Acta Agriculturae Boreali-Sinica ›› 2023, Vol. 38 ›› Issue (1): 117-123. doi: 10.7668/hbnxb.20193524

Special Issue: Drought and water saving Cultivation & Physiology

• Tillage & Cultivation·Physiology & Biochemistry • Previous Articles     Next Articles

Comparative Analysis of Drought Resistance of Luyu 13 Parents

ZHANG Wenzhong, ZHAO Jinfeng , LU Ming, WANG Huihui   

  1. Institute of Millet,Shanxi Agricultural University,Changzhi 046011,China
  • Received:2022-08-22 Published:2023-02-28

Abstract:

Luyu 13 is an excellent maize hybrid bred by the Millet Research Institute of Shanxi Agricultural University.It has strong drought and stress tolerance,and has achieved remarkable social benefits.In order to compare the drought and stress tolerance characteristics of the parents 1572 and Hai 921 of maize hybrid Luyu 13,we analyzed the related parameters of seed germination and seedling growth under simulated drought stress with 20% PEG solution.Results showed that there was no significant difference in the germination parameters between Luyu 13,1572 and Hai 921 under normal conditions,but the germination rate,germination energy,germination index and sprout index were inhibited under drought conditions,while the inhibition degree of Hai 921 was significantly higher than that of 1572 and Luyu 13.These results showed that the seed vigor of 1572 was higher than that of Hai 921,indicating inbred line 1572 had higher germination rate and germination advantage under drought stress,and possess stronger adaptability to drought.Subsequently,the important stresses response genes,ZmCIPK16 and ZmSAM1,were selected and analyzed their expression in 1572 and Hai 921 inbred lines under different abiotic stresses at seedling stage and under drought stress at different growth stages by Real-time PCR.Results showed that ZmCIPK16 and ZmSAM1 were widely responses to drought,salt,low temperature,high temperature,and ABA at seedling stage of 1572 and Hai 921 and responses to drought at different growth stages.ZmCIPK16 and ZmSAM1 showed more actively participated in the response to drought and other stresses in 1572.These results indicated that the inbred line 1572 was an excellent germplasm with drought and stress tolerance,and its contribution to drought resistance of hybrid Luyu 13 was greater than that of inbred line Hai 921.

Key words: Luyu 13, Inbred line 1572, Drought, Gene expression

Cite this article

ZHANG Wenzhong, ZHAO Jinfeng, LU Ming, WANG Huihui. Comparative Analysis of Drought Resistance of Luyu 13 Parents[J]. Acta Agriculturae Boreali-Sinica, 2023, 38(1): 117-123. doi: 10.7668/hbnxb.20193524.

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