Brian Cullis

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Competition modelling in sorghum plant breeding trials Background • In this example we consider data from the DEEDI sorghum breeding programme which extends their approach to incorporate information on pedigrees • This programme runs two separate pedigree breeding programmes, one for males and one for females • All field evaluation of lines within each sub-programme is undertaken using F 1 hybrids • The aim of each programme is to provide elite fully in-bred parental lines for commercial use within a hybrid breeding programme VSN Applied Statistics Conference 2011 Modelling variance structures of multi-term effects
Competition modelling in sorghum plant breeding trials Field trial design • Focus on a preliminary yield trial for males (PYTM) grown in 2008 at the Hermitage Research Station in Warwick Queensland • The trial design was a resolvable p-rep design (<strong>Cullis</strong> et al. 2006) involving 791 F 1 hybrids • The number of plots sown for each type of F 1 hybrid is presented below. Test lines (the lines of main interest) were either sown in 1 or 2 plots. Plots Test:F 1 Check:F 1 Commercial:F 1 Total:F 1 1 512 0 0 512 2 271 0 2 273 3 0 0 2 2 4 0 2 2 4 Total 783 2 6 791 VSN Applied Statistics Conference 2011 Modelling variance structures of multi-term effects
Page 1 and 2: Modelling variance structures of mu
Page 3 and 4: Linear mixed model The model Let y
Page 5 and 6: R-structures General Framework •
Page 7 and 8: Separability Direct products in R-s
Page 9 and 10: Separability Direct products in G-s
Page 11 and 12: Syntax for multi-term variance mode
Page 13 and 14: Multi-site toy example Recall: mult
Page 15 and 16: Salinity tolerance in bread wheat A
Page 17 and 18: Salinity tolerance in bread wheat P
Page 19 and 20: Salinity tolerance in bread wheat M
Page 21 and 22: Salinity tolerance in bread wheat M
Page 23: Competition modelling in sorghum pl
Page 27 and 28: Competition modelling in sorghum pl
Page 37 and 38: Partial compositing example from Sm

Brian Cullis

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