Evaluation location: Washington, United States
Beta grown through 2018 - 2020Descriptor data collected from plants grown for seed increase. After vernalization, all plants were grown in greenhouses with day temperatures set between 15.5 C (60 F) and 18.3 C (65 F). All plants were planted in Sunshine TM #4 soilless potting media in 2 gallon pots (6 inch pots were used for certain annual accessions) and given 22 hour day lengths (supplemented with a combination of high pressure sodium and metal halide lights). Once bolting was initiated plants were fertilized every 7-10 days with 10-30-20 (N-P-K) Blossom Booster fertilizer and STEM micronutrients (11 1/3 tbsp fertilizer and 1/4 tsp. STEM /gallon for use with 15:1 hozon siphon proportioner). Vernalization protocol was as follows:
First venalization was of 10-12 week old seedlings in rootrainersTM (in SunshineTM #4 media) for a minimum of 4 months at 4 C with 12 hrs light and watered as necessary.
Subsequent re-vernalizations were of adult plants, trimmed and cleaned of debris, in 2 gallon pots for a minimum of 4 months at 4 C, 12 hrs light, and watered as necessary.
Some accessions require 2 or more re-vernalizations for the entire population to flower.
If bolted plants produced a good quantity of seed they were thrown out;only non-bolted plants were revernalized. If bolted plants didn't produce a good quantity of seed, all plants were saved and revernalized. Bolting 2 data is % of plants vernalized.
Erysiphe
Descriptor data collected from plants grown for seed increase in the greenhouse.
Ratings for Erysiphe susceptibility were made based on natural infection. No inoculations were made.