Breed and heterosis effects for milk yield traits at different production levels, lactation number and milking frequencies

Lembeye, F; López‐Villalobos, N.; Burke, J. L.; Davis, S. R.

doi:10.1080/00288233.2016.1156551

Cited by 12 publications

(10 citation statements)

References 16 publications

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“…Heterosis for MY, PY, and FY was significant for all combinations of breeds (Table 3) and ranged between 3.1 to 6.8%, which corresponds to previous findings by Lembeye et al (2016) and Bryant et al (2007). These figures also correspond well with heterosis estimates for MY, PY, and FY for crosses between Holstein and Jersey, Holstein and Ayrshire, and Ayrshire and Jersey presented in Lopez-Villalobos et al (2000).…”

Section: Short Communicationsupporting

confidence: 88%

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Short communication: Heterosis and breed effects for milk production and udder health traits in crosses between Danish Holstein, Danish Red, and Danish Jersey

Kargo

Clasen

Nielsen

et al. 2021

Journal of Dairy Science

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During the last decade, the use of systematic crossbreeding in dairy cattle herds has increased in several countries of the world. The aim of this study was to estimate the effect of breed proportion and heterosis on milk production traits and udder health traits in dairy cattle. The study was based on records on milk yield (MY), protein yield (PY), fat yield (FY), somatic cell score (SCS), and mastitis (MAST) from 73,695 first-lactation dairy cows in 130 Danish herds applying systematic crossbreeding programs. Around 45% of the cows were crosses between Danish Holstein (DH), Danish Red (DR), or Danish Jersey (DJ), and the remaining were purebred DH, DR, or DJ. The statistical model included the fixed effects of herd-year, calving month, and calving age and an effect representing the lactation status of the cow. In addition, the model included a regression on calving interval from first to second lactation, a regression on the proportion of DH, DR, and DJ genes, and a regression on the degree of heterozygosity between DH and DR, DH and DJ, and DR and DJ. Random effects were the genetic effect of the cow and a residual. The effect of breed proportions was estimated relatively to DH. For MY, a pure DR yielded 461 kg milk less than DH, whereas a pure DJ yielded 2,259 kg milk less than a pure DH. Compared with DH, PY was 41.7 kg less for DJ, whereas PY for DR was 4.0 kg less than for DH. For FY, a DR yielded 10.6 kg less than DH, whereas there was no significant effect of breed proportion between DJ and DH. A DR cow had lower SCS (0.13) than DH, whereas DJ had higher SCS (0.14) than DH. There was no significant effect of breed proportion on MAST between the 3 breeds. Heterosis was significant in all combinations of breeds for MY, FY, and PY. Heterosis for crosses between DH and DR was 257 kg (3.2%), 11.9 kg (3.2%), and 8.9 kg (3.2%) for MY, PY, and FY, respectively. Corresponding figures for crosses between DH and DJ were 314 kg (4.4%), 14.3 kg (4.4%), and 10.4 kg (4.0%), whereas heterosis between DR and DJ was 462 kg (6.7%), 19.6 kg (6.7%), and 13.9 kg (5.4%) for MY, PY, and FY, respectively. Heterosis was only significant for SCS in the crosses between DH and DR. Heterosis effects for MAST were nonsignificant for all the crosses. The results obtained in this study demonstrate that in first lactation cows, there is a positive effect of heterosis on milk production traits, but limited effect on udder health traits.

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Section: Short Communicationsupporting

confidence: 88%

“…On top of that, heterosis is added as a bonus. For milk production traits, heterosis effects range between 1.5 to 8.4% (Sørensen et al, 2008;Dechow et al, 2007;Lembeye et al, 2016). Heterosis is expected to be larger for functional traits than for production traits (Sørensen et al, 2008).…”

Section: Short Communicationmentioning

confidence: 99%

Short communication: Heterosis and breed effects for milk production and udder health traits in crosses between Danish Holstein, Danish Red, and Danish Jersey

