Read e-book online Allozyme Electrophoresis. A Handbook for Animal Systematics PDF

By B. J. Richardson

ISBN-10: 0125878400

ISBN-13: 9780125878401

ISBN-10: 0323139647

ISBN-13: 9780323139649

Inherited enzyme diversifications, studied utilizing electrophoresis, can be utilized as markers for the identity of people, inhabitants constitution research, the delineation of species barriers and phytogenetic reconstruction. the aim of this publication is to explain, in one handy guide, the entire theoretical and functional concerns suitable to these desiring to use electrophoresis as a device for answering such questions.

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Additional info for Allozyme Electrophoresis. A Handbook for Animal Systematics and Population Studies

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The classification system used is hierar­ chical, that is, organisms are grouped into species, the species into genera, genera into families etc. In general, the theoretical basis for grouping organisms into species is different from the basis for grouping at higher levels. The consequences of this difference are fundamental to all levels of electrophoretic study in systematics, from project planning through elec­ trophoresis to data analysis, and so the two categories will be treated separately (for a more detailed coverage, see for example, Mayr, 1969).

E. 4%. The null hypothesis of a single random breeding population is therefore rejected. 1 0 F r e q u e n c y of a l l e l e A ( p ) Fig. 0. 75. SYSTEMATICS 49 represent two different species. This hypothesis is testable since one could reasonably expect to find another locus for which the two forms are fixed for different alleles. One could also reasonably expect, on this hypothesis, that the two forms will show other differences, especially at the morpho­ logical level. These differences may well be subtle and require the use of multivariate statistics.

2) Classify character states for each character as ancestral or derived. 3) Eliminate all ancestral states held in common (symplesiomorphies) from further consideration. 4) Eliminate all uniquely derived states held by a single taxon (autapomorphies) from further consideration. 5) Derive a cladogram based upon shared derived states held by two or more taxa (synapomorphies). Needless to say, the above overview has been greatly simplified. How does one decide on the ancestral state? How does one handle the situation where more than two states occur for a character?

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Allozyme Electrophoresis. A Handbook for Animal Systematics and Population Studies by B. J. Richardson


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