超高产玉米品种穗部性状整齐度与产量的关系研究

Study on the Relationship Between the Ear Characteristic Uniformity and Yield of Super High-yielding Corn

对2个超高产玉米品种先玉335和郑单958在5个密度种植条件下的穗部性状整齐度与产量的关系进行了研究。结果表明,穗部各性状整齐度与产量均呈正相关,并且行粒数整齐度、穗粒数整齐度、穗位高整齐度均在7.5万株/hm2和9.0万株/hm2两个密度条件下最高;先玉335产量在9.0万株/hm2条件下最高,7.5万株/hm2时次之;郑单958产量在7.5万株/hm2密度下最为突出;两个品种的穗位高整齐度和行粒数整齐度均与产量的关系最为密切。行粒数整齐度和穗位高整齐度作为选择高产品种和采取适宜栽培措施的一项指标具有一定的可行性。

The relationship between the ear uniformity and yield of two super high-yielding corn, Xianyu335 and Zhengdan958 were studied, the results showed that there were positively correlated between the ear characteristics uniformity and yield, and the value of seeds per row uniformity, seeds per ear uniformity and ear height uniformity was the highest by planting in plant populations of 75 000 plants/ha and 90 000 plants/ha. Yield of Xianyu335 was the best by planting in 90 000 plants/ha and the better in 75 000 plants/ha, yield of Zhengdan958 was the best by planting in 75 000 plants/ha. There was closed relationship between ear height uniformity, seeds per row uniformity and yield. So, the ear height uniformity and seed per row uniformity could be used as a selection index for high-yielding corn cuhivars and taking feasible cultural measure.