Genotype accounts for intraspecific variation in the timing and duration of multiple, sequential life-cycle events in a willow species.

Autor: Iler AM; Chicago Botanic Garden, Negaunee Institute for Plant Conservation Science and Action, Glencoe, IL, USA.; Northwestern University, Plant Biology and Conservation, Evanston, IL, USA.; Aarhus University, Aarhus Institute of Advanced Studies, Aarhus, Denmark., CaraDonna PJ; Chicago Botanic Garden, Negaunee Institute for Plant Conservation Science and Action, Glencoe, IL, USA.; Northwestern University, Plant Biology and Conservation, Evanston, IL, USA., Richardson LK; Chicago Botanic Garden, Negaunee Institute for Plant Conservation Science and Action, Glencoe, IL, USA.; Northwestern University, Plant Biology and Conservation, Evanston, IL, USA., Wu ET; California State Polytechnic University - Humboldt, Department of Biological Sciences, Arcata, CA, USA., Fant JB; Chicago Botanic Garden, Negaunee Institute for Plant Conservation Science and Action, Glencoe, IL, USA.; Northwestern University, Plant Biology and Conservation, Evanston, IL, USA., Pfeiler KC; California State Polytechnic University - Humboldt, Department of Biological Sciences, Arcata, CA, USA.; Department of Ecology and Evolutionary Biology, University of Kansas, Lawrence, KS, USA.; Biodiversity Institute, University of Kansas, Lawrence, KS, USA., Freymiller GA; California State Polytechnic University - Humboldt, Department of Biological Sciences, Arcata, CA, USA., Godfrey KN; California State Polytechnic University - Humboldt, Department of Biological Sciences, Arcata, CA, USA., Gorman AJ; California State Polytechnic University - Humboldt, Department of Biological Sciences, Arcata, CA, USA., Wilson N; California State Polytechnic University - Humboldt, Department of Biological Sciences, Arcata, CA, USA., Whitford MD; California State Polytechnic University - Humboldt, Department of Biological Sciences, Arcata, CA, USA., Edmonds GA; California State Polytechnic University - Humboldt, Department of Biological Sciences, Arcata, CA, USA., Stratton C; California State Polytechnic University - Humboldt, Department of Biological Sciences, Arcata, CA, USA., Jules ES; California State Polytechnic University - Humboldt, Department of Biological Sciences, Arcata, CA, USA.
Jazyk: angličtina
Zdroj: American journal of botany [Am J Bot] 2023 Feb; Vol. 110 (2), pp. e16112. Date of Electronic Publication: 2023 Feb 01.
DOI: 10.1002/ajb2.16112
Abstrakt: Premise: Phenological variation among individuals within populations is common and has a variety of ecological and evolutionary consequences, including forming the basis for population-level responses to environmental change. Although the timing of life-cycle events has genetic underpinnings, whether intraspecific variation in the duration of life-cycle events reflects genetic differences among individuals is poorly understood.
Methods: We used a common garden experiment with 10 genotypes of Salix hookeriana (coastal willow) from northern California, United States to investigate the extent to which genetic variation explains intraspecific variation in the timing and duration of multiple, sequential life-cycle events: flowering, leaf budbreak, leaf expansion, fruiting, and fall leaf coloration. We used seven clones of each genotype, for a total of 70 individual trees.
Results: Genotype affected each sequential life-cycle event independently and explained on average 62% of the variation in the timing and duration of vegetative and reproductive life-cycle events. All events were significantly heritable. A single genotype tended to be "early" or "late" across life-cycle events, but for event durations, there was no consistent response within genotypes.
Conclusions: This research demonstrates that genetic variation can be a major component underlying intraspecific variation in the timing and duration of life-cycle events. It is often assumed that the environment affects durations, but we show that genetic factors also play a role. Because the timing and duration of events are independent of one another, our results suggest that the effects of environmental change on one event will not necessarily cascade to subsequent events.
(© 2022 The Authors. American Journal of Botany published by Wiley Periodicals LLC on behalf of Botanical Society of America.)
Databáze: MEDLINE
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