“91228”是1971年用“九一晚籼”作母本,“IR22”作父本杂交,经六代选择1975年定型的籼稻品系。1976年参加晚籼组品系比较(一次重复,小区面积0.02亩),亩产767.5斤,居第一位,比“洞 “91228” is a 1971 indica line with the “Nine-night late indica” as the female parent, “IR22” as the male parent, and the six-generation selection of the 1975 stereotype. In 1976 to participate in late indica group comparison (a repeat, plot area of ​​0.02 acres), yield 767.5 pounds, ranking first, than the "hole