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在1980—82年的新杂交试验中,发现南杂7513×综737无论正反交均发生类似高温灼伤的症状。在三年试验中,有两年较严重。具体表现为:在玉米抽雄以前,上部叶片卷曲变白,轻者,随着植株不断生长,除受害部分干枯外,其余逐渐恢复正常。重者,干枯的叶片包住雄穗,难以抽出,雌穗受影响,表现出穗迟、吐丝慢、果穗小等。在不同株间表现严重程度不同,因而对植株、果穗、产量等影响也不同,(见下表)。
In the new hybridization test in 1980-82, it was found that similar symptoms of high temperature burns occurred in both Nansha 7513 × Comprehensive 737 in both positive and negative crosses. In the three-year trial, two years more serious. Specific performance: Before tasseling corn, the upper leaves curly white, light, with the continuous growth of plants, except for the victim part of the dry, the rest gradually returned to normal. In severe cases, the dry leaves wrapped tassels, difficult to extract, the ear affected, showing spike, silky slow, small ears and so on. The performance of different strains of different severity, so the plant, ear, yield and other effects are also different (see table below).