The Dynamics of a Dry Matter Accumulation in the Initial Period of Growth of Four Varieties of the "stay-green" Type of Maize (Zea mays L.). | [Pakistan Journal of Botany • 2017]

Author(s):

1. PIOTR SZULC: Department of Agronomy, Poznań University of Life Sciences,Dojazd 11, 60-632 Poznań,Poland

2. JAN BOCIANOWSKI: Department of Mathematical and Statistical Methods, Poznań University of Life Sciences,Wojska Polskiego 28, 60-637 Poznań,Poland

3. KAMILA NOWOSAD: Department of Genetics, Plant Breeding and Seed Production, Wroclaw University of Environmental and Life Sciences,Grunwaldzki 24A, 53-363 Wrocław,Poland

4. MAGDALENA RYBUS-ZAJĄC: Department of Plant Physiology, Poznań University of Life Sciences,Wołyńska 35, 60-637 Poznań,Poland

5. HUBERT WALIGÓRA: Department of Agronomy, Poznań University of Life Sciences,Dojazd 11, 60-632 Poznań,Poland

6. TADEUSZ MICHALSKI: Department of Agronomy, Poznań University of Life Sciences,Dojazd 11, 60-632 Poznań,Poland

Abstract:

The aim of the study was to determine the impact of weather conditions (temperature, precipitation) on the dynamics of dry matter accumulation and nitrogen nutritional status of maize plants in the type of „stay-green”. Four varieties were evaluated: NK Cooler, Delitop, NK Gazelle, NK Ravello. Thermal conditions and humidity in the period from sowing to the phase of 5-6 leaves (BBCH 15/16) shaped the dynamics of dry matter accumulation and nitrogen nutritional status of plants. The differences were found in tested varieties of „stay-green” in terms of the dynamics of initial growth, expressed by the dynamics of dry matter accumulation and their nitrogen nutritional status. In most of the analyzed characteristics, the variety of NK Cooler was characterized by favorable values of these characteristics, as compared to other varieties. The genetic variation of tested varieties is derived from the heterosis cultivation process of F1 hybrids. Currently, cultivated maize varieties (including „stay-green”) are F1 hybrids characterized by identical genotype and varietal differences arise from components of parental hybrid genotype (paternal and maternal), as presented in the paper.

Page(s): 1017-1022

DOI: DOI not available

Published: Journal: Pakistan Journal of Botany, Volume: 49, Issue: 3, Year: 2017

Keywords:

chlorophyll , temperature , nitrates , rainfall , Zea mays L , Initial growth , Staygreen , Nitrate reductase

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