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Chickpea flowering, carbon isotope, seed weight in a factorial of 20 genotypes and 8 environments

Citation

Sadras, Victor; Lake, Lachlan (2022), Chickpea flowering, carbon isotope, seed weight in a factorial of 20 genotypes and 8 environments, Dryad, Dataset, https://doi.org/10.5061/dryad.tx95x6b0f

Abstract

Chickpea was phenotyped for time to flowering, carbon isotope composition at peak biomass, and seed weight at maturity in a factorial combining 20 genotypes, 2 sowing dates, 2 sowing regimes over two seasons. 

Methods

A field experiment was established on a calcic luvisol at Roseworthy, South Australia (34o 52' S, 138o 69'E) that combined factorially 20 genotypes, two water regimes (dry, rainfed; wet, sprinkler irrigated), and two sowing times (early, early June; late, early-mid July). The experiment was repeated twice over successive seasons. Treatments were laid out in a split-split-plot design with three replicates, where sowing time was assigned to the main plot, water regime to the sub-plot, and genotypes randomised within each plot. Each plot comprised 6 rows, 0.24 m appart, 5-m long. We scored phenology weekly to establish the time to 50% of plants at beginning of flowering and calculated thermal time from sowing to flowering using a base temperature of 0 oC. To quantify crop water status, we measued carbon isotope composition at peak biomass, shortly after flowering using the method in Journal of Experimental Botany 67: 4339-4351. Seed weight was measured at maturity after drying and threshing 2-m2 plant samples.

Usage Notes

Missing values: flowering (1 out of 480), seed weight (20 out of 480), carbon isotope (21 out of 480). 

Funding

Grains Research and Development Corporation