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Genetic parameter and genetic trend estimates for reproductive traits in Wistar rats

G. Taroco et al · Universidade Federal de Minas Gerais, Escola de Veterinária · 2020

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Author / responsible party
G. Taroco et al
Publisher
Universidade Federal de Minas Gerais, Escola de Veterinária
Year
2020
ISSN
1678-4162
ISSN
1678-4162
Language
English
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ABSTRACT The aim of this study was to estimate genetic parameters and genetic trends for reproductive traits in Wistar rats. A total of 1,167 data records from 283 females over six generations of monogamous mating pairs was used. Heritability and genetic correlation were estimated through Bayesian inference and genetic trends were calculated by linear regression of breeding values over generations. Heritability estimates for litter size at birth (LS), calving interval (CI), pup mortality (PM) and maternal cannibalism (CAN) presented low magnitude, ranging from 0.01 to 0.13. CAN presented high and positive genetic correlation with LS and PM (0.77 and 0.78, respectively). On the other hand, all the other estimated genetic correlations were not significant. Genetic trend was positive for LS (+0.0900 pups per generation), and negative for PM and CAN (-1.0085 and -0.5217 pups per generation, respectively). For CI the genetic trend was not significant. It is recommended to increase selection intensity on dams in this Wistar rat population in order to accelerate the genetic progress.

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APA 7

al, G. T. E. (2020). Genetic parameter and genetic trend estimates for reproductive traits in Wistar rats. https://doi.org/10.1590/1678-4162-11653

MLA

al, G. Taroco et. "Genetic parameter and genetic trend estimates for reproductive traits in Wistar rats." 2020. https://doi.org/10.1590/1678-4162-11653.

Chicago

al, G. Taroco et. 2020. "Genetic parameter and genetic trend estimates for reproductive traits in Wistar rats.". https://doi.org/10.1590/1678-4162-11653.

Harvard

al, G. T. E. 2020, Genetic parameter and genetic trend estimates for reproductive traits in Wistar rats, Universidade Federal de Minas Gerais, Escola de Veterinária, available at: https://doi.org/10.1590/1678-4162-11653 [Accessed 9 Aug. 2026].

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Title
Genetic parameter and genetic trend estimates for reproductive traits in Wistar rats
Author / contributors
G. Taroco et al
Publisher
Universidade Federal de Minas Gerais, Escola de Veterinária
Publication year
2020
ISSN
1678-4162
ISSN
1678-4162
Language
English

Subjects

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genetic correlation; heritability; selection criteria; Wistar
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