Speciation via floral heterochrony and presumed mycorrhizal host switching of endemic Butterfly-orchids on the Azorean archipelago June 2014 American Journal of Botany 101(6)
Heterochrony is one process that may cause variation in the phenotype of organisms (Gould 1977, McKinney & McNamara 1991). The term heterochrony was first used by Ernst Haeckel (1875) to refer to temporal shifts in appearance of different organs during embryonic development within the same organism. In other words, it was the sequences of the
It is a key concept synthesizing development into ecology and evolution to explore the mechanisms of how developmental processes impact on phenotypic novelties. Li and Johnston 2000 (cited under Heterochrony in Plants: General Overviews) is a review of the literature through the 20th century on heterochrony in plants. Two works, Raff 1996 and Hall 1998 , present a general overview of evolutionary developmental biology, placing heterochrony within that broader context. Lethaia, 9: 245-259. HALLAM A. 1978 - How rare is phyletic gradualism?
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As a consequence, heterochrony may be the most significant Conclusions: From an evo-devo perspective, the evolution of clades with high diversity and/or disparity can be addressed from three main perspectives: (1) evolvability, in terms of release from previous constraints and of the presence of genetic or developmental conditions favouring multiple parallel occurrences of a given evolutionary transition and its reversal; (2) phenotypic plasticity as a facilitator of speciation; and (3) modularity, heterochrony and a coupling between the complexity 2021-03-12 · Speciation via floral heterochrony and presumed mycorrhizal host switching of endemic butterfly orchids on the Azorean archipelago species and speciation, led Vrba (1980) to pro pose that physical change is required for most speciation. Paterson (1978, 1982, 1985) argued that change in the fertilization system, the crit ical evolutionary change in sexual speciation, is most likely to occur in small, isolated pop ulations that are under selection pressure Heterochrony and speciation Variation in inherited develop- mental trajectories provides the raw material upon which natural selection may actl(. Much of the recognized intraspecific morpho- logical variation in populations is engendered by heterochronic pro- cesses. These processes act upon Phenotypic plasticity and heterochrony in Cichlasoma managuense (Pisces, Cichlidae) and their implications for speciation in cichlid fishes.
• Premise of the study: Most orchid species native to the Macaronesian islands reflect immigration from western Europe or North Africa followed by anagenesis. The only putative exception is the butterfly orchids (Platanthera) of the Azores, where three species apparently reflect at least one cladogenetic speciation event. This multidisciplinary study explores the origin, speciation
2003), but this perspective deserves closer attention HETEROCHRONY, MATERNAL EFFECTS, AND PHENOTYPIC VARIATION AMONG SYMPATRIC PUPFISHES HETEROCHRONY, MATERNAL EFFECTS, AND PHENOTYPIC VARIATION AMONG SYMPATRIC PUPFISHES Holtmeier, Cami L. 2001-02-01 00:00:00 Department of Ecology and Evolutionary Biology, Corson Hall, Cornell University, Ithaca, New York 14853-2701 Abstract. Variation … Heterochrony is evolutionary change in the timing of expression of a phenotype trait, that transfers expression of the trait from one life stage or behavioral or physiological phase to another—”the shifting of characters from one part of an ontogeny to another” (Valentine, 1977b, p. 260) or simply “the displacement of characters in time” (Gould, 1977, p. 225).
Heterochrony: beyond words - Volume 25 Issue 2 Skip to main content Accessibility help We use cookies to distinguish you from other users and to provide you with a better experience on our websites.
Jacques Van Alphen. Marcel Haesler. ole seehausen. Heterochrony: beyond words - Volume 25 Issue 2 Skip to main content Accessibility help We use cookies to distinguish you from other users and to provide you with a better experience on our websites. Heterochrony, broadly defined, refers to evolutionary change in the rate or timing of development. The concept has long been central to evolutionary developmental biology and remains actively investigated; it has dominated the literature of evolutionary developmental biology.
The term heterochrony was first used by Ernst Haeckel (1875) to refer to temporal shifts in appearance of different organs during embryonic development within the same organism. In other words, it was the sequences of the
with predictions from models of heterochrony by paedomorphosis and speciation by a foun- der event.
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It emphasizes absolute rather than relativistic mechanisms, and concentrates on adaptive processes within population isolates rather than competitive exclusion or competition.
When heterochrony produces polymorphisms, it offers the possibility to test hypotheses that could explain its success across environments. Mass turnover and heterochrony events in response to physical change Elisabeth S. Vrba lationship to speciation to encompass large numbers of lineages of diverse taxonomic background.
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Heritability and heterochrony of polychromatism in a Lake Victoria Cichlid fish: stepping stones for speciation?
Heritability and heterochrony of polychromatism in a Lake Victoria cichlid fish: stepping stones for speciation? Journal of experimental zoology. Part B - molecular and developmental evolution, 306B(2), pp.
speciation through ontogenetic reorganization • heterotopy: spatial reorganization of ontogeny, change in directions of growth and development – e.g. migration patterns of NCC – e.g. nr. and arrangement of dental cusps – e.g. spatial arrangement of depository and resorptive bone growth fields
It is a key concept synthesizing development into ecology and evolution to explore the mechanisms of how developmental processes impact on phenotypic novelties. Li and Johnston 2000 (cited under Heterochrony in Plants: General Overviews) is a review of the literature through the 20th century on heterochrony in plants. Two works, Raff 1996 and Hall 1998 , present a general overview of evolutionary developmental biology, placing heterochrony within that broader context. Lethaia, 9: 245-259. HALLAM A. 1978 - How rare is phyletic gradualism? Evidence from Jurassic bivalves. Paleobiology, 4: 16-25.
Speciation via floral heterochrony and presumed mycorrhizal host switching of endemic Butterfly-orchids on the Azorean archipelago June 2014 American Journal of Botany 101(6) PHENOTYPIC PLASTICITY AND HETEROCHRONY IN CICHLASOMA MANAGUENSE (PISCES, CICHLIDAE) AND THEIR IMPLICAnONS FOR SPECIAnON IN CICHLID FISHES AXEL MEYER Museum ofVertebrate Zoology and Department ofZoology, University ofCalifornia, Berkeley, CA 94720 Abstract.- Cichlid fishes in African rift lakes have undergone rapidspeciation, resulting in "species Heritability and heterochrony of polychromatism in a Lake Victoria cichlid fish: stepping stones for speciation? Journal of experimental zoology. Part B - molecular and developmental evolution, 306B(2), pp.