Source population characteristics affect heterosis following genetic rescue of fragmented plant populations

M. Pickup, D. Field, D. Rowell, A. Young, Proceedings of the Royal Society of London Series B Biological Sciences 280 (2013).


Journal Article | Published | English
Author
Pickup, MelindaIST Austria ; Field, DavidIST Austria ; Rowell, David; Young, Andrew
Department
Abstract
Understanding the relative importance of heterosis and outbreeding depression over multiple generations is a key question in evolutionary biology and is essential for identifying appropriate genetic sources for population and ecosystem restoration. Here we use 2455 experimental crosses between 12 population pairs of the rare perennial plant Rutidosis leptorrhynchoides (Asteraceae) to investigate the multi-generational (F1, F2, F3) fitness outcomes of inter-population hybridization. We detected no evidence of outbreeding depression, with inter-population hybrids and backcrosses showing either similar fitness or significant heterosis for fitness components across the three generations. Variation in heterosis among population pairs was best explained by characteristics of the foreign source or home population, and was greatest when the source population was large, with high genetic diversity and low inbreeding, and the home population was small and inbred. Our results indicate that the primary consideration for maximizing progeny fitness following population augmentation or restoration is the use of seed from large, genetically diverse populations.
Publishing Year
Date Published
2013-01-07
Journal Title
Proceedings of the Royal Society of London Series B Biological Sciences
Volume
280
Issue
1750
Article Number
2058
IST-REx-ID
450

Cite this

Pickup M, Field D, Rowell D, Young A. Source population characteristics affect heterosis following genetic rescue of fragmented plant populations. Proceedings of the Royal Society of London Series B Biological Sciences. 2013;280(1750). doi:10.1098/rspb.2012.2058
Pickup, M., Field, D., Rowell, D., & Young, A. (2013). Source population characteristics affect heterosis following genetic rescue of fragmented plant populations. Proceedings of the Royal Society of London Series B Biological Sciences, 280(1750). https://doi.org/10.1098/rspb.2012.2058
Pickup, Melinda, David Field, David Rowell, and Andrew Young. “Source Population Characteristics Affect Heterosis Following Genetic Rescue of Fragmented Plant Populations.” Proceedings of the Royal Society of London Series B Biological Sciences 280, no. 1750 (2013). https://doi.org/10.1098/rspb.2012.2058.
M. Pickup, D. Field, D. Rowell, and A. Young, “Source population characteristics affect heterosis following genetic rescue of fragmented plant populations,” Proceedings of the Royal Society of London Series B Biological Sciences, vol. 280, no. 1750, 2013.
Pickup M, Field D, Rowell D, Young A. 2013. Source population characteristics affect heterosis following genetic rescue of fragmented plant populations. Proceedings of the Royal Society of London Series B Biological Sciences. 280(1750), 2058.
Pickup, Melinda, et al. “Source Population Characteristics Affect Heterosis Following Genetic Rescue of Fragmented Plant Populations.” Proceedings of the Royal Society of London Series B Biological Sciences, vol. 280, no. 1750, 2058, Royal Society, The, 2013, doi:10.1098/rspb.2012.2058.
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