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Pollen migration in predominantly self-fertilizing plants: barley
1Department of Genetics, University of California, Davis.
The Journal of Heredity
|July 1, 1991
Summary
Barley outcrossing, typically between adjacent plants, can surprisingly occur up to 60 meters apart. This long-distance pollen movement has significant implications for maintaining genetic purity in barley research and breeding programs.
Area of Science:
- Plant genetics
- Agricultural science
- Population genetics
Background:
- Barley (Hordeum vulgare) is predominantly self-fertilizing, with outcrossing rates around 1%.
- Previous studies indicated outcrossing is rare beyond short distances (e.g., 1 meter).
Purpose of the Study:
- To investigate the potential for long-distance pollen dispersal in barley.
- To assess the impact of extended pollen migration on genetic integrity.
Main Methods:
- Field observations and genetic analysis of barley populations.
- Pollen dispersal studies in controlled and natural environments.
Main Results:
- Evidence suggests barley pollen can travel up to 60 meters.
- Outcrossing events were detected at distances significantly greater than previously reported.
Conclusions:
- Long-distance pollen dispersal in barley is more common than assumed.
- This phenomenon necessitates re-evaluation of strategies for maintaining genetic purity in pedigreed and experimental barley populations.