Estimates of heritability and repeatability for reproductive traits in Australian beef cattle

Meyer, Karin; Hammond, Keith; Parnell, P.; Mackinnon, Margaret J.; Sivarajasingam, S.

doi:10.1016/0301-6226(90)90038-8

Cited by 125 publications

(162 citation statements)

References 16 publications

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“…Johnston and Bunter (1996) analysed calving success without adjustment for the categorical nature of the trait, and reported a heritability estimate of 0.11. This is higher than the estimate presented by Meyer et al (1990) in Angus (0.015). The latter authors found heritabilities of about 0.08 in both Hereford and zebu crosses.…”

Section: Resultscontrasting

confidence: 66%

“…Several such components have been investigated as measures of female reproductive performance. In beef cattle, focus has been on calving date (Bourdon and Brinks, 1983;Buddenberg et al, 1990), or the related calving day (Ponzoni, 1992) or days to calving (Meyer et al, 1990;Johnston and Bunter, 1996;Donoghue et al, 2004a). Recently, heifer pregnancy status and the outcome of subsequent rebreeding have attracted interest (Evans et al, 1999;Doyle et al, 2000;Eler et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

“…Recently, heifer pregnancy status and the outcome of subsequent rebreeding have attracted interest (Evans et al, 1999;Doyle et al, 2000;Eler et al, 2004). Calving success (CS) has been studied as well (Meyer et al, 1990;Mercadante et al, 2003;Donoghue et al, 2004d). Rust and Groeneveld (2001) summarised advantages and disadvantages of different component traits.…”

Section: Introductionmentioning

confidence: 99%

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Genetic variability in calving success in Aberdeen Angus cows under extensive recording

Urioste

Chang

Naya

et al. 2007

Animal

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Data from 2032 Uruguayan Aberdeen Angus cows under extensive management and recording practices were analysed with Bayesian threshold-liability sire models, to assess genetic variability in calving success (CS), defined as a different binary trait for each of the second (CS2), third (CS3) and fourth (CS4) calving opportunities. Sire (herd) variances ranged from 0.08 to 0.11 (0.10 to 0.20) and heritability from 0.27 to 0.35, with large credibility intervals. Correlations between herd effects on CS at different calving opportunities were positive. Genetic correlation between CS2 and CS4 was positive (0.68), whereas those involving adjacent calving opportunities (CS2-CS3 and CS3-CS4) were negative, at 20.39 and 20.54, respectively. The residual correlation CS2-CS3 was negative (20.32). The extent of uncertainty associated with the posterior estimates of the parameters was further evaluated through simulation, assuming different true values (20.4, 20.2, 10.2 and 10.4) for the genetic correlations and changes in the degree of belief parameters of the inverse Wishart priors for the sire covariance matrix. Although inferences were not sharp enough, CS appears to be moderately heritable. The quality of data recording should be improved, in order to effect genetic improvement in female fertility.

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Section: Resultscontrasting

confidence: 66%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Genetic variability in calving success in Aberdeen Angus cows under extensive recording

Urioste

Chang

Naya

et al. 2007

Animal

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“…Na literatura, as estimativas de herdabilidade para DPP variam de 0,04 a 0,14 e as de repetibilidade, de 0,10 a 0,29 (López de Torre & Brinks, 1990;Meyer et al, 1990Meyer et al, , 1991Johnston & Bunter, 1996). A baixa herdabilidade dessa característica indica que ela teria pequena resposta à seleção.…”

Section: Resultsunclassified

Análise genética de algumas características reprodutivas e suas relações com o desempenho ponderal na raça Nelore

Pereira¹,

Eler

Ferraz

2001

Arq. Bras. Med. Vet. Zootec.

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“…If the heifer failed to record the birth of a calf before she reached the age of five years, she was placed in category 0. Since the definition of the rate of calving in this study differs from that of Meyer et al (1990) and Rust & Groeneveld (2002), it was decided to refer to this trait as CT rather than calving rate to avoid confusion. The first trait, RET, identifies heifers that are retained in the herd as breeding cows.…”

Section: Methodsmentioning

confidence: 99%

Non-linear model analysis of categorical traits related to female reproduction efficiency in beef cattle

Rust¹,

Schoeman

Westhuizen

et al. 2010

SA J. An. Sci.

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________________________________________________________________________________ AbstractThe utilization of non-linear threshold models and linear animal models to estimate variance components for categorical reproductive traits in beef cattle was investigated. Three traits, retention (RET), stayability (STAY) and calf tempo (CT) were defined. The data set consisted of 36 880 Afrikaner beef cattle measurements recorded over a period of 10 years. After editing, the records of 7 746 females from 473 sires were available for the genetic parameter estimation for RET. The corresponding number of records for STAY and CT were 3 018 (243 sires) and 7 653 (465 sires), respectively. Using GFCAT, sire variances for RET, STAY and CT were estimated as 0.202, 0.072 and 0.114, respectively. With error variances pre-set to one, the heritability estimates on the underlying scale were calculated as 0.67, 0.27 and 0.41 for RET, STAY and CT, respectively. From the three traits analyzed in this study CT probably reflects the true fertility of the bull's female progeny best.________________________________________________________________________________

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Estimates of heritability and repeatability for reproductive traits in Australian beef cattle

Cited by 125 publications

References 16 publications

Genetic variability in calving success in Aberdeen Angus cows under extensive recording

Genetic variability in calving success in Aberdeen Angus cows under extensive recording

Análise genética de algumas características reprodutivas e suas relações com o desempenho ponderal na raça Nelore

Non-linear model analysis of categorical traits related to female reproduction efficiency in beef cattle

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