Winter wheat under a water shortage environment: A dataset of yield formation parameters and above-ground biomass of twenty European genotypes
The datasets presented in this data article are raw data and supporting material for the study “Yield formation parameters of selected winter wheat genotypes in response to water shortage,” available at: https://doi.org/10.3390/agronomy12040831. Twenty European winter wheat genotypes differing in their countries of origin were grown in a potted experimental design under ambient weather conditions in the vegetation hall (warm temperate climatic zone of Brno, Czech Republic) until their transfer to the phenotyping platform of a PlantScreenTM Modular System at Photon Systems Instruments, Ltd. (Drásov, Czech Republic) to simulate natural continual drying, as common during drought spells. The pots were divided into two categories: (i) drought-stress (continual drying of plants until 15% of the maximum soil water capacity [SWC], corresponding to the permanent wilting point) and (ii) control (plants were maintained at 70% of SWC) treatments that were applied from the beginning of stem elongation (DC 30; Zadoks decimal codes) to the grain development stage (DC 73–75). When 15% of the maximum SWC was reached in drought-stress treatments (after 32 days; equal to the DC 61–65 developmental stages), the experiment was terminated, and the drought-stressed plants were irrigated to 70% of SWC followed by 17 days of recovery. The plants were transported back to the vegetation hall after 49 days (at developmental stages DC 73–75). The responses of the genotypes to the different water treatments were evaluated by final yield formation parameters for main spikes at the fully ripe stage (DC 92) when all parts of the above-ground biomass of the plants were manually harvested and dried for 12 hours at 105 °C. The datasets can be implemented into crop growth models to improve predictions of future winter wheat production under changing climatic conditions and can contribute to decision-making processes during genotype selection for drought-prone cultivation areas. Raw data of above-ground biomass for main spikes of twenty European winter wheat genotypes are presented in Table 1. The relative drought-induced reductions/increases are presented in Table 2. The results of one-way ANOVAs with Tukey's post-hoc test (α = 0.05, n ≥ 4) for each yield formation parameter within the drought-stress/control treatments are presented in Table 3.
Steps to reproduce
Raw data of manually harvested and subsequently dried (for 12 h at 105 °C in an automated oven) above-ground biomass for main spikes of twenty European winter wheat genotypes are presented (Table 1). One drought-stressed plant (pot) of Famulus and Faunus genotypes was broken prior to entering the ripening stage, and hence, raw data for 4 plants per treatment are available in these cases. Only 4 plants per treatment entered the experiment in the case of the Amerigo genotype (due to the limited capacity of the phenotyping platform); hence, raw Amerigo data also consisted of 4 plants per treatment. Damage to spikes of the Cubus genotype was observed, with a slight impact on data quality. The thousand grain weight (TGW) was calculated as TGW = (GWS/GNS) × 1000, where GWS is grain weight per the main spike and GNS is grain number per the main spike. The harvest index (HI) was calculated as follows: HI = GWS/[GWS + (GWSG - GWS) + SLW)], where GWSG is the weight of the main spike before extraction of grains and SLW is the weight of straw and leaves. The relative drought-induced reductions (DIR; expressed in %; Table 2) in the yield formation parameters were calculated by the following formula: DIR = [(AVGC - D)/AVGC] × 100, where AVGC is the arithmetic mean of all main spikes within the control treatment of a genotype and D is the value of the main spike within the drought-stress treatment of that genotype. Statistical analyses (Table 3) were performed using STATISTICA 12.0 software (StatSoft, Tulsa, USA).