. One generation of breeder (Syn 1), two generations each of foundation (Syn 2 or 3) and certified (Syn 3 or 4) seed is recognized. A maximum of 3 and 5 harvest years are permitted on fields producing foundation and certified seed, respectively. Foundation seed must be grown above 40 degrees north latitude. 6. Certified seed will be marketed in 1988. 7. No decision regarding Plant Variety Protection has been made. 8. The information in this application is made available to the PVP Office.
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