Kargo

Clasen

Nielsen

et al. 2021

Journal of Dairy Science

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“…Based on their first-lactation production and results from previous studies (Macdonald et al, 2005;Lembeye et al, 2016), the mean 3-parity yields for the breed groups is less than what would be expected if only cows that had completed all 3 lactations were included. This reflects the fact approximately 34% of the 67,833 heifers in the current study for 3-parity yields failed to complete all 3 lactations.…”

Section: Discussionmentioning

confidence: 99%

Positive relationships between body weight of dairy heifers and their first-lactation and accumulated three-parity lactation production

Handcock

López‐Villalobos

McNaughton

et al. 2019

Journal of Dairy Science

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describes the effect that BW of replacement heifers has on accumulated milk yields without discriminating whether the increased milk yield came from greater survival or from greater production per surviving cow. Further research on the relationships between BW and survival of heifers is required to confirm whether the heavier heifers survived longer than the lighter heifers, but could explain why the relationship between BW and 3-parity milk yields was more curvilinear than the relationship between BW and firstlactation milk production. Holstein-Friesian heifers that were 450 kg in BW at 21 mo of age were estimated to produce 168 and 509 kg more ECM than 425-kg Holstein-Friesian heifers in first-lactation and 3-parity accumulated yields, respectively. A further increase in BW at 21 mo of age, from 450 to 475 kg, was estimated to result in 157 and 409 kg more ECM in firstlactation and 3-parity accumulated yields, respectively. Consequently, for heifers that were average and below average in BW, considerable milk production benefits would occur over the first 3 lactations by improving rearing practices to result in heavier heifers throughout the precalving phase.

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“…In cattle breeding, crossing has been used to take advantage of heterosis under a range of systems. In temperate systems, heterosis has been shown for fertility (Coffey et al, 2016), milk (Lembeye et al, 2016), and growth traits (Schiermiester et al, 2015). In the tropics, a variety of crossing strategies have been implemented with varying levels of success (reviewed in: Mcdowell, 1985; Cunningham and Syrstad, 1987).…”

Section: Introductionmentioning

confidence: 99%

Heterosis in cattle crossbreeding schemes in tropical regions: meta-analysis of effects of breed combination, trait type, and climate on level of heterosis1

Bunning

Wall

Chagunda

et al. 2018

Journal of Animal Science

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The aim of this study was to investigate the effects of animal trait, breed combination, and climate on the expressed levels of heterosis in crossbreeding schemes using tropical cattle. A meta-analysis of 42 studies was carried out with 518 heterosis estimates. In total, 62.5% of estimates were found to be significantly different from zero, the majority of which (89.8%) were beneficial for the studied trait. Trait and breed combination were shown to have a significant effect on the size of heterosis (P < 0.001 and P = 0.044, respectively). However, climate did not have a significant effect. Health, longevity, and milk production traits showed the highest heterosis (31.84 ± 10.73%, 35.13 ± 14.35%, and 35.15 ± 3.29%, respectively), whereas fertility, growth, and maternal traits showed moderate heterosis (12.02 ± 4.10%, 12.25 ± 2.69%, and 15.69 ± 3.26%, respectively). Crosses between breeds from different types showed moderate to high heterosis ranging from 9.95 ± 4.53% to 19.53 ± 3.62%, whereas crosses between breeds from the same type did not express heterosis that was significantly different from zero. These results show that heterosis has significant and favorable impact on productivity of cattle farming in tropical production systems, particularly in terms of fitness but also milk production traits.

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Breed and heterosis effects for milk yield traits at different production levels, lactation number and milking frequencies

Cited by 12 publications

References 16 publications

Short communication: Heterosis and breed effects for milk production and udder health traits in crosses between Danish Holstein, Danish Red, and Danish Jersey

Short communication: Heterosis and breed effects for milk production and udder health traits in crosses between Danish Holstein, Danish Red, and Danish Jersey

Positive relationships between body weight of dairy heifers and their first-lactation and accumulated three-parity lactation production

Heterosis in cattle crossbreeding schemes in tropical regions: meta-analysis of effects of breed combination, trait type, and climate on level of heterosis1

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