Genetic correlations between longevity and conformation traits in the Czech Holstein population

Zavadilová, Ludmila; Štípková, M.

doi:10.17221/5566-cjas

Cited by 65 publications

(65 citation statements)

References 26 publications

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“…The means of composite traits ranged from 78.10 (SD = 4.52) for overall udder score to 81.95 (SD = 4.16) for size, and showed that the conformation of Polish cows corresponded well with the conformation standard. The means of most composite traits in our study were similar to those obtained by Ptak et al (2011) for the Polish population and Zavadilova and Stipkova (2012) for Czech Holstein cows. The average for stature of Polish HF cows was 143 cm (Table 1), slightly less than the mean obtained by Lassen and Mark (2008) for Danish Holstein cows (144.3 cm).…”

Section: Resultssupporting

confidence: 86%

“…The range of heritabilities for composite traits was similar to the results of the previous study in Polish Holsteins: from 0.11 for overall feet and leg score to 0.39 for size (Ptak et al 2011). Zavadilova and Stipkova (2012) also reported the lowest heritability for feet and legs (0.12), but they estimated the highest heritability not for size as in this paper but for dairy form (0.28).…”

Section: Resultsmentioning

confidence: 42%

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Genetic relationship between lactation persistency and conformation traits in Polish Holstein-Friesian cow population

Otwinowska-Mindur¹,

Ptak²,

Jagusiak³

2016

CZECH J ANIM SCI

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ABSTRACT:The objective of this study was to find genetic relationships between lactation persistency and conformation traits of Polish Holstein-Friesian cows. The data were derived from SYMLEK -the Polish National Database. The analysis used 22 conformation traits and 3 persistency measures of 18 216 first lactation cows. Persistency was defined as milk yield in the second 100 days in milk (DIM) divided by the yield in the first 100 DIM, milk yield in the third 100 DIM divided by the yield in the first 100 DIM, and milk yield at 280 DIM divided by milk yield at 60 DIM. The lactation curve was modelled with fourth-order Legendre polynomials using a multiple-trait prediction method. The multiple-trait REML method was applied for (co)variance component estimation. The linear model for persistency included fixed effects of herd-year-season of calving, age of calving class, and random animal effect; the linear model for type traits included fixed effects of herd-year-season of calving-classifier, age of calving class, lactation stage, and random animal effect. Stature and composite type traits (except type and conformation) were moderately or strongly genetically correlated with each of the three persistency measures. Genetic correlations of lactation persistency with overall feet and leg score and overall udder score were high and positive, whereas the correlations with stature and size were high but negative. All linearly scored traits had little genetic relationship with persistency measures except for rear udder height, udder width, and foot angle. In these three cases the genetic correlations with persistency measures were relatively high, positive, and preferable. The obtained genetic correlations suggest that increased weights of composite traits like size, overall feet and leg score, and overall udder score in the selection index, as well as selection for better rear udder height and foot angle, might cause a favourable correlated response in persistency.

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Section: Resultssupporting

confidence: 86%

Section: Resultsmentioning

confidence: 42%

Genetic relationship between lactation persistency and conformation traits in Polish Holstein-Friesian cow population

Otwinowska-Mindur¹,

Ptak²,

Jagusiak³

2016

CZECH J ANIM SCI

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“…Estimated heritability for LPL within herds was small (0.09) but higher than the value of 0.03 reported by Zavadilová and Štípková (2012) for Czech Holsteins or 0.04 by Páchová et al (2005). The within-herd heritability reported in our study was similar to results of Vollema and Groen (1998), who reported an estimate of 0.07 in Danish Holsteins using linear model analysis of functional longevity.…”

Section: Heritabilitysupporting

confidence: 53%

Genetic relationship of functional longevity with female fertility and milk production traits in Czech Holsteins

