Download Mechanisms of Life History Evolution: The Genetics and by Thomas Flatt, Andreas Heyland PDF

By Thomas Flatt, Andreas Heyland

Lifestyles heritage thought seeks to provide an explanation for the evolution of the foremost gains of lifestyles cycles via reading the ecological components that form age-specific schedules of progress, copy, and survival and through investigating the trade-offs that constrain the evolution of those qualities. even supposing existence heritage thought has made huge, immense growth in explaining the variety of existence heritage suggestions between species, it routinely ignores the underlying proximate mechanisms.

Mechanisms of existence background Evolution argues that many primary difficulties in lifestyles historical past evolution, together with the character of trade-offs, can purely be totally resolved if we start to combine info on developmental, physiological, and genetic mechanisms into the classical existence historical past framework. each one bankruptcy is written via a longtime or up-and-coming chief of their respective box; they not just signify the state-of-the-art but additionally supply clean views for destiny examine. The textual content is split into 7 sections that hide simple options (Part 1), the mechanisms that impact various elements of the existence cycle (growth, improvement, and maturation; copy; and getting older and somatic upkeep) (Parts 2-4), lifestyles historical past plasticity (Part 5), lifestyles background integration and trade-offs (Part 6), and concludes with a synthesis bankruptcy written by means of a sought after chief within the box and an article postscript (Part 7).

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Extra info for Mechanisms of Life History Evolution: The Genetics and Physiology of Life History Traits and Trade-Offs

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1 Why understanding mechanisms is important for answering evolutionary questions While it is clear that knowledge of the proximate basis of life histories does not provide information about the ecological or evolutionary relevance of such mechanisms, it enables evolutionary biologists to address several fundamental questions about life history evolution, including, for example: • What is the function of genes that are genetically variable in natural populations and that contribute to ecological adaptation?

The number and effect size of the involved loci), they rarely achieve sufficient resolution to pinpoint individual candidate genes (see discussion in Roff 2007b and Mackay et al. 2009). , Mackay et al. 2009). Highresolution mapping through recombinant inbred lines and genome-wide association studies have already been successful in characterizing natural polymorphisms underlying genetic variation in complex developmental or life history traits in C. , Kammenga et al. 2007, Palopoli et al. , De Luca et al.

Three QTL were located on separate chromosomes, with those from Cross 1 accounting for 15%, 32%, and 11% of the phenotypic variation in resistance and those from Cross 2 accounting for 8%, 21%, and 15%, respectively. All three QTL were associated with QTL for egg-toadult viability and two were also associated with fecundity (Fig. 2-1). Because the QTL encloses a fairly wide region it is not possible to determine from this analysis if the trade-off is a result of the pleiotropic effects of particular genes or that genes for resistance are linked with genes for the fitness components.

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