Heritability

Genetic study of skin thickness and its association with postweaning growth in Nellore cattle: estimation of the genetic parameters

A. M. Maiorano, Oliveira, M. C. S., Cyrillo, J. N. S. G., Albuquerque, L. G., Curi, R. A., Silva, J. A. I. I. V., Maiorano, A. M., Oliveira, M. C. S., Cyrillo, J. N. S. G., Albuquerque, L. G., Curi, R. A., and Silva, J. A. I. I. V., Genetic study of skin thickness and its association with postweaning growth in Nellore cattle: estimation of the genetic parameters, vol. 15, p. -, 2016.

The objective of the present study was to estimate genetic parameters for skin thickness (ST) and postweaning weight gain (PWG550) in Nellore cattle. Records were obtained from 152,392 Nellore animals born between 2001 and 2011. ST was measured in the posterior region of the animal’s scapula with a millimeter caliper. The animals were assigned to different contemporary groups, formed on the basis of farm, year, sex, feeding regimen at weaning, date of weaning, feeding regimen at 450 days of age, and date of weighing at 450 days of age.

Influence of various quantitative trait loci (QTL) mapping methods on the mapping accuracy under varying heritability levels

C. F. Su, Liu, Z. B., and Li, Y. G., Influence of various quantitative trait loci (QTL) mapping methods on the mapping accuracy under varying heritability levels, vol. 14, pp. 13003-13012, 2015.

The study of quantitative trait effects is of great significance for molecular marker-assisted breeding. The accuracy of quantitative trait loci (QTL) mapping is the key factor affecting marker-assisted breeding, and is extremely significant. The effect of different heritability rates (10, 30, 50, 70, and 90%) on the accuracy of QTL mapping of five recombinant inbred lines (RILs) were analyzed via computer simulation. RILs display additive and epistatic genetic effects.

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