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Pollen-Mediated Gene Flow from Blue Aleurone Wheat to Other Wheat Cultivars

^a Dep. of Bioagricultural Sciences and Pest Management, Colorado State Univ., Fort Collins, CO 80523
^b Dep. of Crop and Soil Science, Oregon State Univ., Corvallis, OR 97331-3002
^c Dep. of Plant Soil and Entomological Sciences, Univ. of Idaho, Moscow, ID 83844-2339

View larger version (40K): [in a new window]   Fig. 1. Outcrossing among winter wheat cultivars in 2000–2003 gene flow experiments averaged over two wheat cultivars at each distance. Experiments were located near (A) Athena, OR, and (B) Clyde, WA, in 2000–2001, (C) Moscow, ID, in 2001–2002, and (D) Moscow and (E) Lewiston, ID, in 2002–2003. Column height in each figure represents the percentage of hybrid seed out of the total number of seeds in a sample at each distance from the pollen source. A polar plot in the center of each figure indicates the percentage of wind coming from each of 16 vectors during the pollination period except at Moscow, ID, in 2002 due to an equipment failure.

View larger version (18K): [in a new window]   Fig. 2. Mean outcrossing and estimated regression curves from blue aleurone wheat to ‘Brundage 96’ and ‘Madsen’ winter wheat near (A) Athena, OR, in 2000–2001, (B) Clyde, WA, in 2000–2001, and (C) Moscow, ID, in 2000–2003. Data are an average of six downwind rays and two cultivars at each sample distance (12 samples), many of which had 0% outcrossing.

View larger version (23K): [in a new window]   Fig. 3. Semivariance plots of spatial variability at Athena, OR, Clyde, WA, and Moscow, ID, in winter wheat gene flow experiments. Data are an aggregate of six downwind rays and two cultivars at each sample distance (12 samples) many of which had no outcrossing. Lag distance is the distance between samples expressed as a proportion of the length of the ray (46.3 m).