【摘要】 对６个中熟玉米品种在我国西南地区不同纬度和海拔高度的灌浆期、千粒重、株高和穗位高的变异与纬度和海拔的关系进行了分析。结果表明，品种的上述４个性状与纬度和海拔之间均表现为二元线性回归关系，模型对性状的决定程度达９０％以上。当海拔高度不变，纬度每升高１°，灌浆期平均延长１．１３±０．０３８ｄ，千粒重、株高和穗位高分别平均增加９．８２±０．０８１ｇ、８．２２±０．９４１ｃｍ和３．４０±０．５０８ｃｍ；纬度不变，海拔每升高１００ｍ，灌浆期平均延长１．３３±０．１４９ｄ，千粒重、株高和穗位高增加不明显。这些结果年度间、品种间表现出高度的一致性更多还原

【Abstract】 The variations of grain filling period, 1000 kernel weight, plant height and ear height with latitude and altitude were studied using 6 medium maturing maize varieties grown in Southwest China. The results indicated that the relationships of the above 4 traits with latitudes and altitudes could be described by dualistic linear regression equations, which are able to predict more than 90% variations. When altitudes remained unchanged, each increment of one degree in latitudes resulted in an additional increase of 1.13±0.038d for grain filling period, 9.82±0.081g for 1000 kernel weight, 8.22± 0.941 cm for plant height and 3.40±0.508 cm for ear height; When latitudes remained unchanged, each increment of 100 m in altitudes made the grain filling period 1.33±0.149 d longer, and 1000 kernel weight, palnt height and ear height were not significantly increased. The results were highly uniform among years and varieties.更多还原