根据本地区红小豆育种目标，对大面积推广的京农２号品种利用辐射诱变手段进一步加以改良．经过１９９２～１９９８年７年的选育，育成具有适宜夏播、植株直立、高产、大粒、抗病等优良性状的新品种京农５号． According to the goal of adzuki bean breeding in this area, the method of radiation mutagenesis was further improved on the large-scale popularization of Beijing-Nong No.2 variety. After breeding for 7 years from 1992 to 1998, a new variety Jingnong 5 with good traits such as summer sowing, plant upright, high yield, big grain and disease resistance was bred.