Genetic parameters for growth of young beef bulls

Vostrý, L.; Veselá, Zdenka; Přibyl, J.

doi:10.5194/aab-55-245-2012

Cited by 4 publications

(6 citation statements)

References 25 publications

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“…These results also confi rmed the importance of heritability of growth characteristics which are modelled by Vostrý et al (2012).…”

Section: Sire Eff Ectsupporting

confidence: 68%

“…The growth of calves and their weaning weight is infl uenced by a number of factors (Toušová et al, 2014), e.g. genotype and heritability (Vostrý et al, 2012) as well as individual (Jakubec et al, 2003;Ducháček et al, 2011), the dam age (Roff eis and Muench, 2007), the sex of calves (Stádník et al, 2008), the occurrence of twins (Krupa et al, 2005), the year and period of calving (Dadi et al, 2002), diffi culty of calving (Eriksson et al, 2004), nutrition (Zahrádková et al, 2010), or herd management (Staněk et al, 2014). The growth of calves at weaning showed low heritability (h² = 0.12-0.27) as published by Szabó et al (2006).…”

Section: Introductionmentioning

confidence: 99%

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The Selected Factors Influenced Growth Ability to Weaning of Aberdeen Angus Cattle

Toušová¹,

Ducháček²,

Stádník³

et al. 2015

Acta Univ. Agric. Silvic. Mendelianae Brun.

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The aim of this study was to evaluate eff ects of sex of calves, year of calving, cows' parity and sire eff ect on growth ability to weaning. The evaluation of growth indicators of Aberdeen Angus cattle was performed in the period of 4 years (2010 to 2013) in 2 diff erent farms. A total of 272 calves (bulls, n = 141; heifers, n = 131) were monitored. The indicators of live weight at birth, live weight at the age of 120 and 210 days, average daily gains from birth to 120 and 210 days of age were observed. Statistical so ware SAS 9.3 was used to analyze the results. The highest result growth parameters of calves were observed from cows on 3 rd and 4 th parity. In 2012 we observed the highest values of calves' growth ability compare to others. In evaluating the sire eff ect diff erences (P < 0.05-0.01) were found mainly between the top three sires from the fi rst evaluated herd (PAA240, ZAA562, ZAA595) and three sires from the second evaluated herd (ZAA675, ZAA697, ZAA762). The order of sires according to weight in 210 days of their off spring is then almost perfect refl ection of the relative breeding values (RBV) for the direct eff ect of growth.

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“…These results also confi rmed the importance of heritability of growth characteristics which are modelled by Vostrý et al (2012).…”

Section: Sire Eff Ectsupporting

confidence: 68%

Section: Introductionmentioning

confidence: 99%

The Selected Factors Influenced Growth Ability to Weaning of Aberdeen Angus Cattle

Toušová¹,

Ducháček²,

Stádník³

et al. 2015

Acta Univ. Agric. Silvic. Mendelianae Brun.

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“…Vesela et al (2011) estimated the genetic indices of beef cattle production traits in the SEUROP system. Vostry et al (2012aVostry et al ( , 2014 described growth evaluation of beef bulls in performance testing stations. Svitakova et al (2014) examined alternative measures of growth potential of bulls in testing stations, whether genetic index estimates of such traits changed over time and whether existing methods for performance testing were appropriate.…”

Section: Cattlementioning

confidence: 99%

Recent developments in cattle, pig, sheep and horse breeding - a review

et al. 2014

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The aim of this review was to summarize new genetic approaches and techniques in the breeding of cattle, pigs, sheep and horses. Often production and reproductive traits are treated separately in genetic evaluations, but advantages may accrue to their joint evaluation. A good example is the system in pig breeding. Simplified breeding objectives are generally no longer appropriate and consequently becoming increasingly complex. The goal of selection for improved animal performance is to increase the profit of the production system; therefore, economic selection indices are now used in most livestock breeding programmes. Recent developments in dairy cattle breeding have focused on the incorporation of molecular information into genetic evaluations and on increasing the importance of longevity and health in breeding objectives to maximize the change in profit. For a genetic evaluation of meat yield (beef, pig, sheep), several types of information can be used, including data from performance test stations, records from progeny tests and measurements taken at slaughter. The standard genetic evaluation method of evaluation of growth or milk production has been the multi-trait animal model, but a test-day model with random regression is becoming the new standard, in sheep as well. Reviews of molecular genetics and pedigree analyses for performance traits in horses are described. Genome -wide selection is becoming a world standard for dairy cattle, and for other farm animals it is under development.

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“…Weight is cumulative over time, and it is difficult to properly account for the influence of systematic environmental effects and of compensatory growth (higher growth at a later time in response to environmentally limited growth in a former). As described by Vostrý et al (2012), gain over an extended period of time is also subject to such influences. For these reasons, it is necessary to proceed very carefully in choosing a genetic evaluation protocol.…”

mentioning

confidence: 99%

“…For these reasons, it is necessary to proceed very carefully in choosing a genetic evaluation protocol. Nešetřilová (2005) described the growth curve for Czech Fleckvieh cattle up to 1400 days of age by a multiphase growth model, Veselá et al (2011) estimated the genetic parameters of beef cattle production traits in the SEUROP system, and Vostrý et al (2012) described growth evaluation of beef bulls in performance testing stations.…”

mentioning

confidence: 99%

Changes over time in genetic parameters for growth in bulls and assessment of suitability of test methods

Svitáková¹,

Bauer²,

Přibyl³

et al. 2014

CZECH J ANIM SCI

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Objectives of the study were to examine alternative measures of growth potential of bulls in testing stations, determine whether genetic parameter estimates of such traits changed over time, and examine whether existing methods for performance testing were appropriate. Records from 1980 to 2010 of 44 425 Fleckvieh bulls in Czech progeny testing stations were analyzed. The following traits were examined: weight at the beginning of the test (150 th day of age), weight at the end of the test (530 th day of age), gain from birth to the beginning of the test, and gain during the test. Fixed effects in five multi-trait animal models were stationyear-season groups, linear and quadratic regressions on age, and regression on heterozygosity (proportion of an individual's loci with alleles from different ancestor breeds). Random effects included additive genetic, permanent environment, and residual variances. Separate analyses were conducted in four consecutive time periods (1980-1987, 1988-1992, 1993-1997, and 1998-2010). Across these time intervals, estimates of additive genetic variance decreased for all of the traits, while estimates of residual variances increased. In consequence, heritability estimates for all of the traits decreased over time. This decrease was most apparent for gain during the test, for which heritability declined by more than 50% over the course of the study. Results demonstrate that over three decades, the system of testing came into conflict with genetic improvement of the breed, possibly because the measured traits changed genetically over the course of selection. Regular analysis of the recorded data, re-estimation of genetic parameters in relation to time, and appropriate modification of existing methods of rearing/fattening in station tests are required. When such inspections are neglected, data from the testing stations may not accurately reflect genetic merit of individual animals.

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Genetic parameters for growth of young beef bulls

Cited by 4 publications

References 25 publications

The Selected Factors Influenced Growth Ability to Weaning of Aberdeen Angus Cattle

The Selected Factors Influenced Growth Ability to Weaning of Aberdeen Angus Cattle

Recent developments in cattle, pig, sheep and horse breeding - a review

Changes over time in genetic parameters for growth in bulls and assessment of suitability of test methods

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