Evaluation location: Washington, United States
Beta grown through 2010 - 2014Descriptor 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.
For an xlsx file of the evalaution data.