Genetic and spatial variation in vegetative and floral traits across a hybrid zone
Abstract
AbstractPremiseGenetic variation influences the potential for evolution to rescue populations from impacts of environmental change. Most studies of genetic variation in fitness‐related traits focus on either vegetative or floral traits, with few on floral scent. How vegetative and floral traits compare in potential for adaptive evolution is poorly understood.MethodsWe measured variation across source populations, planting sites, and genetic families for vegetative and floral traits in a hybrid zone. Seeds from families of Ipomopsis aggregata, I. tenuituba, and F1 and F2 hybrids of the two species were planted into three common gardens. Measured traits included specific leaf area (SLA), trichomes, water‐use efficiency (WUE), floral morphology, petal color, nectar, and floral volatiles.ResultsVegetative traits SLA and WUE varied greatly among planting sites, while showing weak or no genetic variation among source populations. Specific leaf area and trichomes responded plastically to snowmelt date, and SLA exhibited within‐population genetic variation. All aspects of floral morphology varied genetically among source populations, and corolla length, corolla width, and sepal width varied genetically within populations. Heritability was not detected for volatiles due to high environmental variation, although one terpene had high evolvability, and high emission of two terpenes, a class of compounds emitted more strongly from the calyx than the corolla, correlated genetically with sepal width. Environmental variation across sites was weak for floral morphology and stronger for volatiles and vegetative traits. The inheritance of three of four volatiles departed from additive.ConclusionsResults indicate stronger genetic potential for evolutionary responses to selection in floral morphology compared with scent and vegetative traits and suggest potentially adaptive plasticity in some vegetative traits.
Local Knowledge Graph (21 entities)
Related Works
Items connected by shared entities, co-authorship, citations, or semantic similarity.
Selection of floral traits by pollinators and seed predators during sequential life history stages
Data from: Genetic and spatial variation in vegetative and floral traits across a hybrid zone
Evolution of floral traits in a hermaphroditic plant: field measurements of heritabilities and genetic correlations
Clines in traits compared over two decades in a plant hybrid zone
Data for: Pollinator and habitat-mediated selection as potential contributors to ecological speciation in two closely related species
Data for: Predicting the contribution of single trait evolution to rescuing a plant population from demographic impacts of climate change
Shrubland Ecosystem Genetics And Biodiversity: Proceedings
Native Plant Revegetation Guide for Colorado
Growing Colorado Plants From Seed: State of the Art Volume III
Cited By (11 times, 8 in Knowledge Hub)
Predicting the contribution of single trait evolution to rescuing a plant population from demographic impacts of climate change
Natural selection on floral volatiles and other traits can change with snowmelt timing and summer precipitation
Effects of experimental warming on floral scent, display and rewards in two subalpine herbs
The effects of snowmelt date, soil moisture, and precipitation on nectar and floral morphology of Ipomopsis
Responses to climate change – insights and limitations from herbaceous plant model species
Pollinator and habitat-mediated selection as potential contributors to ecological speciation in two closely related species
Genetic and spatial variation in vegetative and floral traits across a hybrid zone
An analytical pipeline to support robust research on the ecology, evolution, and function of floral volatiles
References (72)
17 in Knowledge Hub, 55 external