منابع مشابه
A Genetical Study of Flower Form and Flower Color in PHLOX DRUMMONDII.
The “Star Phloxes” .,. 191 Discussion ............................................................... 200 The funnel-shaped phloxes ................................................ 204 Genetics of flower color ...................................................... zog Factor differences involved when type with completely white flowers (A) was crossed with type having dark-eyed white-bladed flow...
متن کاملThe cost of reinforcement: selection on flower color in allopatric populations of Phlox drummondii.
Reinforcement is the process by which increased reproductive isolation between incipient species evolves due to selection against maladaptive hybrids or costly hybrid mating. Reinforcement is predicted to create a pattern of greater prezygotic reproductive isolation in regions where the two species co-occur, sympatry, than in allopatry. Although most research on reinforcement focuses on underst...
متن کاملMolecular signatures of selection on reproductive character displacement of flower color in Phlox drummondii.
Character displacement, which arises when species diverge in sympatry to decrease competition for resources or reproductive interference, has been observed in a wide variety of plants and animals. A classic example of reproductive character displacement, presumed to be caused by reinforcing selection, is flower-color variation in the native Texas wildflower Phlox drummondii. Here, we use popula...
متن کاملEnvironmental effects on pollen-pistil compatibility between Phlox cuspidata and P. drummondii (Polemoniaceae): implications for hybridization dynamics.
Postpollination mechanisms of reproductive isolation can critically influence the amount of gene flow between hybridizing species. While much evidence exists for genetically based pollen-pistil incompatibility, we show that environmental variation also influences the postpollination performance of heterospecific pollen in the annual Phlox hybrid system. Thus, the environmental segregation of sp...
متن کاملGenomic evidence of gene flow during reinforcement in Texas Phlox.
Gene flow can impede the evolution of reproductive isolating barriers between species. Reinforcement is the process by which prezygotic reproductive isolation evolves in sympatry due to selection to decrease costly hybridization. It is known that reinforcement can be prevented by too much gene flow, but we still do not know how often have prezygotic barriers evolved in the presence of gene flow...
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ژورنال
عنوان ژورنال: Heredity
سال: 1993
ISSN: 0018-067X,1365-2540
DOI: 10.1038/hdy.1993.124