Preliminary B (Stripe Rust) Winter Wheat Test

Objective:                   

To evaluate stripe rust resistance and agronomic performance of winter wheat varieties/breeding lines

Summary:

The nursery was planted under rainfed conditions on silt loam soil with management information available in Table 1. Wheat stripe rust was not observed in many cultivars until late June. The initial screening was conducted on June 10^th and only recorded rust appearance at a low percentage on a susceptible variety (Decade). A late rust screening in July was not used due to the interference of senescence. Breeding lines used had stripe rust resistance, so low stripe rust occurrence was anticipated in most varieties, though the June weather of 2018 did not favor the disease development, as indicated by the low infection rate that month.

All traits were significant except for protein and lodging. The average yield was 106 bu/A and ranged from 54.1 (Decade) to 126 (MT18103) bu/A. The average grain protein content was 12%. Test weight ranged from 50.8 (Decade) to 62.2 (MT1895) lb/bu. Thousand kernel weight ranged from 25.2 (Decade) to 41.9 (MT1897) grams. Plant height averaged 39.2 inches with the MT18102 being the tallest whereas MT1896 was the shortest. Heading date averaged 157 days.  Falling numbers ranged from 332 (SY Wolf) to 441 (MT18102) seconds.  Complete agronomic performance is shown in Table 2.

Table 1. Management information