Rapeseed is one of the most effective oil crops for oil production. China is the largest rapeseed producer in the world, in which more than 80% of the plant area is occupied by Brassica napus. In the middle and lower valley of the Yangtze River in South China, the largest cultivated region for rapeseed, the soil available P concentration is usually lower than 10 mg/kg. However, B. napus has high P requirement for its optimal seed yield and quality. Hence, the development of cultivars with enhanced phosphoru...