WL 508
1. Phenotypic recurrent selection with the same germplasm as for WL 504 but continued for an additional three cycles. Following a serious pea and spotted alfalfa aphid attack in the fall of 1967, 95 plants highly resistant to both insects were selected. In addition, selection was based on freedom of symptoms of downy mildew and foliage diseases.
2. Adapted to the Southwestern U.S. for production of hay, silage, and dehydration. Areas tested were California, Arizona, and Mexico.
3. Purple to light purple flowers, moderately uniform growth habit. Nondormant - On January 18, 1969, WL 508 - 4.75", Moapa - 5.00", Mesa-Sirsa - 6.50", WL 504 - 4.75", and Lahontan - 2.00". Upright growth, frequent axillary branching, and tightly curled seed pods.
4. Fifteen (15) grams of seed of each selection was composited and planted in Kern County, California, to produce breeder seed of which 265 pounds is maintained in a sealed container. Foundation seed is the first generation seed produced from fields planted with breeder seed in the San Joaquin Valley, California. Certified seed will be produced from fields planted with either foundation or breeder seed. No other class or generation will qualify for certified seed.
5. 1971.