Crops ›› 2019, Vol. 35 ›› Issue (1): 186-190.doi: 10.16035/j.issn.1001-7283.2019.01.030

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Effects of DA-6 Treatment at Post-Anthesis on Seed Vigor of Maize Inbred Zheng 58

Haosheng Li,Yan Li,Chenglai Wu,Linmao Zhao,Chunqing Zhang   

  1. College of Agronomy, Shangdong Agricultural University/State Key Laboratory of Crop Biology, Tai’an 271018, Shandong, China
  • Received:2018-07-09 Revised:2018-11-11 Online:2019-02-15 Published:2019-02-01
  • Contact: Chunqing Zhang

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Abstract:

As an efficient plant growth regulator, DA-6 had significant effects on crop yield-increasing, stress-resistance, disease-resistance, quality-improving, and early-maturity, however the research about their effect on seed vigor was limited. In this study, a maize inbred line Zheng 58 was used as a test material. 6g/L DA-6 was uniformly sprayed on plant leaves at 0, 5, 15, 25, and 35 days after anthesis (DAS) to study its effects on plant seed vigor. The results showed that spraying DA-6 at different growth stages could increase the protein content of seeds to different levels, and subsequence affect the seed vigor. By comparing to CK, the effect on seed vigor by spraying of DA-6 gradually increased with the postponing of treatment time. The treatment at 35 DAS, the seed vigor index reached a maximum value of 0.77, which was 0.10 higher than that of CK. Therefore, the spraying of DA-6 on maize inbred line Zheng 58 at 35 DAS could increase the seed vigor of maize effectively.

Key words: DA-6, Maize inbred Zheng 58, Chemical composition, Seed vigor

Fig.1

Effects of DA-6 treatment on seed vigor of maize Different small letters indicate significant difference (P<0.05), the same below"

Table 1

Relationships between seed vigor and seed related traits"

指标Index 千粒重
1000-grain weight		 苗干重
Seedling dry weight		 蛋白质含量
Protein content		 油脂含量
Oil content		 淀粉含量 Starch content 出苗率Emergence rate 发芽指数Germination index 活力指数 Vigor index
千粒重
1000-grain weight		 1.000
苗干重
Seedling dry weight		 0.400 -1
蛋白质含量
Protein content		 0.498 -0.549 -1
油脂含量
Oil content		 -0.683 -0.260 -0.218 -1
淀粉含量
Starch content		 -0.251 -0.383 -0.894* -0.464 -1
出苗率
Emergence rate		 -0.352 -0.000 -0.566 -0.913* -0.730 1
发芽指数
Germination index		 0.382 -0.206 -0.836* -0.379 -0.822* 0.707 1
活力指数
Vigor index		 0.465 -0.869* -0.841* -0.023 -0.705 0.382 0.661 1

Fig.2

Regression analysis of related characters of seed vigor"

Fig.3

Effects of DA-6 on 1000-grain weight of maize at different stages after pollination"

Fig.4

Effects of different treatments on maize chemical composition"

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