engleski

Response of S1 maize progeny to nitrogen deficiency stress in a recurrent selection program

Nitrogen is one of the most important nutrients for plant development. It is also significant economical factor in intensive plant production systems and responsible for agriculture related pollution. Cultivars with high nitrogen use efficiency (NUE) would therefore be interesting for production. It was expected that Maksimir 3 Synthetic (M3S) maize population had genetic variability for NUE, because it was derived from local corn varieties used in low-input production systems. Field trial including 196 maize S1 progenies from third cycle of recurrent selection in M3S maize population was conducted at three locations during the 2007 growing season. Two rates of nitrogen, 0 kg ha-1 and 150 kg ha-1, were applied in order to detect response of the S1 progenies to nitrogen deficiency stress. In the nitrogen stress environment (0 kg N ha-1), yield was reduced significantly 9.09%, ear height 4.13%, and leaf length and width 2.36% and 4.30 %, respectively. Correlations between yield per plant and plant height were r = 0.46 and r = 0.53 in nitrogen stress and non stress environment, respectively. Between yield and other traits correlations were week and ranged from r = -0.09 to r = 0.32 in both environments. Moderate and positive correlation between yield in the stress and yield in the non stress environment (r = 0.40), indicates that successful identification of nitrogen use efficient genotypes could be done in low nitrogen environments, as suggested for improving NUE by several authors.

nitrogen stress; maize; recurrent selection; nitrogen use efficiency; NUE

Rad je prezentiran na skupu VIII. Alps-Adria Scientific Workshop "Crop production and plant protection", održanom od 27.04.-02.05.2009., Neum, Bosna i Herzegovina.