矮秆大穗小麦品种郑麦920的选育及提质增效栽培技术OA

Zhengmai 920 is a new wheat cultivar developed by Wheat Research Institute of Henan Academy of Agricultural Sciences in 2013 using the cross combination Zhengmai 1290×Cunmai 15,designed based on specific breeding objectives.Through accelerated summer generation advancement and six consecutive years of selection and evaluation,the line was developed through the pedigree method into a dwarf,large-spike,high-yield and stable-yield cultivar.The cultivar was officially approved in 2025 by Henan Provincial Crop Variety Approval Committee,with the registration number of Yushenmai 20252047.From 2021 to 2024,the wheat cultivar Zhengmai 920 was evaluated in regional and production trials conducted by the irrigated-field group of Henan Wheat Industry Technology Innovation Strategic Alliance.Plant height of Zhengmai 920 remained stable across years,ranging from 72.7 to 75.4 cm.The three-year mean adjusted yield reached 8 382.0 kg/hm2,representing an average increase of 6.39％compared with the control cultivar Bainong 207.Moreover,over 90％of the test sites exhibited yield increases of≥3.0％,indicating high yield potential and stable performance.This paper summarizes the breeding process,characteristics,yield performance,and cultivation techniques for enhancing quality and production efficiency of Zhengmai 920,providing technical support for its demonstration,promotion,development and utilization.