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| Web URL(s): | http://www.jstor.org/stable/2429220?seq=1#page_scan_tab_contents
Last checked: 12/17/2015
Access conditions: Item is within a limited-access website |
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| Publication Type:
| Refereed |
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| Author(s): | Bradshaw, A. D. |
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| Author Affiliation: | Department of Agricultural Botany, University College of North Wales, Bangor, Caerns, United Kingdom |
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| Title: | Population differentiation in Agrostis tenuis Sibth I. Morphological differentiation |
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| Article Series: | Population differentiation in Agrostis tenuis Sibth |
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| Source: | New Phytologist. Vol. 58, No. 2, October 1959, p. 208-227. |
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| Publishing Information: | Oxford, England: Cambridge University Press. |
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| # of Pages: | 20 |
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| Keywords: | TIC Keywords: Agrostis tenuis; Tillers (vegetative); Seeds; Environmental factors; Distribution; Natural selection; Evolution; Population dynamics; Differentiation; Outcrossing
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| Abstract/Contents: | "In order to investigate the pattern of population differentiation in Agrostis tenuis, sixty tillers were collected form each of thirty-three areas mainly in central Wales. These were grown under garden conditions in Aberystwyth. In a subsequent experiment five of these areas were sampled again by tillers, and at the same time sampled by seed. These samples were grown under garden conditions in Bangor. Numerous differences between these population samples were recorded. The main conclusions are as follows: (i) The environment is the dominating factor in determining population differentiation. (ii) Although the distribution is continuous, distances of about 50 m or less are sufficient to effectively isolate populations from one another. (iii) Thus the species is able to evolve under the influence of natural selection in response to very local variations in environment. (iv) Since the environment is a graded patchwork of different conditions, the pattern of differentiation is similar. (v) It is, therefore, not possible to classify effectively such intraspecific variation. (vi) It is likely that this situation is to be found in most other outbreeding continuously distributed plant species occupying a wide range of habitats." |
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| Language: | English |
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| References: | 38 |
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| See Also: | See also Part 2, "Population differentiation in Agrostis tenuis Sibth. II. The incidence and signficance of infection by Epichloe typhina" New Phytologist, 58(3) December 1959, p. 310-325 R=84367 R=84367
See also Part 3, "Population differentiation in Agrostis tenuis Sibth. III. Population in varied environments" New Phytologist, 59(1) April 1960, p. 92-103 R=116115 R=116115 |
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| Note: | Summary as abstract
Includes maps, "Aberystwyth region with sampling sites", p. 212, "Isopytes of the Aberystwyth region", p. 213
Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Bradshaw, A. D. 1959. Population differentiation in Agrostis tenuis Sibth I. Morphological differentiation. New Phytol. 58(2):p. 208-227. |
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| Web URL(s):
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Last checked: 12/17/2015
Access conditions: Item is within a limited-access website |
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MSU catalog number: QK 1 .N38 |
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