Gynodioecy inSaxifraga granulata L. (Saxifragaceae) |
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| Authors: | Mr. D. P. Stevens A. J. Richards |
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| Affiliation: | (1) Department of Genetics, University College of Swansea, Singleton Park, SA2 8PP Swansea, England;(2) Department of Plant Biology, University of Newcastle upon Tyne, Newcastle upon Tyne, NE1 7RU England, U.K. |
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| Abstract: | The occurrence of gynodioecy in two populations in northern England of the normally hermaphroditeSaxifraga granulata is reported. Female plants have aborted stamens, and smaller petals than hermaphrodites. At Staindrop, County Durham, an estimated 23% of the flowering stems were female; at Macclesfield, Cheshire, 4% were female. The inheritance of male sterility is not simple, and probably involves at least one cytoplasmic and two nuclear genes. The secondary sexual characteristics, hermaphrodite-predominant sex ratios, and complex inheritance of male sterility, are typical of gynodioecious populations. |
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| Keywords: | Angiosperms Saxifragaceae Saxifraga granulata L. — Gynodioecy floral biology sex ratios inheritance of male sterility |
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