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Genetics. Jul 2000; 155(3): 1459–1468.
PMCID: PMC1461148

Codominant analysis of banding data from a dominant marker system by normal mixtures.

Abstract

Amplified fragment length polymorphisms (AFLPs) currently are among the most widely used marker systems. In many studies, AFLPs are analyzed on the basis of the presence or absence of a band on an electrophoretic gel. As a result, dominant homozygous individuals are not distinguished from heterozygous individuals, resulting in a considerable loss of information. This article shows how codominant information can be obtained if the amount of PCR products is quantified. Due to measurement variation, genotyping on the basis of such information is not error-free. We propose use of normal mixture distributions to determine the most likely genotype, given the data. The method is exemplified using AFLP data from sugar beet.

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Selected References

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  • Gutierrez RG, Carroll RJ, Wang N, Lee GH, Taylor BH. Analysis of tomato root initiation using a normal mixture distribution. Biometrics. 1995 Dec;51(4):1461–1468. [PubMed]

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