Sire effects on antibodies to nematode parasites in grazing dairy cows

Morris, C. A.; Cullen, N. G.; Green, R.S.; Hickey, S. M.

doi:10.1080/00288233.2002.9513508

Cited by 8 publications

(9 citation statements)

References 21 publications

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“…The Abs were also highly correlated amongst themselves, as also reported by Agneessens et al (2000) in a Belgian study, with a high correlation (R = 0.72) between Abs to adult Cooperia and Ostertagia species, and by Morris et al (2002) in a New Zealand study with grazing dairy cows, where four of the same six Abs as in the present study had a similar high correlation (averageR = 0.81). Bissetetal.…”

Section: Studysupporting

confidence: 80%

“…One method may be the genetic approach, utilising the natural ability of some animals to resist high levels of parasitic infection or their effects. Heritable differences in parasite-related traits have been reported in New Zealand, both in dairy cattle (Morris et al 2002) and in beef cattle (Morris et al 2003), in all stock classes studied so far. These include: faecal egg count (FEC) in beef calves at 7-10 months of age, and anti-nematode antibody (Ab) concentrations in four stock classes, beef calves, yearling beef heifers, peri-parturient beef cows, and mid-lactation mixed-age dairy cows.…”

Section: Introductionmentioning

confidence: 95%

“…Furthermore, it has been shown that under some circumstances significant losses in milk production can occur as a result of subclinical parasitism in mixed-age dairy cows (Bisset et al 1987a,b). Studies of nematode parasitism in dairy cows in New Zealand (Bisset et al 1987b;Morris et al 2002) and Canada (Guitian et al 1999) have shown considerable variation in the levels of parasitism from herd to herd, or variable responses from herd to herd following treatment with effective anthelmintic.…”

Section: Introductionmentioning

confidence: 99%

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Relationships among faecal egg counts, anti‐parasite antibodies and milk yields in an experimental Friesian herd

Morris

Green

Hickey

et al. 2004

New Zealand Journal of Agricultural Research

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Two studies were carried out to measure variation in faecal nematode egg count (FEC) or serum anti-nematode antibody (Ab) concentration in Friesian cattle, and correlations between these traits and subsequent milk yield traits. In Study 1, FEC and Abs were measured in 9-month-old calves and 21-month-old heifers (1996 and 1995 calf crops, respectively), and correlations with the subsequent first-lactation yield traits were estimated in herds calving in late winter (July/August). In Study 2, Abs were measured in mixed-age cows during lactation in each of four groups (summer, autumn, winter, and spring calving mobs), and correlations were *Present address: estimated between Abs and yield in the current lactation. In Study 1, concentrations of the six different Abs (adult and/or third larval stages of four nematode parasite species) were moderately correlated with each other (average correlations of 0.57 in calves and 0.65 in heifers). In Study 2 the average correlation among Abs was 0.74. In Study 1, the average FEC values were 142 and 56 eggs/g in April and June samples collected from calves, and 14 and 28 eggs/g from heifers. Repeatability of FEC over time was moderate in the calves (0.45), but much lower in the heifers (0.13). Correlations between FEC and Ab were low but favourable in sign, averaging -0.24 in calves and -0.12 in heifers, while those between FEC as a juvenile and first-lactation milk or milk-component yields were close to zero, averaging -0.05 for calves and -0.02 for heifers. Correlations between Abs to Cooperia oncophora or Ostertagia L3 antigens and milk or milk-component yields averaged 0.23 and 0.07, for the two age groups in Study 1, respectively, and 0.06 in Study 2. Correlations between these Abs and liveweight averaged 0.14 for calves and 0.17 for heifers. It is concluded that, under the routine herd management conditions applied, concentrations among all Abs studied were consistently correlated, FEC was repeatable in calves, and those calves with a higher Ab response to Cooperia oncophora or Ostertagia L3 antigens tended to show slightly higher first-lactation yields.

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Section: Studysupporting

confidence: 80%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

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Relationships among faecal egg counts, anti‐parasite antibodies and milk yields in an experimental Friesian herd

Morris

Green

Hickey

et al. 2004

New Zealand Journal of Agricultural Research

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“…Vanimisetti et al (2004) reported 0.10 and 0.19 h 2 in lambs of 50% Dorset, 25% Rambouillet and 25% Finnsheep ancestry and 0.31 h 2 in ewes of same sheep. Higher estimates were reported by Morris et al (2000) in Romney sheep (0.29±0.02 to 0.36±0.02), Bishop and Stear (2001) in Scottish Blackface sheep (0.23±0.05), Woolaston and Windon (2001) in Merino sheep (0.21±0.06 to 0.38±0.04) and McEwan et al (1995), Douch et al (1995), Morris et al (2002) in New Zealand sheep breeds (0.20± 0.07 to 0.42±0.10). Addition of maternal genetic effect reduced the h 2 estimates by 24.8% in model 2.…”

Section: Genetic Studiesmentioning

confidence: 59%

Estimates of genetic parameters for faecal egg count of Haemonchus contortus infection and relationship with growth traits in Avikalin sheep

