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An Empirical Model for Pollen-Mediated Gene Flow in Wheat

^a Monsanto Company, 800 North Lindbergh Blvd., St. Louis, MO 63167
^b Monsanto Canada, Winnipeg, Manitoba
^c Dep. of Plant Sciences, Univ. of Saskatchewan, 51 Campus Dr., Saskatoon, SK S7N 5A8, Canada

View larger version (16K): [in a new window]   Fig. 1. Average (across eight directions) and maximum intra-specific PMGF between two spring bread wheat varieties (from a blue aleurone source to CDC Teal as the receptor) measured over two years at Saskatoon, SK (Canada).

View larger version (15K): [in a new window]   Fig. 2. Average (across eight directions) and maximum inter-specific PMGF from a blue aleurone spring bread wheat source to a spring durum wheat (AC Navigator) as the receptor, measured over two years at Saskatoon, SK (Canada).

View larger version (23K): [in a new window]   Fig. 3. Comparison of the General Wheat Model to all available individual PMGF observations in the referenced field studies, showing its conservative ("high-end") nature. Jittering (see text) around the PMGF detection limit of each study has been used to display all individual sample points on the plot. The model appears as a curve due to the use of a logarithmic scale for the x axis.

View larger version (12K): [in a new window]   Fig. 4. Use of the General Wheat Model to study the effect of the size of the pollinator source. The model appears as a curve due to the use of the linear scale for the x axis.

View larger version (29K): [in a new window]   Fig. 5. Use of the General Wheat Model to demonstrate the impact of harvest-blending on PMGF.

View larger version (20K): [in a new window]   Fig. 6. Use of the General Wheat Model to study the influence of buffer distance on PMGF.

View larger version (34K): [in a new window]   Fig. 7. Use of the General Wheat Model to study the influence of receptor field width for a variety of buffer distances.