2024-03-28T10:07:52Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/595712012-11-22T23:00:00Zcom_10261_57com_10261_8col_10261_310
2012-11-06T12:33:54Z
urn:hdl:10261/59571
Adaptive evolution of reproductive and vegetative traits driven by breeding systems
Verdú, Miguel
Gleiser, G.
Ministerio de Educación y Ciencia (España)
Ministerio de Ciencia y Tecnología (España)
Acer
Adaptive evolution
Correlated evolution
Inflorescence size
Leaf size
Mating competition
9 páginas, 3 figuras, 2 tablas.
The evolution of inflorescence size, a key trait in reproductive success, was studied in the genus Acer under a perspective of adaptive evolution. Breeding systems,hypothesized to indicate different levels of mating competition, were considered as the selective scenarios defining different optima of inflorescence size. Larger inflorescences, which increase male fitness by generating larger floral displays, were hypothesized to be selected under scenarios with higher competition with unisexuals. An identical approach was used to test if the same selective regimes could be driving the evolution of leaf size, a vegetative trait that was found to be correlated with inflorescence size.
A Brownian motion model of inflorescence/leaf-size evolution (which cannot distinguish between changes caused by pure drift processes and changes caused by natural selection in rapidly and randomly changing environments) was compared with several adaptive Ornstein-Uhlenbeck (OU) models, which can quantify the effects of both stochasticity and natural selection.
The best-fitting model for inflorescence/leaf-size evolution was an OU model with three optima that increased with the level of mating competition.
Both traits evolved under the same selective regimes and in the same direction, confirming a pattern of correlated evolution. These results show that a selective regime hypothetically related to the evolution of a reproductive trait can also explain the evolution of a vegetative trait.
2012-11-06T12:33:54Z
2012-11-06T12:33:54Z
2006-02
artículo
New Phytologist 169(2): 409-417 (2006)
0028-646X
http://hdl.handle.net/10261/59571
10.1111/j.1469-8137.2005.01586.x
1469-8137
http://dx.doi.org/10.13039/501100006280
eng
http://dx.doi.org/10.1111/j.1469-8137.2005.01586.x
closedAccess
Wiley-Blackwell