Longevity

Estimates of genetic parameters for stayability and their associations with traits of economic interest in Gir dairy cows

R. M. O. Silva, Boligon, A. A., Fernandes, A. R., Filho, A. E. Vercesi, L. Faro, E., Tonhati, H., Albuquerque, L. G., Fraga, A. B., Silva, R. M. O., Boligon, A. A., Fernandes, A. R., Filho, A. E. Vercesi, L. Faro, E., Tonhati, H., Albuquerque, L. G., and Fraga, A. B., Estimates of genetic parameters for stayability and their associations with traits of economic interest in Gir dairy cows, vol. 15, p. -, 2016.

The objective of the present study was to estimate genetic parameters for stayability at 60 months of age (STAY60) and its association with first lactation cumulative milk yield (P305), age at first calving (AFC), and first calving interval (FCI), in order to adopt these traits as selection criteria for longevity in Gir dairy cattle. Records for 2770 cows born between 1982 and 2008 from six herds in the Brazilian states of Minas Gerais, São Paulo, and Paraíba were analyzed. The (co)variance components were estimated by a Bayesian approach using bivariate animal models.

Arm-Gal4 inheritance influences development and lifespan in Drosophila melanogaster

F. A. Slade and Staveley, B. E., Arm-Gal4 inheritance influences development and lifespan in Drosophila melanogaster, vol. 14, pp. 12788-12796, 2015.

The UAS-Gal4 ectopic expression system is a widely used and highly valued tool that allows specific gene expression in Drosophila melanogaster. Yeast transcription factor Gal4 can be directed using D. melanogaster transcriptional control elements, and is often assumed to have little effect on the organism.

Genetic association of productive and reproductive traits with stayability in Nellore cattle: analysis using Bayesian models

E. C. A. Rizzo, Neto, F. R. A., Diaz, I. D. P. S., Dias, M. M., Costa, R. B., Ventura, H. T., Oliveira, H. N., and Falcão, A. J. S., Genetic association of productive and reproductive traits with stayability in Nellore cattle: analysis using Bayesian models, vol. 14, pp. 14956-14966, 2015.

We evaluated the genetic association of growth traits [weight adjusted to 205 days of age (W205), 365 days of age (W365), and 550 days of age (W550); weight gain between 205 days of age and 365 days of age (WG1) and between 365 days of age and 550 days of age (WG2)] and reproductive traits [age at first calving (AFC); first calving interval (FCI)] with stayability in the herd (STAY), using Bayesian inference in linear and threshold models. We defined STAY as the probability of a cow calving three or more times before the age of 76 months, given that she had calved at least once.

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