Zavadilová¹,

Zink²

2013

CZECH J ANIM SCI

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ABSTRACT:The objectives of this study were to estimate heritabilities of and genetic correlations among longevity, milk production, and female fertility traits of Holstein cows. Fertility traits were days open, interval from parturition to first service, and days between the first and last insemination in the first and second lactation, respectively. Production traits were first lactation milk, fat, and protein yield. Functional longevity was defined as the number of days between the first calving and culling, i.e. the length of the productive life. The linear animal model included fixed effects of month-year of first calving, regression on age at first calving, regression on milk yield (only for longevity), and random effects of herd-year, animal, and residual. Heritability estimates for fertility traits ranged from 0.02 ± 0.009 to 0.06 ± 0.004. Heritability of longevity was 0.09. Heritability estimates for production traits ranged from 0.29 ± 0.009 (fat and protein yield) to 0.34 ± 0.009 (milk yield). Genetic correlations of longevity with fertility were moderate and favourable, ranging from -0.37 ± 0.068 to -0.44 ± 0.055, except the days between the first and last insemination in the second lactation. Genetic correlations of fertility with production traits were moderate to high and unfavourable, ranging from 0.48 ± 0.042 to 0.65 ± 0.034. Substantial herd-year correlations were found between fertility traits. Residual correlations were small except for those between production traits (> 0.85) and between days open and days between the first and last insemination (0.87). Month-year of first calving effects for longevity declined between 1994 and 2002, while those for production traits and for fertility increased slightly or remained stable during this period. Between 1991 and 2003, genetic trend for longevity declined and increased for production. Estimated genetic changes for fertility were unfavourable.

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“…In their study du Toit et al (2012) reported a similar value of -0.19 for genetic correlations between body depth and number of lactations in Jerseys. Higher genetic correlations between longevity and body depth than in the present study were -0.23 for Czech Holstein by Zavadilova and Stipkova (2012), -0.26 for Holstein by Kern et al (2015), and 0.28 for Austrian Fleckvieh (Fuerst et al 2013). For Aosta Red Pied, Mazza et al (2016) found medium negative genetic correlations between test-day milk, fat and protein yield, and muscularity conformation score in dual-purpose cattle, values of -0.42, -0.37, -0.34, respectively.…”

Section: Resultscontrasting

confidence: 46%

Untitled

2022

Czech J. Anim. Sci.

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Novotný L., Frelich J., Beran J., Zavadilová L. (2017): Genetic relationship between type traits, number of lactations initiated, and lifetime milk performance in Czech Fleckvieh cattle. Czech J. Anim. Sci., 62, 501-510.Genetic relationship was analyzed between type traits and longevity measures in dual-purpose cattle. Data from 91 486 Czech Fleckvieh cows first calved between 2003 and 2009 were used. Longevity was defined as the actual number of lactations initiated per cow and also as functional longevity, which incorporated an adjustment to account for variation in voluntary culling based upon milk production. Lifetime performance was defined as cumulative milk production through the 6 th parity. All cows were scored for conformation traits during their first lactation. Genetic correlations between these traits and longevity measures were estimated by bivariate analysis using the DMU variance component program package. Type trait heritabilities ranged from 0.30 to 0.59, while heritabilities for longevity and functional longevity were 0.06 and 0.05, respectively. Heritability of lifetime performance was 0.08. Genetic correlations between type traits and longevity measures ranged from low to intermediate values. Genetic correlations of the measured body size traits to the real and functional longevity ranged from -0.06 to -0.29, for udder traits from -0.02 to 0.33, and for foot and leg traits from -0.03 to 0.17. Genetic correlations between the measured body size traits and lifetime performance ranged from -0.03 to -0.30, for udder traits from 0.05 to 0.47, for foot and leg traits from -0.07 to 0.15. Genetic correlations of composite trait scores for frame, muscularity, feet and legs, and udder with longevity traits ranged from -0.20 to 0.41 and for lifetime performance -0.14 to 0.51. The highest genetic correlations between a type trait and functional longevity were for composite udder score (0.25), feet and legs (0.26), and udder depth (0.33), suggesting that these traits could serve as indicators of functional longevity. We conclude that selection based upon easily and inexpensively measured type traits could improve functional longevity of cows as well as lifetime milk production.

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Genetic correlations between longevity and conformation traits in the Czech Holstein population

Cited by 65 publications

References 26 publications

Genetic relationship between lactation persistency and conformation traits in Polish Holstein-Friesian cow population

Genetic relationship between lactation persistency and conformation traits in Polish Holstein-Friesian cow population

Genetic relationship of functional longevity with female fertility and milk production traits in Czech Holsteins

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