The Influence of Dam Weight, Body Condition and Udder Scores on Calf Birth Weight and Preweaning Growth Rates in Beef Cattle

Paputungan, Umar; Makarechian, M.

doi:10.5713/ajas.2000.435

Cited by 9 publications

(11 citation statements)

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“…Consequently, mastitis can result in an average 9.6 to 19 kg reduction in WW (Haggard et al, 1983; Watts et al, 1986; Newman et al, 1991). Teat and udder structure also impact calves’ ability to suckle, as pendulous udders and large bottle-shaped teats are more difficult to find and suckle (Bunter and Johnston, 2014), whereas well-attached udders and moderate teats were associated with better calf performance (Paputungan and Makarechian, 2000; Goonewardene et al, 2003). In another study (Smith et al, 2017), calf performance was greatest from dams with moderate teat and udder scores.…”

Section: Resultsmentioning

confidence: 99%

Development of optimal genetic evaluations for teat and udder structure in Canadian Angus cattle

Devani

Valente

Crowley

et al. 2019

Journal of Animal Science

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Despite their heritability and influence on female productivity, there are currently no genetic evaluations for teat and udder structure in Canadian Angus cattle. The objective of this study was to develop optimal genetic evaluations for these traits in the Canadian Angus population. Guidelines recommended by Beef Improvement Federation (BIF) were used to score teat and udder structure in 1,735 Canadian Angus cows from 10 representative herds. Cows scored ranged in parity from 1 to 13; however, >70% of cows were parity ≤4. Scores ranged from 1 (large, bottle shaped) to 9 (very small) for teats and from 1 (very pendulous) to 9 (very tight) for udders. Consistent with parity distribution, >70% of teat and udder scores were ≥6. Teat and udder scores (TS9 and US9, respectively) were modeled using a multiple trait animal model with random effects of contemporary group (herd-year-season) and additive genetic effect, and fixed effects of breed, parity group, and days between calving and scoring. To test good versus poor structure, a binary classification of 1 or 2 (TS2, US2) [comprised of scores 1 to 5 = 1 (poor structure) and scores 6 to 9 = 2 (good structure)] was created. Further, to assess the impact of grouping less frequently observed poor scores, a 1 to 7 scale (TS7, US7) was created by combining teat and udder scores 1 to 3. Analyses for teat and udder scores on scales TS9, US9, TS7, US7, and TS2, US2 were compared. In addition, both threshold and linear animal models were used to estimate variance components for the traits. Data treatment and models were evaluated based on correlation of resulting estimated breeding value (EBV) with corrected phenotypes, Spearman’s rank correlation coefficient, average EBV accuracies (r), and deviance information criteria (DIC). TS9, US9 scales for teat and udder scores and linear models performed best. Estimates of heritability (SE) for teat and udder score were 0.32 (0.06) and 0.15 (0.04), respectively, indicating these traits were moderately heritable and that genetic improvement for teat and udder scores was possible. Estimates of phenotypic and genotypic correlations for teat and udder score were 0.46 (0.02) and 0.71 (0.09), respectively. Estimates of genotypic correlations with birth weight (BW), weaning weight (WW), and yearling weight (YW), ranged from −0.04 (0.10) to −0.20 (0.12), verifying the importance of selecting for improved teat and udder score as individual traits, alongside performance traits.

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Section: Resultsmentioning

confidence: 99%

Development of optimal genetic evaluations for teat and udder structure in Canadian Angus cattle

Devani

Valente

Crowley

et al. 2019

Journal of Animal Science

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“…Other enriched QTLs for SC included udder depth, udder attachment, teat placement-rear, and udder cleft ( Table 2; Table S5). Cows with tightly attached udders and proper teats tend to remain in a herd longer, are easier to nurse, and less susceptible to mastitis, therefore udder traits may be used in conjunction with body conformation traits for the indirect selection of longevity in beef cattle 73,74 . The QTL enrichment analysis for SM also revealed QTLs related to fertility on BTA9, one for daughter pregnancy rate and two different QTLs for interval to first estrus after calving (Table 2; Table S5).…”

Section: Discussionmentioning

confidence: 99%

Genome-wide association study to identify genomic regions and positional candidate genes associated with male fertility in beef cattle

Sweett

Fonseca

Suárez-Vega

et al. 2020

Sci Rep

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Fertility plays a key role in the success of calf production, but there is evidence that reproductive efficiency in beef cattle has decreased during the past half-century worldwide. Therefore, identifying animals with superior fertility could significantly impact cow-calf production efficiency. The objective of this research was to identify candidate regions affecting bull fertility in beef cattle and positional candidate genes annotated within these regions. A GWAS using a weighted single-step genomic BLUP approach was performed on 265 crossbred beef bulls to identify markers associated with scrotal circumference (SC) and sperm motility (SM). Eight windows containing 32 positional candidate genes and five windows containing 28 positional candidate genes explained more than 1% of the genetic variance for SC and SM, respectively. These windows were selected to perform gene annotation, QTL enrichment, and functional analyses. Functional candidate gene prioritization analysis revealed 14 prioritized candidate genes for SC of which MAP3K1 and VIP were previously found to play roles in male fertility. A different set of 14 prioritized genes were identified for SM and five were previously identified as regulators of male fertility (SOD2, TCP1, PACRG, SPEF2, PRLR). Significant enrichment results were identified for fertility and body conformation QTLs within the candidate windows. Gene ontology enrichment analysis including biological processes, molecular functions, and cellular components revealed significant GO terms associated with male fertility. The identification of these regions contributes to a better understanding of fertility associated traits and facilitates the discovery of positional candidate genes for future investigation of causal mutations and their implications.

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“…The result was consistent with the findings of Ciccioli et al (2003), who observed that calf birth weight was not affected by BCS at calving. The effect of body condition score of dam on calf birth weight was not significant in beef cows Paputungan and Makarechian (2000). However, Spitzer et al (1995) while working with primiparous beef cows observed influence of body condition score of cows at parturition on birth weight of calves.…”

Section: Resultsmentioning

confidence: 81%

Effect of Body Condition Score on Performance Traits in Crossbred Dairy Cows

Singh

Dutt

Joshi

et al. 2009

Journal of Applied Animal Research

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Sixty crossbred cows from three different genetic groups (1 12 Holstein Friesian (F) x 1 / 2 Hariana (H), 1 /2F x l 14 Brown Swiss x 1 f 4 H), (1 f 2Fx1 f 4 Jersey x 1 f 4 H) were randomly selected to study body condition score after calving and its association with performance traits. The correlations between body condition score and body weight at different stages of lactation were positively significant. The correlations between body condition score and peak yield were negative and significant at 42nd (-0.316) and 56th (-0.404) day of lactation. The effect of body condition score on other performance traits was found to be non-significant. It is concluded that high producing cows mobilize greater amount of body condition score than the low producing cows in early lactation.

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The Influence of Dam Weight, Body Condition and Udder Scores on Calf Birth Weight and Preweaning Growth Rates in Beef Cattle

Cited by 9 publications

References 0 publications

Development of optimal genetic evaluations for teat and udder structure in Canadian Angus cattle

Development of optimal genetic evaluations for teat and udder structure in Canadian Angus cattle

Genome-wide association study to identify genomic regions and positional candidate genes associated with male fertility in beef cattle

Effect of Body Condition Score on Performance Traits in Crossbred Dairy Cows

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