Summary
Using a marker gene controlling capitulum type, 30 lines derived from each of a dune and a garden population of Senecio vulgaris L. were tested for their tendency to outcross. Compared with previous estimates of outbreeding in the species a relatively high degree of outcrossing was found in both experimental populations (an overall average of 22ยท4 per cent). It was shown that the dune population had a slightly greater mean outcrossing frequency than the garden population but, more importantly, had significantly more heritable variation (between lines) for this trait. In discussion, some reasons are advanced to account for the unexpectedly high level of outcrossing in both populations. It is suggested that the presence of significant genetic variation for outcrossing within the dune population may provide for adaptive flexibility in the native dune habitat where there is much spatial and temporal variation of the environment.
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Abbott, R J. 1976a. Variation within Common Groundsel, Senecio vulgaris L.I. Genetic response to spatial variations of the environment. New Phytol, 76, 153โ164.
Abbott, R J. 1976b. Variation within Common Groundsel, Senecio vulgaris L.II. Local differences within cliff populations on Puffin Island. New Phytol, 76, 165โ172.
Antonovics, J. 1968. Evolution in closely adjacent plant populations. V. Evolution of self-fertility. Heredity, 23, 219โ238.
Breese, E L. 1959. Selection for differing of out-breeding in Nicotiana rustica. Ann Bot NS. 23, 331โ334.
Craford-Sidebotham, T J. 1970. Differential susceptibility of species of slugs to metal-dehyde bran and to methiocarb baits. Oecologia (Berl), 5, 303โ324.
Darlington, C D, and Mather, K. 1949. The Elements of Genetics. George Allen and Unwin Ltd., London.
Drayner, J K. 1959. Self-and cross-fertility in field beans. (Vicia Faba L.). J Agri Sci, 53, 387โ403.
Fryxell, P A. 1957. Modes of reproduction in higher plants. Bot Rev, 23, 135โ233.
Gibbs, P E, Milne, C, and Vargas-Carrillo, M. 1975. Correlations between the breeding system and recombination index in five species of Senecio. New Phytol, 75, 619โ626.
Harding, F, and Tucker, C L. 1964. Quantitative studies on mating systems. 1. Evidence for the non-randomness of outcrossing in Phaseolus Iunatus. Heredity, 19, 369โ381.
Harland, S C. 1954. The genus Senecio as a subject for cytogenetical investigations. Proc Bot Soc Brit Is, 1, 256.
Haskell, G. 1953. Adaptation and the breeding system in Groundsel. Genetica, 26, 468โ484.
Heslop-Harrison, J. 1966. Reflections on the role of environmentally governed reproductive versatility in the adaptation of plant populations. Trans Bot Soc Edin, 40, 159โ168.
Horovitz, A, and Harding, J. 1972. The concept of male outcrossing in hermaphrodite higher plants. Heredity, 29, 223โ236.
Hull, P. 1974a. Self-fertilisation and the distribution of the radiate form of Senecio-vulgaris L. in Central Scotland. Watsonia, 10, 69โ75.
Hull, P. 1974b. Differences in esterase distribution detected by electrophoresis as evidence of continuing interspecific hybridisation in the genus Senecio. Ann Bot NS, 38, 697โ700.
Hull, P. 1975. Selection and hybridisation as possible causes of changes in the frequency of alleles controlling capitulum-type in Senecio vulgaris L. Watsonia, 10, 395โ402.
Imam, A G, and Allard, R W. 1965. Population studies in predominately self-pollinated species. VI. Genetic variability between and within natural populations of wild oats, Avena fatua L., from differing habitats in California. Genetics, 51, 49โ62.
Jain, S K, Marshall, D R, and Wu, K. 1970. Genetic variability in natural populations of softchess (Bromus mollis L.). Evolution, 24, 649โ659.
Kahler, A L, Clegg, M T, and Allard, R W. 1975. Evolutionary changes in the mating system of an experimental population of barley. Proc natn Acad Sci USA, 72, 943โ946.
Levin, D A, and Kerster, H W. 1974. Gene flow in seed plants. Evol Biol, 7, 139โ220.
Mather, K, and Jinks, J K. 1971. Biometrical Genetics, 2nd Ed. Chapman and Hall, London.
Righards, A J. 1975. The inheritance and behaviour of the rayed gene complex in Senecio vulgaris. Heredity, 34, 95โ104.
Stebbins, G L. 1957. Self-fertilisation and population variability in the higher plants. Am Nat, 91, 337โ354.
Trow, A H. 1912. On the inheritance of certain characters in the common groundsel, Senecio vulgaris L., and its segregates. J Genet, 2, 239โ276.
Trow, A H. 1916a. On the number of nodes and their distribution along the main axis of S. vulgaris and its segregates. J Genet, 2, 1โ64.
Trow, A H. 1916b. On โAlbinismโ in groundsel. J Genet, 6, 65โ74.
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Campbell, J., Abbott, R. Variability of outcrossing frequency in Senecio vulgaris L.. Heredity 36, 267โ274 (1976). https://doi.org/10.1038/hdy.1976.31
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DOI: https://doi.org/10.1038/hdy.1976.31
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