Sire Comparison for Holsteins in Mexico Versus the United States and Canada

McDowell, Robert; Wiggans, G.R.; Camoens, J. K.; Vleck, L.D. Van; Louis, D. G. St.

doi:10.3168/jds.s0022-0302(76)84198-7

Cited by 17 publications

(12 citation statements)

References 5 publications

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“…This was in contrast to observations of Abubakar et al (2). In agreement with some reports (6,16,17), a positive phenotypic correlation between milk yield and lactation length was obtained.…”

Section: Heritabilities and Correlationssupporting

confidence: 81%

“…In this study, actual records were used because information was inadequate for derivation of acceptable factors (24). Heritability estimated in this study was higher than estimates by McDowell et al (16) and Camoens et al (6) where negative sire components of variance were obtained with Mexico and Puerto Rico data. High estimates also have been obtained by others (2,17,20).…”

Section: Heritabilities and Correlationscontrasting

confidence: 53%

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Genetic Evaluation of Holsteins in Columbia

Abubakar

McDowell

Vleck

1986

Journal of Dairy Science

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Original data consisted of 31,777 records of progeny of 1442 sires for calvings between 1975 and 1983. Unadjusted means for milk yield (kg), days in milk, days dry, calving interval, days carried calf, and age at calving were 4281, 267, 88, 421, 145, and 36.6. Estimated total variance for first lactation milk yield by Henderson's method 3 was 1,385,436 kg 2 with sire and error variances accounting for 1.8 and 98.2%. Heritabilities for milk yield, lactation length, age at calving, and days carried calf were .07, .06, 2.59, and .01. High estimate for age was attributed to confounding of sires with season of calving. Genetic and phenotypic correlations between traits were milk and lactation length, .76 and .72; milk and age at calving, .17 and -.04; milk and days carried calf, -2.11 and .13; lactation length and age at calving, -.13 and -.06; lactation length and days carried calf, .87 and 16.; age at calving and days carried calf, -.60 and -.03. Sires with at least 10 daughters were evaluated by best linear unbiased prediction procedures. First lactation sire values for milk ranged from 359 to -340 kg with an average difference between sires of 12 kg. Sire values using all lactations ranged from 505 to -286 kg with an average difference between sires of 13 kg. Rank correlation between all and first lactation evaluations was .77.

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Section: Heritabilities and Correlationssupporting

confidence: 81%

Section: Heritabilities and Correlationscontrasting

confidence: 53%

Genetic Evaluation of Holsteins in Columbia

Abubakar

McDowell

Vleck

1986

Journal of Dairy Science

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“…The estimated genetic correlation, rA =0.08 & 0.35, for milk yield (Table 3) seems to be the lowest estimate ever reported between local and exotic environments (Petersen, 1975;McDowell et al, 1976;Cunningham 8: O'Byme, 1977). It should be noted that the standard errors of the parameter estimates involving Sri Lanka data are rather high due to the small progeny group size Downloaded by [University of California Santa Barbara] at 09:30 14 June 2016 Geiiot~pe-enciroiiiie~it interactioiz iii milk proditctioti 37 1 and the limited number of sires.…”

Section: Resultsmentioning

confidence: 76%

Genotype-Environment Interaction in Milk Production under Sri Lanka and Danish Conditions

Buvanendran

Petersen²

1980

Acta Agriculturae Scandinavica

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“…Least squares means for lactation milk yield were 6897 kg and 6761 kg (P<0.05) for cows from Italy and those born in Turkey, respectively. Studies in Mexico (McDowell et al, 1976b), Jordan (Lafi et al, 1995), Egypt (Farghaly et al, 1997), and the Czech Republic (Stadnik and Louda, 1999) also showed that imported HolsteinFriesians produced more milk than local HolsteinFriesians. Milk yield for cows from Italy was lower than that for Holstein-Friesian cows in Italy in 1993, which was 7421 kg (ANAFI, 2002), but it was higher than that for Holsteins in Sicily, which was 5799 kg (Licitra et al, 1998), where the environmental conditions are more similar to those in the western part of the Aegean Region.…”

Section: Resultsmentioning

confidence: 99%

Comparative analysis of milk yield and reproductive traits of Holstein-Friesian cows born in Turkey or imported from Italy and kept on farms under the Turkish-ANAFI project

Kaya

Uzmay

Kaya

et al. 2003

Italian Journal of Animal Science

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This research investigated the milk yield, reproductive traits and productive life of Holstein-Friesian cows born in Turkey or imported from Italy and raised on farms involved in the Turkish-ANAFI Project. A total of 2600 records for age at first calving, 4733 completed lactation records from 2080 cows, and 1130 productive life (from first calving to disposal) records from 50 farms in the provinces of I • zmir, Manisa and Aydın under the Turkish-ANAFI Project were evaluated. Least squares means for age at first calving, 305-day milk yield, lactation milk yield, lactation duration, days open, days dry, and productive life were 28.2 months, 6232 kg, 6829 kg, 336.0 days, 138.0 days, 78.3 days, and 28.9 months, respectively. Corresponding least squares means for cows born in Turkey and imported from Italy were 28.8 and 27.6 months (P<0.01), 6182 and 6281 kg (P>0.05), 6761 and 6897 kg (P<0.05), 333.9 and 338.1 days (P<0.05), 132.7 and 143.4 days (P<0.01), 79.2 and 77.3 days (P>0.10), and 21.6 and 36.1 months (P<0.01), respectively. The level of milk yield of Holstein-Friesian cows in herd-book herds under the project in the Aegean Region was satisfactory. However, there were reproductive problems as shown by the length of days open. Shorter productive life of cows born in Turkey compared to cows from Italy suggested that breeders tended to cull locally born cows at a younger age but that they tended to keep imported cows in the herd for a longer period unless serious problems occurred.

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Sire Comparison for Holsteins in Mexico Versus the United States and Canada

Cited by 17 publications

References 5 publications

Genetic Evaluation of Holsteins in Columbia

Genetic Evaluation of Holsteins in Columbia

Genotype-Environment Interaction in Milk Production under Sri Lanka and Danish Conditions

Comparative analysis of milk yield and reproductive traits of Holstein-Friesian cows born in Turkey or imported from Italy and kept on farms under the Turkish-ANAFI project

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