Summary
Natural populations of Papaver dubium have a high frequency of homozygotes at polymorphic loci. A population was investigated with a view to ascertaining whether this homozygosity is due, in part, to assortative mating for flowering time. Successive flowers on a given plant tended to appear throughout the flowering season, the average interval between successive flowers being very much larger for plants with few than for plants with many flowers. As a result in outcrosses the correlation between mates for flowering time was very low. The same is probably true for many natural populations, since the flowering time of plants raised from seed obtained from six natural populations depended very little on when in the season the seed was collected.
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References
Arthur, A E. Gale, J S, and Lawrence, M J. 1973. Variation in wild populations of Papaver dubium. VII. Germination time. Heredity, 30, 189–197.
Arthur, A E. Rana, M S. Gale, J S. Humphreys, M O, and Lawrence, M J. 1973. Variation in wild populations of Papaver dubium. VI. Dominance relationships for genes controlling metrical characters. Heredity, 30, 177–187.
Humphreys, M O, and Gale, J S. 1974. Variation in wild populations of Papaver dubium. VIII. The mating system. Heredity, in press.
Lawrence, M J. 1965. Variation in wild populations of Papaver dubium. I. Variation within populations; diallel crosses. Heredity, 20, 183–204.
Salisbury, E J. 1942. The Reproductive Capacity of Plants. Bell and Sons, London.
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Gale, J., Rana, M. & Lawrence, M. Variation in wild populations of Papaver dubium. Heredity 32, 389–396 (1974). https://doi.org/10.1038/hdy.1974.46
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DOI: https://doi.org/10.1038/hdy.1974.46
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Variation in wild populations of Papaver dubium
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