WL 605
1. WL 605 is a synthetic variety consisting of 177 clones that trace to two experimental WL varieties and to germplasm derived from CUF 101, Siriver and three germplasm releases from the Univ. of California, namely, UC 123, UC 143, and A 77-lOB. Component populations had been screened for resistance to Phytophthora root rot, Fusarium wilt and spotted alfalfa aphid. The 177 parental plants were identified following two cycles of phenotypic recurrent selection for resistance to blue alfalfa aphid and for tolerance to anthracnose.
2. Adapted to the Southern region of the U.S., particularly the southern portion of the southwest. WL 605 has been tested in California and Arizona and will be used in areas that have a similar environment.
3. WL 605 is a very non-dormant variety that has purple flowers (100%) and an erect growth habit. Fall dormancy is similar to CUF 101.
4. WL 605 has high resistance to Phytophthora root rot, spotted alfalfa aphid, blue alfalfa aphid, pea aphid, and Fusarium wilt; and moderate resistance to stem nematode. It is susceptible to bacterial wilt and anthracnose.
5. Seed classes are breeder (Syn 1), foundation and certified, limited in stand age to 1, 3 and 5 years respectively.
6. WL 605 will be offered for sale in 1986.
7. Application will be made for Plant Variety Protection, under the certification option.