Translocation heterozygosity in Phlox drummondii.
نویسندگان
چکیده
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 کاملPollinator-mediated selection on flower color allele drives reinforcement.
Reinforcement is the process by which reduced hybrid fitness generates selection favoring the evolution of stronger prezygotic reproductive barriers between emerging species. Using common-garden field experiments, we quantified the strength of reinforcing selection in nature by demonstrating strong selection favoring an allele conferring increased pigment intensity in the plant Phlox drummondii...
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ژورنال
عنوان ژورنال: CYTOLOGIA
سال: 1981
ISSN: 0011-4545,1348-7019
DOI: 10.1508/cytologia.46.301