Genetic parameters for performance, feed efficiency, and carcass traits in Senepol heifers

Novo, L.C.; Gondo, A.; Gomes, Rodrigo da Costa; Fernandes, José Artur Barroso; Ribas, M. N.; Brito, Luiz F.; Laureano, Monyka Marianna Massolini; Araújo, Cláudio Vieira de; Menezes, G.R.O.

doi:10.1016/j.animal.2020.100160

Cited by 5 publications

(2 citation statements)

References 24 publications

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“…This value exceeds that of Baldi et al (2010), Boldt et al (2018), andRezende et al (2022), who found estimates ranging from 0.22, 0.29 and 0.32 in the Canchim, Red Angus, and Charolais breeds, respectively. Conversely, a heritability estimate similar to our findings was reported by Novo et al (2021), who recorded a value of 0.48 in Senepol heifers aged between 10 to 16 months. Given the heritability coefficients identified in this study, we propose that genetic progress in weight gain can be achieved through an effective response to direct selection, ultimately leading to the production of heavier animals.…”

Section: Resultssupporting

confidence: 92%

Estimation of genetic parameters for reproductive traits evaluated by ultrasonography in Senepol heifers

Pereira,

Gomes,

Faria

et al. 2024

Sem. Ci. Agr.

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Studies on reproductive tract score (RTS) and antral follicle count (AFC) in Senepol cattle are limited. These traits are essential as they are linked to the reproductive ability and reproductive performance of animals. Understanding the heritability and genetic correlation of these traits is crucial for guiding selection programs and selecting animals with greater reproductive efficiency and higher production potential. Therefore, this study aimed to estimate the genetic parameters of weight, RTS, and AFC in Senepol cattle using transrectal ultrasonography. Reproductive data were collected from 850 female Senepol cattle aged 10-16 months. At the time of evaluation, the following were measured: RTS traits (scores from 1 to 5), AFC (0 to 100), and female weight (kg). Variance and covariance components, genetic heritability, and correlations were estimated by univariate and bivariate analyses using the bull model. Heritability estimates were moderate for AFC (0.52) and weight (0.46), and low for RTS (0.12). The genetic correlation between RTS and AFC was almost zero (-0.05). The estimated genetic correlation between weight and AFC was -0.41, while the correlation between weight and RTS was 0.48. Selective breeding of AFC and RTS can enhance the reproductive efficiency of the herd and result in animals with earlier pubertal age and increased fertility.

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Section: Resultssupporting

confidence: 92%

Estimation of genetic parameters for reproductive traits evaluated by ultrasonography in Senepol heifers

Pereira,

Gomes,

Faria

et al. 2024

Sem. Ci. Agr.

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“…In contrast to these studies, Mao et al (2013) found a positive correlation in Charolais (0.19) and in Angus (0.09), to those found by Novo et al (2021) in Senepol heifers (0.19). Studies by Sun et al (2019) suggest a differential regulation of gene expression linked to muscle, adipose tissue, and rumen tissue deposition in efficient feeding animals, as well as the same mechanisms in the last two at the epithelial level.…”

Section: Resultscontrasting

confidence: 78%

Genetic correlation between feed efficiency and carcass traits in Nellore cattle in Brazil

Gomes

Lôbo²,

Faria³

2023

Sem. Ci. Agr.

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The aim was to estimate the genetic correlations between residual feed intake (RFI) and dry matter intake (DMI) with carcass finish (CF), rib eye area (REA), and marbling (MAR) of Nellore cattle. Data from 7,808 animals were considered. In addition, data from 2,261 females included in the complete database were also considered. Estimates of variance and covariance components, as well as heritabilities and genetic correlations were obtained by means of two-character analysis under animal model. Heritability estimates were found to be moderate for the RFI (0.22) and DMI (0.29) traits. It was observed that genetic correlation was close to zero for all traits, except between RFI and REA (-0.11). However, considering the female population, there was an increase in the estimated genetic correlation between RFI and DMI, although still a favorable genetic association of low magnitude (-0.30). There was also an increase in the genetic association of REA with RFI (-0.21). It can be concluded that the direct selection for RFI and DMI will not influence the CF, MAR, or REA of Nellore cattle. However, this selection may generate some favorable responses in MAR and REA in Nellore females.

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Changes in the physiological, hematological and parasitological parameters of Dorper sheep in relation to residual feed intake and confinement environment

Matos,

de Lucena,

Castro

et al. 2024

Journal of Thermal Biology

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Genetic parameters for performance, feed efficiency, and carcass traits in Senepol heifers

Cited by 5 publications

References 24 publications

Estimation of genetic parameters for reproductive traits evaluated by ultrasonography in Senepol heifers

Estimation of genetic parameters for reproductive traits evaluated by ultrasonography in Senepol heifers

Genetic correlation between feed efficiency and carcass traits in Nellore cattle in Brazil

Changes in the physiological, hematological and parasitological parameters of Dorper sheep in relation to residual feed intake and confinement environment

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