Journal of Heredity 2003:94(2)
© 2003 The American Genetic Association 94:175-179
Brief Communication |
Asymptotic Variances of QTL Estimators With Selective DNA Pooling
From the Departamento de Estadística, Facultad de Ciencias, C/Calvo Sotelo 33007 Oviedo, Asturias, Spain (Carleos); Departamento de Ciencias Agroforestales, Universidad de Valladolid, Palencia, Spain (Baro); Departamento de Produccion Animal, Universidad Complutense, Madrid, Spain (Cañon); and Departamento de Estadistica, Universidad de Oviedo, Oviedo, Spain (Corral).
Address correspondence to Carlos Carleos at the address above, or e-mail: carleos{at}pinon.ccu.uniovi.es.
Investigation on QTL-marker linkage usually requires a great number of observed recombinations, inferred from combined analysis of phenotypes and genotypes. To avoid costly individual genotyping, inferences on QTL position and effects can instead make use of marker allele frequencies. DNA pooling of selected samples makes allele frequency estimation feasible for studies involving large sample sizes. Linkage studies in outbred populations have traditionally exploited half-sib family designs; within the animal production context, half-sibships provide large families that are highly suitable for DNA pooling. Estimators for QTL position and effect have been proposed that make use of information from flanking markers. We present formulas derived by the delta method for the asymptotic variance of these estimators.
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