Peculiarities of the influence of plant growth regulators on the seed productivity of lines of parental components of maize hybrids

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Visnyk LNAU: Agronomy 2019 №23: 152-158

Peculiarities of the influence of plant growth regulators on the seed productivity of lines of parental components of maize hybrids

Buryak S., PhD student
ORCID ID: 0000-0002-3472-2269
Plant Production Institute named after V. Ya. Yuryev of NAAS

https://doi.org/10.31734/agronomy2019.01.152

Annotation

As a result of the determination and analysis of seed productivity in 2018, a positive reaction to the use of plant growth regulators of the parental component lines of maize hybrids has been noted. Eight lines of maze were used as the material for researches: four sterile analogue lines (Kharkivska 126 M, Kharkivska 215 M, Kharkivska 164 М, Kharkivska 155 М) and four sterility fixing lines (Kharkivska 126 ZМ, Kharkivska 215 ZМ, Kharkivska 164 ZМ, Kharkivska 155 ZМ). The studies included four treatment options.: 1) Without treatment (control plot); 2) Appetizer – spraying during the 4–5 leaf phase of the plant; 3) Nertus Planta Peg – pre-sowing seed treatment; 4) Nertus Plant Peg - pre-sowing seed treatment + spraying during the 4–5 leaf phase of the plant.

Among the sterile analogue lines, the best response to the use of plant growth regulators has been noted on the Kharkivska 126 M and Kharkivska 215 M lines. Thus, it was noted that all plots with plant growth regulators treatment significantly exceed the control plots in almost all indicators. Yields from plots with plant growth regulators treatment exceeded control plots by 20–27 % for the Kharkivska 126 M line, and by 9–17 % for the Kharkivska 215 M line.

Insignificant differences in comparison with control plots in all indicators and fewer amounts of significant differences in comparison with control plots has been noted on the Kharkivska 155 M and Kharkivska 164 M lines. Thus, on plots with all three treatment options on the Kharkivska 155 M line has been observed a significant difference compared to the control plots in terms of the weight of grain from the sample. According to the rest of the indicators, the difference in comparison with control plots was noticeable but mathematically not considered as significant. Yields of seed from plots with plant growth regulators treatment exceeded control plots by 16 % for the Kharkivska 155 M line, and 18–24 % for the Kharkivska 164 M line.

Among the sterility fixing lines, the significant influence of plant growth regulators treatment on indicators of seed productivity has been noted on all lines, except for the Kharkivska 215 ZM line. The best response of plants to the use of plant growth regulators was noted on the Kharkivska 155 ZM and Kharkivska 164 ZM lines, where the seed yields from plots with plant growth regulators treatment exceeded control plots by 14–18 % and 15–18 %, respectively.

According to the results of the research in 2018, the best response to the plant growth regulators treatment has been shown on the Kharkivska 126 M, Kharkivska 215 M, Kharkivska 126 ZM, Kharkivska 155 ZM and Kharkivska 164 ZM lines. The spraying of plants with the plant growth regulator Appetizer in the phase of 4–5 leaves proved to be the most effective way to increase seed productivity, both on the lines of sterile analogues and on the lines of sterility fixers of maize.

Key words

maize, parental components, seed production, plant growth regulators, seed productivity

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