Journal article
Repeated evolution of net venation and fleshy fruits among monocots in shaded habitats confirms a priori predictions: evidence from an ndhF phylogeny
Proceedings of the Royal Society. B, Biological sciences, Vol.272(1571), pp.1481-1490
07/22/2005
Handle:
https://hdl.handle.net/2376/101372
PMCID: PMC1559828
PMID: 16011923
Abstract
We present a well-resolved, highly inclusive phylogeny for monocots, based on
ndhF
sequence variation, and use it to test
a priori
hypotheses that net venation and vertebrate-dispersed fleshy fruits should undergo concerted convergence, representing independent but often concurrent adaptations to shaded conditions. Our data demonstrate that net venation arose at least 26 times and was lost eight times over the past 90 million years; fleshy fruits arose at least 21 times and disappeared 11 times. Both traits show a highly significant pattern of concerted convergence (
p
<10
−9
), arising 16 times and disappearing four times in tandem. This phenomenon appears driven by even stronger tendencies for both traits to evolve in shade and be lost in open habitats (
p
<10
−13
–10
−29
). These patterns are among the strongest ever demonstrated for evolutionary convergence in individual traits and the predictability of evolution, and the strongest evidence yet uncovered for concerted convergence. The rate of adaptive shifts per taxon has declined exponentially over the past 90 million years, as expected when large-scale radiations fill adaptive zones.
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Details
- Title
- Repeated evolution of net venation and fleshy fruits among monocots in shaded habitats confirms a priori predictions: evidence from an ndhF phylogeny
- Creators
- Thomas J Givnish - Department of BotanyJ. Chris Pires - Department of Agronomy, University of WisconsinSean W Graham - UBC Botanical Garden, Centre for Plant Research, and Department of Botany, University of British ColumbiaMarc A McPherson - UBC Botanical Garden, Centre for Plant Research, and Department of Botany, University of British ColumbiaLinda M Prince - Rancho Santa Ana Botanic GardenThomas B Patterson - Department of BotanyHardeep S Rai - UBC Botanical Garden, Centre for Plant Research, and Department of Botany, University of British ColumbiaEric H Roalson - School of Biological Sciences, Washington State UniversityTimothy M Evans - Department of Biology, Hope CollegeWilliam J Hahn - Georgetown CollegeKendra C Millam - Department of BotanyAlan W Meerow - USDA-ARS-SHRS, National Germplasm Repository and Fairchild Tropical GardenMia Molvray - Department of Biology, Moorpark CollegePaul J Kores - Department of Biology, Moorpark CollegeHeath E O'Brien - UBC Botanical Garden, Centre for Plant Research, and Department of Botany, University of British ColumbiaJocelyn C Hall - Department of BotanyW. John Kress - National Museum of Natural History, Department of Botany, Smithsonian InstitutionKenneth J Sytsma - Department of Botany
- Publication Details
- Proceedings of the Royal Society. B, Biological sciences, Vol.272(1571), pp.1481-1490
- Academic Unit
- Biological Sciences, School of
- Publisher
- The Royal Society; London
- Identifiers
- 99900546514601842
- Language
- English
- Resource Type
- Journal article