You are not currently logged in.
Access JSTOR through your library or other institution:
If You Use a Screen ReaderThis content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Inbreeding Depression in Partially Self-Fertilizing Phlox
Donald A. Levin
Vol. 43, No. 7 (Nov., 1989), pp. 1417-1423
Published by: Society for the Study of Evolution
Stable URL: http://www.jstor.org/stable/2409457
Page Count: 7
You can always find the topics here!Topics: Inbreeding depression, Evolution, Plants, Abortion, Breeding, Pollen, Induced abortion, Species, Self fertilization, Inbreeding
Were these topics helpful?See somethings inaccurate? Let us know!
Select the topics that are inaccurate.
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available
Inbreeding depression was measured in terms of the relative survivorship of self versus cross seed in 14 Phlox drummondii cultivars and 10 populations of P cuspidata. The cultivars are predominantly outcrossing; P. cuspidata is predominantly self-fertilizing. The relative survivorship of self versus cross seed averages 0.84 in the cultivars and 0.99 in P cuspidata. In wild P. drummondii, the average is 0.83. The mean number of lethal equivalents per zygote averages 0.69 in the cultivars and 0.05 in P cuspidata, versus 0.79 in the wild P. drummondii. There is a significant negative correlation between the amount of automatic self-seed produced by a cultivar and the number of lethal equivalents it carries (r = -0.60). Phlox cuspidata has a lower level of cross-seed abortion than P drummondii, which probably is not due to a difference in the incidence of lethal genes in their populations.
Evolution © 1989 Society for the Study of Evolution