Lifetime yield and herd life for crosses of Friesian strains in Poland

Zarnecki, A.; Norman, H.D.; Jamrozik, J.

doi:10.22358/jafs/69500/1997

Cited by 8 publications

(5 citation statements)

References 10 publications

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“…The present means are higher than those reported by Sultan and Khattab (1989) working on another herd of Friesian cattle in Egypt (7723 kg, 1228 d, 42 mo, and 3.2, respectively). Also, the present mean of NLC is higher than that reported by Zarnecki et al (1990) (3.9). The differences between our results and those reported by other workers could be due to differences in climatic and managerial conditions and / or genetic differences in herds.…”

Section: Resultscontrasting

confidence: 95%

“…The corresponding genetic correlations between M1 and each of TMY and TLP were unity. The present results are higher than those estimates reported by Tong et al (1979), Weller et al (1986), Zarnecki et al (1990) and Khattab et al (1994) which ranged from 0.78 to 0.89. Therefore, selection for high first lactation milk yield should lead to increased of lifetime milk production and total lactation period.…”

Section: Resultscontrasting

confidence: 82%

“…The product moment correlations between M1 and each of TMY and TLP are 0.96 and 0.98. The present estimate are higher than those of Hoque and Hodges (1981), Weller et al (1986), Rogers et al (1989), Zarnecki et al (1990) and Khattab et al (1994) ranged from 0.76 to 0.80. The present results indicate that selection of sires according to first lactation increase TMY and TLP also, it is useful to depend on the first lactation in sire evaluation rather than on lifetime production.…”

Section: Resultscontrasting

confidence: 64%

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Lifetime Production and Longevity of Holstein Friesian Cows in Relation to Their Sire Transmitting Ability

Atil¹,

Khattab²

1998

Pakistan J. of Biological Sciences

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A total of 193 Holstein Friesian cows sired by 39 bulls at Dena farm in Egypt, during the period from 1987 to 1991 were used to estimate phenotypic and genetic parameters of lifetime production and longevity traits in Friesian cows in Egypt and to study relationship between sire transmitting ability (ETA's) of sires for first 305 day milk yield and each of lifetime production and longevity traits. Heritability and phenotypic and genetic correlations were estimated by paternal half sibs correlations. Heritability estimates were 0.18, 0.24, 0.04, 0.05 and 0.00 for first 305 day milk yield, total lifetime milk production, total lactation period, productive life and number of lactations completed. All phenotypic (0.14-0.97) and genetic 0.90-1.00) correlations among different traits studied were significant except the correlations between number of lactations completed and different traits studied. Sires with at least ten daughters were evaluated by best linear unbiased prediction procedures. Sires with positive expected (ETA's) for first 305 day milk production, have positive values for lifetime production and longevity traits. Product moment correlations of expected ETA's for first 305 day milk yield with lifetime production and longevity traits ranged from (0.09 to 0.96). Sire selection for higher milk yield in the first lactation would lead to a slight increase in longevity defined as length of productive life.

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Section: Resultscontrasting

confidence: 95%

Section: Resultscontrasting

confidence: 82%

Section: Resultscontrasting

confidence: 64%

See 1 more Smart Citation

Lifetime Production and Longevity of Holstein Friesian Cows in Relation to Their Sire Transmitting Ability

Atil¹,

Khattab²

1998

Pakistan J. of Biological Sciences

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“…A similar situation exists in other countries (FREYER and ERHARDT 2000). Low heritability of longevity (h 2 =0.03-0.1) suggests that genetic improvement of this trait may be a slow process (ŻARNECKI et al 1997, SAWA 1998, MESZAROS et al 2008.…”

Section: Introductionsupporting

confidence: 53%

Effect of some factors on cow longevity

Sawa

Bogucki

2010

Arch. Anim. Breed.

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Abstract. Longevity (lifespan, length of productive life, number of calvings) was analysed in 25 231 cows that first calved in 1988 and 2000 in the Pomerania and Kujawy regions in Poland. GLM procedures of the SAS package were used in the statistical calculations. Longevity of cows that first calved in 2000 was found to improve in relation to that of cows that were first milked in 1988. The lifespan and length of productive life increased the most (by about 1 year) in herds of up to 20 cows, in herds with the lowest production level (by about 0.85 years), in herds of cows that first calved before 24 months of age up (by about 1 year) and in herds of cows that yielded 4 000–7 000 kg milk as first calvers (by about 0.5 years). Shortening the length of productive life in cows culled for low milk production (by 0.3 years) is probably one of the reasons for considerable production progress attained in cows in recent years. Age of cows at first calving and first lactation milk yield were significantly correlated to cow longevity.

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“…Abdel Glil (1991) with 1653 lactation records for daughters of 163 sires (each with 5 or more daughters) found that predicted sire values (BLUP) ranged from -466 to 681 kg. Also, Zarnecki et al (1990) found that the expected breeding values for 305 dMY ranged from -481 to 571 kg. In Egyptian buffaloes, Khattab and Mourad (1992) found that the estimation of sire transmitting ability for 305 dMY ranged from 147 kg to 154 kg.…”

Section: Resultsmentioning

confidence: 99%

A Comparison of Different Methods of Estimating Sire Transmitting Ability of Some Milk Traits in a Herd of Holstein Friesian

Atil¹,

Khattab²

1998

Pakistan J. of Biological Sciences

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A total of 1931 normal first lactation records of Holstein Friesian cows kept at Dena Farm in Egypt during the period from 1987 to 1994 were used to estimate phenotypic and genetic parameters for 90 and 305 day milk yield (dMY) and lactation period (LP). In addition, 76 bulls with at least ten daughters were used to compare three methods of sire transmitting ability. A least squares analysis of variance show significant effect of month and year of calving and age at first calving for different traits studied, except the effect of age at first calving on LP. Heritability estimates for 90 and 305 dMY and LP were 0.39±0.08, 0.27±0.07 and 0.14±0.05, respectively. Genetic and phenotypic correlations between different traits were positive and significant. Sires with at least ten daughters were evaluated by best linear unbiased prediction, least squares means and regression of the future daughters mean on the present daughters mean. The product moment correlations between different traits studied were positive and high (-0.96).

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Lifetime yield and herd life for crosses of Friesian strains in Poland

Cited by 8 publications

References 10 publications

Lifetime Production and Longevity of Holstein Friesian Cows in Relation to Their Sire Transmitting Ability

Lifetime Production and Longevity of Holstein Friesian Cows in Relation to Their Sire Transmitting Ability

Effect of some factors on cow longevity

A Comparison of Different Methods of Estimating Sire Transmitting Ability of Some Milk Traits in a Herd of Holstein Friesian

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