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Pollen-Mediated Gene Flow in California Cotton Depends on Pollinator Activity

California Crop Improvement Association, One Shields Ave., Univ. of California, Davis, CA 95616

View larger version (27K): [in a new window]   Fig. 1. Pollen-mediated gene flow (PGF) in California with (Kearney, circles) and without (Shafter, diamonds) the addition of honeybees. Each data point represents PGF detected from 16000 seeds sampled in four directions from a source plot in two growing seasons. Solid lines represent the best fit curve for the two datasets. Broken lines represent 95% upper confidence limit.

View larger version (24K): [in a new window]   Fig. 2. Pollen-mediated gene flow (PGF) in California collected from neighboring fields separated by open space in five different locations in three years. PGF was calculated on the basis of samples (2000 seeds each) collected at the closest edge of solid-seeded commercial fields (25–34 m), 200, 400, 800, and 1625 m from herbicide-resistant (BXN or Roundup Ready) cotton. Solid line is the best-fit regression curve. Broken vertical line represents the current isolation distance for foundation seed of 400 m.