Relationships Between Seeding Densities and Selection Parameters in Bread Wheat (Triticum aestivum L.) Genotypes under Rainfed Conditions

Year 2024, Volume: 10 Issue: 2, 127 - 133, 31.07.2024

İrfan Öztürk

Abstract

Agronomic approaches are important for high yield in changing environmental conditions such as climate and soil structure.
Drought and heat stress due to climate change require the determination of tolerant genotypes using different seeding
densities in bread wheat. The experiment was carried out in the Trakya Agricultural Research Institute experimental
field in the 2015-2016 and 2016-2017 growing cycles. In the research, 8 bread wheat genotypes and three different seed
densities of 400, 500 and 600 grains per square meter were used. The study was conducted in the randomized complete
blocks design. Data on, the number of spikes and grains per spike, the number of spikes per square meter, grain yield,
peduncle length and spike length, flag leaf area and normalized difference vegetation index were examined. In the study;
year, genotype and year×genotype interaction were significant. The mean grain yield was 6197 kg ha-1. Genotype G6
produced a higher grain yield with 7730 kg ha-1. The results of the research showed that there was no significant difference
between the seed densities for grain yield. However, it was observed that using 500 seeds per square meter had a higher
grain yield (6280 kg ha-1). The maximum peduncle length (31.04 cm) and spike length (8.94 cm) were determined in the
application using 400 seeds per square meter. The use of 400 seeds per square meter produced the maximum spikelet
number per spike (17.90). According to seeding density, the maximum number of spikelet’s (535.6) and flag leaf area
(24.51 cm2) were obtained when 500 grains per square meter were used.

Keywords

Wheat genotypes, seeding density, yield, yield component, physiological parameters

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