Abstract:

By analyzing the ability of high-yield, stress-resistance, wide adaptability of the national approved wheat ‘Longyu No.5’ and its promotion strategy, the study aims to provide references for high-efficiency breeding and variety promotion of dry land wheat in north China. The characters of new winter wheat variety ‘Longyu No.5’ were analyzed by using the regional experiment and high yield demonstration data of multiple points in north China’s dry land area, including Longdong of Gansu Province. The average yield of ‘Longyu No.5’ was 4922.54 kg/hm², which was 13.28% higher than that of the control variety, and the yield increasing point (times) rate was 89.97%. The effective ear number was 5.97 million/hm², the harvest index was 39.6%, and the yield potential in dry land was 6399.0 kg/hm². In general, more ears and higher harvest index are the basis of realizing high yield potential; cold resistance, drought resistance and disease resistance, high temperature tolerance at later growth stage and small variation of grain weight are the important guarantee for wide adaptability and large-scale extension of ‘Longyu No.5’. In the promotion and application of the variety, the model should include project-based promotion, order-based seed production, contract-based seed breeding, and efforts from research units, local governments, seed industry enterprises and demonstration farmers.

Key words: Winter Wheat, ‘Longyu No.5’, High Yield, Adaptability, Extension Model