Additive genetic relationship of longevity with fertility and production traits in Nellore cattle based on bivariate models

Melis, M. H. Van; Oliveira, Henrique Nunes de; Eler, Joanir Pereira; Ferraz, José Bento Sterman; Casellas, J.; Varona, L.

doi:10.4238/vol9-1gmr710

Cited by 31 publications

(23 citation statements)

References 43 publications

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“…The posterior mean heritability of SURV, measured as the liability to reach the following parity was 0.05, substantially lower than the results presented by Gonzá lez-Recio and Alenda (2007) and Van Melis et al (2010) using the same statistical approach as Holstein and Nellore, respectively. Moreover, the figure is within the range of results reported by Forabosco et al (2006) and Zavadilova et al (2009) in Chianina and Fleckvieh or Simmental, using linear models and survival analysis.…”

Section: Survcontrasting

confidence: 66%

“…The results indicate a positive correlation of survival with W120, W210, CCW and FAT and negative correlation with CON. A positive genetic correlation with weight has previously been suggested by several authors (Rogers et al, 2004;Tarres et al, 2004;Zavadilova et al, 2009;Van Melis et al, 2010). However, there was almost no correlation with BW; this was probably caused by the positive correlation between dam and calf BW and by the association of these traits with calving difficulty, as noted previously.…”

Section: Genetic Correlationssupporting

confidence: 50%

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Genetic correlation of longevity with growth, post-mortem, docility and some morphological traits in the Pirenaica beef cattle breed

Varona

Moreno

Altarriba

2012

Animal

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Survival or longevity is an economically relevant trait in cattle. However, it is not currently included in cattle selection criteria because of the delayed recording of phenotypic data and the high computational demand of survival techniques under proportional hazard models. The identification of longevity-correlated traits that can be early registered in lifetime would therefore be very useful for beef cattle selection processes. The aim of this study was to estimate the genetic correlation of survival (SURV) with: growth -birth weight (BW), weight at 120 days (W120), weight at 210 days (W210); carcass -cold carcass weight (CCW), conformation (CON), fatness (FAT) and meat colour (COL); teat morphology -teat thickness (TT), teat length (TL) and udder depth (UD); leg morphology -forward (FL) and backward legs (BL); milk production (MILK) and docility (DOC). In the statistical analysis, SURV was measured in discrete-time intervals and modelled via a sequential threshold model. A series of independent bivariate Bayesian analyses between cow survival and each recorded trait were carried out. The posterior mean estimates (and posterior standard deviation) for the heritability of SURV was 0.05 (0.01); and for the relevant genetic correlations with SURV were 0.07 (0.04), 0.12 (0.05), 0.10 (0.05), 0.15 (0.05), 20.18 (0.06), 0.33 (0.06) and 0.27 (0.15) for BW, W120, W210, CCW, CON, FAT and COL, respectively.

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Section: Survcontrasting

confidence: 66%

Section: Genetic Correlationssupporting

confidence: 50%

Genetic correlation of longevity with growth, post-mortem, docility and some morphological traits in the Pirenaica beef cattle breed

Varona

Moreno

Altarriba

2012

Animal

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“…The heritabilities estimated in the present study are within the range reported in the literature for Nellore cattle, with estimates of 0.22-0.55 for WW, 0.17-0.20 for AFC, and 0.25-0.30 for WG (Pereira et al, 2001(Pereira et al, , 2002Van Melis et al, 2010;Boligon et al, 2010Boligon et al, , 2011. Similarly, maternal heritability (0.07 ± 0.01) for WW was similar to estimates obtained in other Nellore herds (Pereira et al, 2001;Boligon et al, 2010).…”

Section: Discussionsupporting

confidence: 88%

Genetic correlations between heifer subsequent rebreeding and age at first calving and growth traits in Nellore cattle by Bayesian inference

Boligon

Baldi²,

Albuquerque³

2012

Genet. Mol. Res.

