1. DK 169 was developed from
LM 455 by one cycle of phenotypic selection for resistance to anthracnose,
bacterial wilt, Fusarium wilt, stem nematode, Phytophthora root rot and
spotted alfalfa aphid. Estimated germplasm sources are 2% M. falcata,
1% Ladak, 18% M.
varia, 15% Turkistan, 37% Flemish,
15% Chilean, 2% Peruvian with 9% unknown.
2. DK 169 is adapted to, and intended for use in the parts of the western region in which moderately dormant varieties are grown. DK 169 has been tested in NM, CA, NV and OR.
3. DK 169 is a moderately dormant variety with fall dormancy similar to Lahontan. Flower color of the Syn. 1 is approximately 92% purple, 6% variegated, 2% white with a trace of yellow and cream.
4. DK 169 is highly resistant
to the spotted alfalfa aphid; resistant to bacterial wilt, Fusarium wilt,
stem nematode, and pea aphid; moderately resistant to Verticillium wilt
and Phytophthora root rot; low resistance to the blue alfalfa aphid and
is susceptible to
anthracnose (Race 1). DK 169
has not been tested for resistance to Aphanomyces root rot and root knot
nematode.
5. Breeder seed (Syn. 1) was
produced in open isolation in 1984 and 1985 and bulked, with a sufficient
quantity held in storage for the life of the variety. Seed increase is
on a three generation basis with a 2, 3 and 6 year stand life permitted
for breeder (Syn. 1),
foundation (Syn. 2), and Certified
(Syn. 3) seed classes, respectively. Breeder seed productions is limited
to CA with foundation and certified seed production limited to CA, WA,
OR, or ID. Breeder seed will be maintained by FSRC and Ramsey Seed
Co.
6. Certified seed will be available in 1993.
7. No application will be made for Plant variety Protection.
8. Information in this application
may be given to the PVP Office.