Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Recent Plant Speciation in Britain and Ireland: Origins, Establishment and Evolution of Four New Hybrid Species

Recent Plant Speciation in Britain and Ireland: Origins, Establishment and Evolution of Four New... Four new, sexually reproducing hybrid species have originated in the British Isles during the past 100–400 years. Two of these are allopolyploids ( Senecio cambrensis and Spartina anglica ), one is a recombinant polyploid ( Senecio eboracensis ), and the other is a diploid hybrid species ( Senecio squalidus ). We review what is known about the origins and establishment of each of these species. Material of all four species provides a valuable resource for detailed analysis of processes involved in the evolution of new species during and immediately following their origin. We also report the results of a recent study conducted on neutral molecular variation (AFLP variation) within S. cambrensis and its two parents, S. vulgaris and S. squalidus . Widespread AFLP variation was recorded in S. cambrensis with approximately 12.5% of this variation due to differences between populations and 87.5% resulting from variation within populations. This shows that genetic diversity has been rapidly generated in this species, most probably due to multiple origins, intergenomic recombination, crossing between divergent lines and possibly other factors such as increased transposon and retroelement activity. This ability to generate large amounts of genetic diversity may aid this species in adapting to new sites and increasing its range in the future. The high level of AFLP variation recorded in S. cambrensis contrasts with the relative genetic uniformity found in Spartina anglica based on AFLP surveys conducted by others. Reasons for this difference are briefly discussed. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Biology and Environment: Proceedings of the Royal Irish Academy Royal Irish Academy

Recent Plant Speciation in Britain and Ireland: Origins, Establishment and Evolution of Four New Hybrid Species

Download PDF
11 pages

Loading next page...
 
/lp/royal-irish-academy/recent-plant-speciation-in-britain-and-ireland-origins-establishment-Yk47v6wXA6

References (52)

Publisher
Royal Irish Academy
Copyright
Copyright © 2005 RIA
ISSN
0791-7945
eISSN
2009-003X
DOI
10.3318/BIOE.2005.105.3.173
Publisher site
See Article on Publisher Site

Abstract

Four new, sexually reproducing hybrid species have originated in the British Isles during the past 100–400 years. Two of these are allopolyploids ( Senecio cambrensis and Spartina anglica ), one is a recombinant polyploid ( Senecio eboracensis ), and the other is a diploid hybrid species ( Senecio squalidus ). We review what is known about the origins and establishment of each of these species. Material of all four species provides a valuable resource for detailed analysis of processes involved in the evolution of new species during and immediately following their origin. We also report the results of a recent study conducted on neutral molecular variation (AFLP variation) within S. cambrensis and its two parents, S. vulgaris and S. squalidus . Widespread AFLP variation was recorded in S. cambrensis with approximately 12.5% of this variation due to differences between populations and 87.5% resulting from variation within populations. This shows that genetic diversity has been rapidly generated in this species, most probably due to multiple origins, intergenomic recombination, crossing between divergent lines and possibly other factors such as increased transposon and retroelement activity. This ability to generate large amounts of genetic diversity may aid this species in adapting to new sites and increasing its range in the future. The high level of AFLP variation recorded in S. cambrensis contrasts with the relative genetic uniformity found in Spartina anglica based on AFLP surveys conducted by others. Reasons for this difference are briefly discussed.

Journal

Biology and Environment: Proceedings of the Royal Irish Academy – Royal Irish Academy

Published: Sep 1, 2005

There are no references for this article.