Molecular Heterochrony in the Pattern of Fibronectin Expression During Gastrulation in Amphibians

Collazo, Andrés

doi:10.2307/2410525

Cited by 8 publications

(3 citation statements)

References 28 publications

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“…However, Raff (15) has pointed out that heterochrony can be found in earlier as well as in later stages of development. Indeed, changes in developmental timing in the early stages of ontogeny has been described in many studies (6,(36)(37)(38)(39). Furthermore, Richardson et al (40) argue that previous notions of phylotypic stages are based on an incomplete analysis of comparative data, and they suggest that there are no particularly conserved stages of development.…”

Section: Discussionmentioning

confidence: 99%

Molecular heterochrony in the early development of Drosophila

Kim

Kerr

Min

2000

Proc. Natl. Acad. Sci. U.S.A.

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Section: Discussionmentioning

confidence: 99%

Molecular heterochrony in the early development of Drosophila

Kim

Kerr

Min

2000

Proc. Natl. Acad. Sci. U.S.A.

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“…Such events include the initial differentiation and patterning of the major elements of the body, appearance of segmental and regional identity, patterns of regulatory gene expression, induction and signaling cascades, cell and tissue specification and differentiation, or the differentiation of skeletal elements and organ systems. Because these events are not functions of size and shape parameters, they are excluded from the analyses of growth heterochrony, but are increasingly the kinds of events examined in comparative studies of development (e.g., Hall, 1984;Langille and Hall, 1989;Wray and McClay, 1989;Jeffery and Swalla, 1992;Swalla et al, 1993Swalla et al, , 1994Collazo, 1994;Richardson, 1995;Smith MM, 1995;Wray, 1995;Cubbage and Mabee, 1996;Slack and Ruvkun, 1997;Velhagen, 1997). These are precisely the kinds of events that must be understood in order to understand how changing genetic and morphogenetic processes produce evolutionary transitions.…”

Section: Heterochrony Revisitedmentioning

confidence: 99%

Sequence Heterochrony and the Evolution of Development

Smith

2002

Journal of Morphology

113

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One of the most persistent questions in comparative developmental biology concerns whether there are general rules by which ontogeny and phylogeny are related. Answering this question requires conceptual and analytic approaches that allow biologists to examine a wide range of developmental events in well-structured phylogenetic contexts. For evolutionary biologists, one of the most dominant approaches to comparative developmental biology has centered around the concept of heterochrony. However, in recent years the focus of studies of heterochrony largely has been limited to one aspect, changes in size and shape. I argue that this focus has restricted the kinds of questions that have been asked about the patterns of developmental change in phylogeny, which has narrowed our ability to address some of the most fundamental questions about development and evolution. Here I contrast the approaches of growth heterochrony with a broader view of heterochrony that concentrates on changes in developmental sequence. I discuss a general approach to sequence heterochrony and summarize newly emerging methods to analyze a variety of kinds of developmental change in explicit phylogenetic contexts. Finally, I summarize a series of studies on the evolution of development in mammals that use these new approaches.

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“…These are increasingly the kinds of events examined in studies of evolution and development (e.g. Collazo, 1994;Cubbage & Mabee, 1996;Hall, 1984a;Jeffery & Swalla, 1992;Langille & Hall, 1989;Richardson, 1995;Slack & Ruvkun, 1997;Smith, 1995;Swalla et aE., 1994;Velhagen, 1997;Wray, 1995;Wray & McClay, 1989). Changes in the relative timing of such events are likely to be critical in producing evolutionary change.…”

Section: Peramorphosis Recapitulationmentioning

confidence: 99%

Heterochrony revisited: the evolution of developmental sequences

Smith

2001

Biological Journal of the Linnean Society

136

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The concept of heterochrony is a persistent component of discussions about the way that evolution and development interact. Since the late 1970s heterochrony has been defined largely as developmental changes in the relationship of size and shape. This approach t o heterochrony, here termed growth heterochrony, is limited in the way it can analyse change in the relative timing of developmental events in a number of respects. In particular, analytical techniques do not readily allow the study of changes in developmental events not characterized by size and shape parameters, or of many kinds of events in many taxa. I discuss here an alternative approach to heterochrony, termed sequence heterochrony, in which a developmental trajectory is conceptualized as a series of discrete events. Heterochrony is demonstrated when the sequence position of an event changes relative to other events in that sequence. I summarize several analytical techniques that allow the investigation of sequence heterochrony in phylogenetic contexts and also quantitatively. Finally, several examples of how this approach may be used to test hypotheses on the way development evolves are summarized. 0 2001 The Linnean Society of London ADDITIONAL KEY WORDS: developmentcraniofacialmammalmarsupial. Blackstone NW. 198713. Size and time. Systematic Zoology Clark CT, Smith KK. 1993. Cranial osteogenesis in Monodelphis domestica (Didelphidae) and Mucmpus eugenii (Macropodidae). Journal of Morphology 215: 119-149. Cockburn A. 1989. Adaptive patterns in marsupial reproduction. Trends in Ecology and Evolution 4 12G130. logy 36: 76-78. 36.211-215.

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Molecular Heterochrony in the Pattern of Fibronectin Expression During Gastrulation in Amphibians

Cited by 8 publications

References 28 publications

Molecular heterochrony in the early development of Drosophila

Molecular heterochrony in the early development of Drosophila

Sequence Heterochrony and the Evolution of Development

Heterochrony revisited: the evolution of developmental sequences

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