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The analysis of the NSW wheat variety database. I. Modelling trial error variance
- Cullis, B.R., Thomson, F.M., Fisher, J.A., Gilmour, A.R., Thompson, R.
- Theoretical and applied genetics 1996 v.92 no.1 pp. 21-27
- Triticum aestivum, genotype-environment interaction, crop yield, varieties, variety trials, variance, databases, sowing date, New South Wales
- The retrospective analysis of a large database on wheat variety testing in New South Wales (NSW) is considered. This analysis involved three key steps. Initially error variance heterogeneity is modelled, indicating significant differences in error variance due to trial location, year of trialling, sowing date and trial mean yield. The implication of this modelling for the estimation of variance components is discussed.