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根据１９８９～１９９０两年吉、黑两省玉米区试汇总材料进行稳定性分析，采用适应性参数和回归系数作为判断标准，对于品种的丰产性、适应性采用联合方差分析方法，结果四单１９、本育９号、白单１６、九单１２等表现丰产，四单１６、龙１４０较丰产，四单１９、四单７３、吉单１４１、龙１３１、龙１４１等稳定性好，四单１９适应性广，可代替四单８号种植．
According to the stability analysis of the maize regional trial materials in Jilin and Heilongjiang provinces from 1989 to 1990, the adaptability parameters and regression coefficients were used as the criteria to determine the high yield and adaptability of the varieties. The results of four single 19 , Benyu 9, Baidan 16, Jiuandi 12 and other performance of the rich, four single 16, 140 more yielding, four single 19, four single 73, Kyrgyzstan 141, Long 131, Long 141 and other good stability, four single 19 wide adaptability, can replace the fourth single 8 planted.