Ecological consequences of hybridization between a wild species (Echinacea purpurea) and related cultivar (E. purpurea 'White Swan')

Tami M. Van Gaal; Susan M. Galatowitsch; Mark S. Strefeler

doi:10.1016/S0304-4238(98)00119-8

Ecological consequences of hybridization between a wild species (Echinacea purpurea) and related cultivar (E. purpurea 'White Swan')

Tami M. Van Gaal, Susan M. Galatowitsch, Mark S. Strefeler

Fisheries, Wildlife, and Conservation Biology

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

In the first such study of its kind, we examined gene flow potential between a valued native plant and a popular cultivar. We studied outcomes of controlled hybridization between Echinacea purpurea and a conspecific cultivar, E. purpurea 'White Swan', by comparing levels of competitive ability and reproductive potential. Differences in plant performance of wild-types and F₁'s were studied at three densities (20.3, 45.7, and 182.9 plants/m²) using a field competition experiment. Wild-types were slightly larger but F₁s had higher reproductive output. These differences can be attributed to floricultural breeding of the cultivar parent. Based on the results of this research, if the initial hybridization between the wild-type and cultivar were to occur, it is anticipated that the resulting F₁ generation would survive and reproduce, creating the potential for continued gene flow. This methodology has potential for use in risk assessment of plant introductions, including transgenic crops.

Original language	English (US)
Pages (from-to)	73-88
Number of pages	16
Journal	Scientia Horticulturae
Volume	76
Issue number	1-2
DOIs	https://doi.org/10.1016/S0304-4238(98)00119-8
State	Published - Jul 17 1998

Bibliographical note

Funding Information:
We thank N. Anderson, J. Luby, and R. Mack for their review and suggestions that improved early versions of the manuscript. This research was supported in part by a Grant-in-Aid of Research from Sigma Xi, The Scientific Research Society and by a graduate fellowship from the University of Minnesota Center for Community Genetics. This is Minnesota Agricultural Experiment Station Publication, 981210012.

Keywords

Competition
Echinacea purpurea
Fitness
Gene flow
Hybridization
Minnesota
Prairie
Purple coneflower
Risk assessment

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Ecological consequences of hybridization between a wild species (Echinacea purpurea) and related cultivar (E. purpurea 'White Swan')

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