玉米耐低钾胁迫鉴定指标的筛选

Selection of the Appraisal Guideline of Bearing Low-K in Maize

在缺钾土壤上种植耐性不同的玉米杂交组合,进行耐低钾鉴定指标的筛选试验。以穗粒重胁迫指数为标准,对玉米植株和穗部性状胁迫指数等参考指标进行相关分析。结果表明:苗期叶片症状指数与穗粒重胁迫指数具有极其显著的相关性,因此,采用苗期叶片症状指数作为鉴定指标,具有快速鉴定、早期筛选、省工省时、节约试验用地等优点。

Crosses with different endurance of low-K were planted in the field short of K to select the appraisal guideline of bearing low-K in maize.The correlation between the stressing index of grain weight per ear and the stressing index of plant characters or that of the ear characters were studied.The result showed that there were sig-nificant correlation between the index of leaf symptom in seeding period and the stressing index of grain weight per ear.Using the index of leaf symptom in seeding period as the appraisal guideline had lots of advantages,such as ap-praising rapidly,selecting early,saving labor and field,and so on.