Heritabilities and Correlations Among Body Condition Scores, Production Traits, and Reproductive Performance

Dechow, C.D.; Rogers, G.W.; Clay, J.

doi:10.3168/jds.s0022-0302(01)74476-1

Cited by 89 publications

(117 citation statements)

References 22 publications

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“…The results presented generally correspond with the findings estimated by various authors in other populations. In the study by Dechow et al (2001), the estimated heritabilities for milk production in the first and second lactations were 0.29 and 0.17, respectively, which is generally close to the results estimated by Dal Zotto et al (2007) in Italian Brown Swiss (0.15). Our result of 0.20 for MLK, however, is also closer to the estimate of Dechow et al (2001) published for cows on the second lactation.…”

Section: Heritabilitysupporting

confidence: 88%

“…In the study by Dechow et al (2001), the estimated heritabilities for milk production in the first and second lactations were 0.29 and 0.17, respectively, which is generally close to the results estimated by Dal Zotto et al (2007) in Italian Brown Swiss (0.15). Our result of 0.20 for MLK, however, is also closer to the estimate of Dechow et al (2001) published for cows on the second lactation. Very low heritabilities of 0.09 for fat production and of 0.13 for protein production were estimated by Dal Zotto et al (2007) compared to our estimates of 0.21 and 0.23, respectively.…”

Section: Heritabilitysupporting

confidence: 88%

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Genetic parameters for female fertility and milk production traits in first-parity Czech Holstein cows

Zink¹,

Lassen²,

Štípková³

2012

Czech J. Anim. Sci.

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ABSTRACT:The aim of this study was to estimate genetic parameters for female fertility and production traits in first-parity Czech Holstein cows and to quantify the effect of using this information on the accuracy of a selection index in seven different scenarios. In order to estimate genetic (co)variance components, the DMU software running an AI-REML algorithm was used. The analyses were made using a series of bivariate animal models. The pedigree included 164 125 animals and it was set up using a pruned animal model design. The present study included the following female fertility traits for the first lactations: calving to the first insemination (CF), days open (DO), calving from the first to the last insemination (FL), and milk production traits: milk production (MLK), kg of fat (FAT), and kg of protein (PROT). The heritability for all the investigated fertility traits was low and close to 0. Moderate heritabilities for production traits ranging from 0.20 (MLK) to 0.23 (PROT) were estimated. The strongest unfavourable correlation was found between PROT and DO (0.49). Other estimated correlations between fertility traits and production traits were moderate, ranging from 0.26 to 0.41. The results of this study evidence that cows with the poorest genetic potential for reproductive performance are those having high genetic potential for milk production and milk components. The results also show that the number of days from calving to new pregnancy depends on the production level. Seven investigated scenarios using selection index theory show a clear trend for increasing accuracy when more fertility traits were added as well as when higher numbers of daughters with information on reproduction traits per sire were available.

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Section: Heritabilitysupporting

confidence: 88%

Section: Heritabilitysupporting

confidence: 88%

Genetic parameters for female fertility and milk production traits in first-parity Czech Holstein cows

Zink¹,

Lassen²,

Štípková³

2012

Czech J. Anim. Sci.

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“…In Canadian Holsteins, Jamrozik et al (2005) reported 0.10 and 0.07, and Sun et al (2009) (2005) were 0.03 each. Other published heritability estimates for FLI1 ranged from 0.03 to 0.04 (Dechow et al, 2001;Wall et al, 2003). Our estimates of within-herd heritability for fertility traits in the second lactation (Table 3) were lower (CFI2 0.03, DO2 0.04, FLI2 0.02) than those in the first lactation.…”

Section: Heritabilitymentioning

confidence: 52%

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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“…The negative genetic correlations increased with the progressing lactation; from r g = -0.33 after calving to r g = -0.50 on day 240. Dechow et al (2001) also reported the negative relationship between BCS and milk yield, which was characterized by the estimated value of r g ; it ranged from -0.27 to -0.31.…”

Section: Resultsmentioning

confidence: 95%

“…The results of these studies are inconsistent in the reported relationship between BCS and milk yield. Some authors determined genetic correlations between these traits as slightly negative (Berry et al, 2002;Pryce et al, 2002), whereas others found slightly positive correlations (Dechow et al, 2001).…”

mentioning

confidence: 99%

Relationships among body condition score, milk yield and sires' breeding value for beef production efficiency in Czech Fleckvieh cattle

Bouška¹,

Štípková²,

Pytloun³

et al. 2008

CZECH J ANIM SCI

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ABSTRACT:The objective of this study was to analyze the relationships among cows' body condition score before calving, subsequent BCS changes, milk yield, lactation characteristics and their sires' relative breeding value for net daily gain. Increasing the relative breeding value of net daily gain in the sires was associated with increased BCS in their daughters. The differences ranged between 0.02 and 0.18 points in the particular lactation periods, but they were not statistically significant. The group of cows with the highest BCS before calving showed the highest BCS decrease (-0.25 points) after calving (P < 0.01); the BCS loss lasted for 3 months. The analysis of the relationship between the relative breeding value of sires for net daily gain and milk yield of their daughters showed a negative effect of RBV NG ≤ 89 on the daughters' milk yield (P < 0.05), while the negative differences were up to -279.12 kg of fat-protein corrected milk. The effect of this trait on the lactation curve was also analyzed.

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Heritabilities and Correlations Among Body Condition Scores, Production Traits, and Reproductive Performance

Cited by 89 publications

References 22 publications

Genetic parameters for female fertility and milk production traits in first-parity Czech Holstein cows

Genetic parameters for female fertility and milk production traits in first-parity Czech Holstein cows

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

Relationships among body condition score, milk yield and sires' breeding value for beef production efficiency in Czech Fleckvieh cattle

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