2024 Breeza Long Coleoptile Wheat Trials: Multi-Environment Evaluation of Genotypic and Agronomic Interactions Across Depth, Seed Size, and Water Regimes

This dataset comprises comprehensive agronomic and phenotypic data from the 2024 long coleoptile wheat trials conducted at Breeza, New South Wales, Australia. The trials include four major experiments: N_MET_24 (multi-environment trial), N_Durum_24 (durum wheat trial), Seed_size (seed size and depth interaction), and Victrado (water regime and depth interaction). The trials were established on 36 ranges with 5 rows per bed, 2-meter bed centres, and 11-meter ranges (10.8 meters planted). Fertilisation included 238 kg/ha of urea and 70 kg/ha of Granulock Z Extra Treated starter. Herbicide applications included Axil Xtra, Starane, MCPA, and Metsulfuron. Sowing occurred in two time-of-sowing (TOS) windows: TOS1 on 28 May and TOS2 on 4 July 2024. The trials evaluated multiple genotypes including Mace, Mace18, Scepter, Magenta, Magenta13, Calibre, Westcourt, V190245-6, and Sunchaser, under varying treatments such as sowing depth (4 cm and 12 cm), seed size (small and large), FCR resistance (plus/minus), and water regimes (well-watered and dryland). The dataset includes over 450 unique plots across the trials. Variables recorded include emergence and plant counts (outside and inside row counts, plants per square meter), seedling traits (depth and length), Zadok growth stage scores, dry biomass at GS32, and final harvest metrics such as yield (T/ha), protein content, test weight, grain weight, and grain size. Temperature logger data and phenological observations are also included. Data is structured across multiple sheets, each corresponding to a specific trial or measurement type, with consistent identifiers for site, trial, TOS, genotype, depth, and treatment. The dataset enables analysis of genotype-by-environment interactions, agronomic performance under deep sowing, and the influence of seed size and water availability on wheat establishment, growth, and yield.