By Quentin C.B. Cronk, Richard M. Bateman, Julie A. Hawkins
This benchmark textual content integrates the hot revolution within the molecular-developmental genetics of vegetation with mainstream evolutionary suggestion. there's expanding co-operation among strongly genomics-influenced researchers, with their powerful grab of expertise, and evolutionary morphogenetists and systematics who're extra deeply rooted in comparative biology and styles of plant evolution. This booklet discusses our expanding realizing of gene functionality and expression, in addition to sleek phylogenies integrating morphological and molecular facts to focus on particular key transitions in plant evolution so much beneficial of extensive research. additionally, it explores expanding wisdom of the actual expression of plant improvement from disciplines akin to anatomy and palaeobotany. instead of specialise in the technical features of plant genomics, this publication presents really built-in reasons of plant evolution. This best panel of individuals have succeeded in turning a tough topic into an obtainable quantity for a variety of specialist botanists and postgraduate and senior undergraduates in developmental biology, utilized molecular biology, molecular evolution, morphogenesis, organismal botany and theoretical systematics.
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Additional resources for Developmental Genetics and Plant Evolution
Phylogenetic systematics is concerned with the reconstruction of relationships among species or higher taxa. Historically, comparative morphology (level 4) has provided the data used for phylogeny reconstruction, but during the last decade DNA sequences have increasingly become the markers of choice for the reconstruction of phylogenetic relationship. The genetic differences underlying morphological divergence (level 1) have yet to be thoroughly investigated as phylogenetic markers. The advent of the 'new synthesis' between genetics, development, morphology and phylogenp can be attributed to two important new developments.
Nelson, 1978; Patterson, 1983; Humphries, 1988; Hall, 1992), but practically the fields had not been unified into a discipline with its own research strategy. Plant evolutionary developmental genetics is becoming established as a discipline, but in the foreseeable future it will of necessity rely on contributions from biologists trained in different research areas. , 1998; Baum, 2002), and even fewer to examine the implications of evolutionary developmental genetics for phylogenetic systematics.
Looking at the tree, we can view character state changes as transformations that occur once or more than once. In the case of homoplasy, either the primary homology statement is subdivided into two or more statements of secondary homology (parallelism) or the generality of the primary homology statement is increased before the primary homology statement fits the general pattern (secondary loss/reversal). A primary homology statement that is resolved as a synapomorphy (with single evolutionary origin and no reversals) passes the congruence test and is considered homology.