中熟晚粳“92—12”是上海市宝山区农业良种繁育场科技人员在主攻高产的基础上,向优质、食味佳、营养价值高方向发展而培育的新品系。1 产量表现 根据近三年的生产试种调查表明:一般生产种植,亩产500～600kg,与大田当家品种“宝农2号”、“秀水61”相仿。1992年区良种场鉴定试验,亩产为642kg,比对照“丙88—122”亩产增2.4％;1993年参加区水稻育种攻关中试鉴定:亩产565kg,与对照 Middle-late japonica rice “92-12” is a new line cultivated by high-quality, good taste and high nutritional value based on the main high-yielding scientific and technological personnel of the breeding field of agricultural varieties in Baoshan District, Shanghai. 1 Yield performance According to the survey of production trials in the past three years, it shows that the general production is planted with a yield of 500-600 kg per mu, similar to that of “Baonong No. 2” and “Xiushui 61”. In 1992, the district elite field test showed that the yield per mu was 642kg, which was 2.4% higher than that of the control “C 88-122”. In 1993,