Prince

Gowane

Swarnkar

et al. 2009

Trop Anim Health Prod

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Genetic parameters for faecal egg count were estimated in naturally challenged Avikalin sheep developed and maintained at Central Sheep & Wool Research Institute, Avikanagar, India, over a period of 4 years (2004-2007). The data on faecal egg count for 433 animals descended from 41 sires, and 151 dams were used for the study. Genetic analyses were carried out using restricted maximum likelihood, fitting an animal model and ignoring or including maternal genetic or permanent environmental effects. Direct heritability for the trait was 0.149 +/- 0.096 when maternal effects were ignored. In the model which takes in to account direct genetic, maternal genetic and maternal permanent environment effect together, it was observed that maternal heritability (m(2)) accounts for 0.6% of total variation whereas maternal permanent environmental effect (c(2)) accounts for 6.14% of total phenotypic variation. Effect of faecal egg count on the growth characteristics was observed to be significant. It was seen that wherever FEC was high, body weight or average daily gain declined in active infective stage. After termination of the infection, these effects were found to be non-significant. Result suggests that direct genetic and maternal permanent environmental effects were important for this trait; thus, they need to be considered for improvement in the trait.

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“…This β-casein study was part of a larger project carried out with milk from 21 large dairy herds in the upper North Island of New Zealand, described earlier by Morris et al (2002). The average herd size in the main project was about 750 cows, over three times the national average at the time.…”

Section: Trial Designmentioning

confidence: 99%

Associations between β‐casein genotype and milk yield and composition in grazing dairy cows

Morris

Hickey

Cullen

et al. 2005

New Zealand Journal of Agricultural Research

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Milk samples from New Zealand dairy cows at pasture were analysed to investigate the relationship between β-casein genotype and milk yield or composition traits. A total of 1661 milk samples from 21 North Island herds were analysed from individual cows in mid lactation, from a routine herd-test taken between mid November 2000 and early February 2001. The cows, whose ages ranged from 2 to 11 years, were the daughters of 11 widely used Holstein-Friesian bulls. The β-casein genotypes of the sires (A 1 or A 2 alleles)were: A 1 A 1 (n = 1), A 1 A 2 (n = 7) and A 2 A 2 (n = 3). The milk composition traits analysed were: protein%, fat%, somatic cell count (SCC), β-casein%, κ-casein%, β-lactoglobulin%, lactoferrin%, and fatty acid composition (C4-C24, including conjugated linoleic acid). Milk yield per day, fat colour (optical density measurement), milkfat melting point, and an index of milk value in dollars (combining the industry's economic values for milk yield, fat yield, and protein yield) were also analysed. Sire effects were significant for most of the traits. Linear contrasts were calculated between β-casein genotypes on a pooled within-sire basis for each trait. Expressing results relative to the mean of all samples analysed, there was a significant increase of 2.8% (±1.2%) in the daily fat yield of A 2 A 2 over A 1 A 2 genotype cows (P < 0.05), and the data suggested an increase (P < 0.10) in daily protein yield (a 2.2% margin of A 2 A 2 over A 1 A 1 genotypes, and a 1.9% margin of A 2 A 2 over A 1 A 2 genotypes). Milk solids yield was affected in a similar way to milk protein and milk fat yields. Milk value per day was significantly increased by 2.0% (±1.0%) in A 2 A 2 cows over A 1 A 2 cows (P < 0.05). β-casein% and κ-casein% were significantly lower in A 2 A 2 than A 1 A 1 genotypes, by 4.3% (±1.0%) (P < 0.001) and 4.5% (±2.0%) (P < 0.05) of their respective mean concentrations, with values in the A 1 A 2 genotype being intermediate and significantly greater than in the A 2 A 2 genotype (P< 0.05) for both β-casein% and κ-casein%. There was a lower percentage of medium-chain fatty acids and a corresponding increase in long-chain mono-unsaturated fatty acids in the milk of A 2 A 2 than of A 1 A 1 cows (P < 0.05), whilst milk from A 1 A 2 and A 2 A 2 cows was similar in this respect. There was a significantly higher SCC (P < 0.05) for the A 1 A 2 than the A 1 A 1 genotypes, but the percentage of cows whose milk exceeded an SCC of 400 000 cells/ml was not significantly affected by β-casein genotype. No other measured differences were significant. Overall, the milk value per day from A 2 A 2 cows was worth 2.1 % more (±0.95%) than that from A 1 A 1 and A 1 A 2 cows together (P < 0.05). Using economic values in the Breeding Worth formula for the 2004 year, this advantage was equivalent to $15.8 per lactation or $4,740 in a herd of 300 cows.

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Sire effects on antibodies to nematode parasites in grazing dairy cows

Cited by 8 publications

References 21 publications

Relationships among faecal egg counts, anti‐parasite antibodies and milk yields in an experimental Friesian herd

Relationships among faecal egg counts, anti‐parasite antibodies and milk yields in an experimental Friesian herd

Estimates of genetic parameters for faecal egg count of Haemonchus contortus infection and relationship with growth traits in Avikalin sheep

Associations between β‐casein genotype and milk yield and composition in grazing dairy cows

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