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- Alexander, H.M.; Cummings, C.L.; Kahn, L.; Snow, A.A.
- American journal of botany 2001 v.88 no.4 pp. 623-627
- Helianthus annuus, etc ; wild plants; seed predation; pollen; hybrids; color; inflorescences; gene flow; Show all 8 Subjects
- ... The movement of pollen between crop and wild sunflowers (both Helianthus annuus) has led to concerns about the possible introduction of crop transgenes into wild populations. The persistence of crop traits in wild populations will depend in part on the relative fitness of crop-wild hybrid vs. wild plants. Using seeds from two large experimental field plots, we found that seeds produced by crop-wil ...
- Schwarzbach, A.E.; Donovan, L.A.; Rieseberg, L.H.
- American journal of botany 2001 v.88 no.2 pp. 270-277
- Helianthus annuus, etc ; Helianthus petiolaris; interspecific hybridization; hybrids; transgressive segregation; plant ecology; evolution; plant morphology; adaptation; genetic variation; water use efficiency; phenotype; mutation; Utah; Show all 14 Subjects
- ... Diploid hybrid lineages often are ecologically distinct from their parental species. However, it is unclear whether this niche divergence is typically achieved via hybrid intermediacy, a mixture of parental traits, and/or the evolution of extreme (transgressive) morphological and ecophysiological features. Here we compare an extensively studied hybrid sunflower species, Helianthus anomalus, with i ...