Los constreñimientos del desarrollo y su papel causal en la evolución
DOI:
https://doi.org/10.24310/Contrastescontrastes.v0i0.1166Abstract
RESUMEN
En este artículo defiendo la necesidad de reformular los conceptos de constreñimiento del desarrollo y variación a la luz de trabajos empíricos y teóricos recientes. Argumento que la noción de variación refiere a esquemas establecidos en otras épocas y que deben ser reconsiderados siguiendo los aportes de la biología del desarrollo. La variación no sería irrestricta sino restringida y condicionada. Esta reforma del concepto de variación coincide con una reforma del concepto de constreñimiento: los constreñimientos son un factor causal positivo en la evolución, en contraposición a como son usualmente entendidos en la biología.
PALABRAS CLAVE
CONSTREÑIMIENTOS, VARIACIÓN, GENES HOX, MORFOGÉNESIS, EVODEVO
ABSTRACT
In this paper I propose a revision of the concepts of developmental constraints and variation, in the light of recent empirical and theoretical works. I argue that the concept of variation evokes schemes established in other times that need to be reconsidered due to the contributions of developmental biology; variation is not unrestricted but biased. This conceptual reform of variation goes hand in hand with a reformulation of the concept of developmental constraint: constraints are a positive causal factor in evolution, in contrast with the way they are usually understood in biology.
KEYWORDS
CONSTRAINTS, VARIATION, HOX GENES, MORPHOGENETICS, EVODEVO
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