Associations between Plant Density and Yield Components Using Different Sowing Times in Wheat (Triticum aestivum L.)

Abstract

The yield potential of wheat depends not only on genetic × environmental interactions, but also on various agronomic factors such as sowing date or the seed rate used for sowing. The main aim of this work was to determine possible correlations between the effects of different sowing dates and plant densities on the yield components of a collection of 48 wheat genotypes. Two-way analysis of variance on the data revealed that both sowing date and plant density, as main components, only had a minor effect on the yield component patterns. Correlation analysis, however, indicated that the sowing date had a greater effect on the yield components, while plant density was in closer correlation with the heading time (r = 0.90). The patterns determined for individual yield components at two different sowing dates and plant densities showed significant differences for spike length, spike fertility, grain number in the main spike, number of productive tillers, grain number on side tillers, mean grain number and grain weight. Genotypes that carry the winter (recessive) alleles of genes regulating vernalisation processes (VRN-A1, VRN-B1, VRN-D1) and the sensitive (recessive) alleles of the two genes responsible for photoperiod sensitivity (PPD-B1, PPD-D1) may have better tillering and consequently higher grain yield, though this may depend greatly on the year.

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Kiss, T., Balla, K., Bányai, J. et al. Associations between Plant Density and Yield Components Using Different Sowing Times in Wheat (Triticum aestivum L.). CEREAL RESEARCH COMMUNICATIONS 46, 211–220 (2018). https://doi.org/10.1556/0806.45.2017.069

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Keywords

  • seeding density
  • yield components
  • sowing time experiment
  • wheat (T. aestivum L.)