Core Viewpoint - The development of the new rapeseed variety "Zhongyouza 501" represents a significant achievement in China's oilseed breeding sector, showcasing high yield and oil content, which is crucial for enhancing domestic edible oil supply security [2][3]. Group 1: New Variety Development - "Zhongyouza 501" was cultivated by a team led by Academician Wang Hanzhong over ten years, achieving an average oil content of 50.38% and a yield of 107.35 kg per mu, surpassing the control by 26.93% [2]. - The variety set new yield records in multiple regions, including 419.95 kg per mu in Hubei and 303.8 kg per mu in Jiangsu, demonstrating its resilience and high productivity under adverse conditions [2][3]. Group 2: Technological Innovations - The "Late Sowing Double Density Double High" technology, developed alongside "Zhongyouza 501," allows for delayed sowing past October 10, mitigating risks associated with early sowing and enhancing yield stability [3][4]. - This technology integrates high-density mechanized precision sowing, nutrient release fertilization, and comprehensive disaster prevention measures, supporting the expansion of rapeseed cultivation and yield improvement [3][4]. Group 3: Industry Support and Outreach - The Chinese Academy of Agricultural Sciences has established an expert team to provide extensive technical support across major rapeseed-producing provinces, conducting over 500 technical service sessions and training more than 58,000 individuals [4]. - The initiative aims to promote the adoption of high-yield varieties and innovative cultivation techniques, significantly impacting local agricultural productivity and contributing to national edible oil supply stability [4].

Core Insights - The new rapeseed variety "Zhongyouza 501" developed by the Chinese Academy of Agricultural Sciences is set to achieve large-scale high yields with the accompanying "late sowing double density double high" technology [1][2] - The average yield in a demonstration field reached 341.47 kg per mu, approximately double the average yield in Sichuan province [1] - The annual planting area of rapeseed in China is around 117 million mu, making improvements in rapeseed yield crucial for ensuring edible oil supply security [1] Group 1 - "Zhongyouza 501" has an average oil content of 50.38% and an oil yield of 107.35 kg per mu, which is 26.93% higher than the control [1][3] - The "late sowing double density double high" technology addresses issues such as late spring cold damage and root swelling disease, allowing for sowing after October 10 [2] - The technology supports the expansion of rapeseed area, increases yield, and stabilizes production [2] Group 2 - "Zhongyouza 501" has been included in the 2024 agricultural leading varieties and the 2025 national excellent crop variety promotion directory by the Ministry of Agriculture and Rural Affairs [3] - The application of this technology in major rapeseed production areas is expected to alleviate land competition issues in the Yangtze River basin and increase rapeseed oil production by over a million tons annually [3] - The initiative aims to replace some imported soybean oil with low-erucic acid rapeseed oil, enhancing the health standards of edible oil for residents [3]