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].

"中油杂501"由油料所王汉中院士团队历时十年攻关培育而成，是我国油菜育种领域的重大标志性成 果，区域试验平均含油量达50.38%，亩产油量107.35公斤，比对照高26.93%，且菜籽优于国际双低标准 （低芥酸、低硫苷），营养价值突出。 4月27日，从在四川邛崃召开的油菜"迟播双密双高"技术观摩会传来消息：中国农业科学院油料作物研 究所培育的耐迟播、耐密植、高产高油多抗油菜新品种"中油杂501"配套适期迟播密植高产高油多抗新 技术（"迟播双密双高"技术），即将迎来大面积高产。4月26日，经中国作物学会组织专家田间评价， 在邛崃260亩示范田理论亩产达341.47公斤，高出四川省油菜平均单产水平一倍左右。 近年，我国油菜年种植面积达1.17亿亩，产油量占国产油料作物产油量的半壁江山，提升油菜产能对保 障食用油供给安全意义重大。 针对倒春寒危害、冬闲田面积较多、根肿病高发等问题，油料所联合相关单位，以"中油杂501"等为基 础，创新研发"迟播双密双高"技术，将播期推迟至10月10日以后，有效缓解了稻油轮作茬口矛盾、减少 了早播导致的冬前早花和根肿病风险，结合高密机械化联合精量播种、油菜全营养缓释配方施肥、精准 ...