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ABSTRACT. We estimated heritability for subsequent rebreeding (SR) of heifers and genetic correlations between this trait and weaning weight (WW), weight gain from weaning to yearling (WG), age at first calving (AFC), and mature cow weight (MW), in order to evaluate whether SR could be included as selection criterion in Nellore cattle. The SR of heifers was defined by attributing a value of 1 (success) or 0 (failure) to heifers that calved or not, respectively, given that they had calved once before. Records from 127,430 Nellore animals were analyzed. Genetic parameters were estimated by Bayesian inference using a nonlinear (threshold) animal model for SR and a linear animal model for the other traits in three-trait analyses, including SR and WW in all analyses. The posterior means of heritability for SR, WW, WG, AFC, and MW were 0.18 ± 0.02, 0.21 ± 0.01, 0.30 ± 0.01, 0.21 ± 0.01, and 0.45 ± 0.04, respectively. The posterior mean estimates of genetic correlations between SR and WW, WG, AFC, and MW were -0.20 ± 0.06, 0.31 ± 0.07, -0.77 ± 0.05, and -0.15 ± 0.09, respectively. Based ©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research 11 (4): 4516-4524 (2012) Heifer subsequent rebreeding and other trait correlations 4517 on these genetic correlations, selection for higher gains for WG and younger AFC should result in an increase in heifer SR rates, while long-term selection for increasing WW should promote unfavorable responses in heifer SR. The use of breeding values for heifer SR as a selection criterion of Nellore bulls could increase heifer SR rate without significant changes in MW.

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“…Neves et al (2012) estimated 0.17 for heritability using the same definition of NC53. Van Melis et al (2010) presented estimates of heritability ranging from 0.17 to 0.20 in multivariate analysis for survival (number of calvings until cow death), using a sequential threshold model. Generally, most of the studies related to the evaluation of traits that measure longevity or length of productive life in cows, do it by adopting STAY in the following definition: probability of a cow to remain in herd until a specific age, when the opportunity to reach that age is given (Hudson and Van Vleck, 1981).…”

Section: Resultsmentioning

confidence: 99%

Genetic relationship among reproductive traits in Nellore cattle

Guarini¹,

Neves²,

Schenkel

et al. 2015

Animal

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In order to achieve improvements in production efficiency in livestock, herds of high sexual precocity and good fertility are needed. These traits increase the availability of animals in herd, either for sale or selection, allowing both greater selective intensity and greater genetic progress. This study aimed at estimating genetic parameters for reproductive traits measured directly in females in order to verify whether they could be used as selection criteria for genetic improvement in Nellore cows, as well as estimating the genetic relationship among these traits and scrotal circumference (SC), the traditional selection criterion for sexual precocity in cattle. In addition to SC, stayability (STAY), number of calvings at 53 months (NC53) and heifers rebreeding (HR) were studied. The (co)variances and genetic parameters were estimated using Bayesian inference. STAY, NC53 and HR were analyzed assuming a threshold model, whereas SC was analyzed with a linear model. Heritability estimated for NC53 was 0.22, and this trait was strongly and positively correlated with STAY, meaning selection for NC53 would improve productive longevity of Nellore cows. Correlations estimated between HR and STAY (≈0.97) and between HR and NC53 (≈0.99) allow an improvement on HR rates if selection was applied to traits related to longevity. Genetic correlations among SC and female reproductive traits were positive but weak, suggesting the need to use reproductive traits directly measured in females in order to obtain greater improvements in sexual precocity and longevity.

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Additive genetic relationship of longevity with fertility and production traits in Nellore cattle based on bivariate models

Cited by 31 publications

References 43 publications

Genetic correlation of longevity with growth, post-mortem, docility and some morphological traits in the Pirenaica beef cattle breed

Genetic correlation of longevity with growth, post-mortem, docility and some morphological traits in the Pirenaica beef cattle breed

Genetic correlations between heifer subsequent rebreeding and age at first calving and growth traits in Nellore cattle by Bayesian inference

Genetic relationship among reproductive traits in Nellore cattle

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