Estimates of Heritabilities and Correlations of Traits Associated with Pelvic Area in Beef Cattle

Morrison, D. G.; Williamson, W. D.; Humes, P. E.

doi:10.2527/jas1986.632432x

Cited by 35 publications

(38 citation statements)

References 12 publications

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“…A considerable increase of the measures between the nuliparous and multiparous groups was observed (Barreto et al, 2004), and, according to the information obtained, the multiparous females did not have difficulties of parturition, ratifying the observations of Morrison et al (1986) and Johnson et al (1988), where carried out for the evaluation of the pelvic measures relating to the difficulty of parturition, concluded that females with a greater pelvic area would benefit the replacement of others in the group and that the most significant variable was the weight of the calf at birth, indicating that a selection process should include the follow-up of the pelvic measure to diminish the difficulty of parturition.…”

Section: Resultsmentioning

confidence: 65%

Relação entre medidas pélvicas e condições tocológicas de fêmeas bovinas da raça Girolanda

Barreto

Santos

Wischral

et al. 2008

Agraria

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External and internal in vivo pelvic measurements were carried out in 110 Girolanda bovine females, using a tape measure, Hauptner pelvimeter and a Menissier-Vissac pelvimeter. Results were confronted with body biometric data and correlations were established between pelvic measurements and tocological conditions of each animal distributed into three groups (nuliparous, primiparous and multiparous) according to the occurrence and the number of parturitions. The variables corresponding to the general body measurements and to the external and internal measurements showed significant positive correlation (p= 0.0001) when individually confronted with each other. There was a positive correlation between mean external and internal pelvic diameters. The pelvic external variables were positively correlated with body measurements, but most of them were below 0.5 (p= 0.0001). The internal variables showed low correlations with height, length and thoracic perimeter and medium correlation with age and weight, except for the sacropubic with thoracic perimeter, coith which there was no significant correlation. It was concluded that pelvic measurements are correlated with body measurements and that they are influenced by the reproductive stage. Key words: biometry, bovine, pelvimetry, reproductionRelação entre medidas pélvicas e condições tocológicas de fêmeas bovinas da raça Girolanda R e s u m oMensurações pélvicas externas e internas foram realizadas em 110 fêmeas bovinas da raça Girolanda mediante a utilização de trena padrão, pelvímetro Hauptner e pelvímetro Menissier-Vissac. Os resultados foram confrontados com os dados biométricos corpóreos e estabelecidas correlações entre as medidas pélvicas e as condições tocológicas de cada animal, segundo a distribuição em três grupos, cuja referência foi a ocorrência e o número de partos (nulíparas, primíparas e multíparas). Existiu correlação positiva média dos diâmetros pélvicos externos com os internos. As variáveis externas da pelvis tiveram correlação positiva com as medidas corpóreas, porém a maioria esteve abaixo de 0,5 (p=0,0001). As variáveis internas apresentaram baixas correlações com

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Section: Resultsmentioning

confidence: 65%

Relação entre medidas pélvicas e condições tocológicas de fêmeas bovinas da raça Girolanda

Barreto

Santos

Wischral

et al. 2008

Agraria

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“…Most previous research has found higher heritability estimates for these traits. Heritability estimates in the literature ranged from .49 to .99 for pelvic width, .43 to 1.01 for pelvic height, and .46 to .97 for pelvic area (Benyshek and Little, 1982;Morrison et al, 1986;Nelson et al, 1986;Green et al, 1988;Naazie et al, 1991). However, Neville and coworkers (1978) using four breeds of cattle at two locations reported heritability estimates of .18 and .22 for pelvic width, .10 and .38 for pelvic height, and .04 and .24 for pelvic area.…”

Section: Resultsmentioning

confidence: 99%

“…Benyshek and Little (1982) reported a genetic correlation of .65 between 365-d pelvic area and weight but only a small environmental correlation. Morrison et al (1986) reported a small phenotypic correlation between pelvic area and mature cow weight. Table 6 contains estimates of additive genetic (co)variances and environmental variances for pelvic traits of males and actual calving ease scores of females.…”

Section: Resultsmentioning

confidence: 99%

“…72:1954-1963 dam. Studies examining yearling female pelvic width, height, and area have indicated moderate to high heritability estimates for these traits (Benyshek and Little, 1982;Morrison et al, 1986;Green et al, 1988;and Anderson et al, 1991). Naazie et al (1991) reported favorable negative genetic correlations between calving ease scores in 2-yr-old heifers and pelvic width, height, and area measured in the heifers 6 mo later.…”

Section: Introductionmentioning

confidence: 99%

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Estimates of genetic parameters for 320-day pelvic measurements of males and females and calving ease of 2-year-old females

Kriese

Vleck²,

Gregory³

et al. 1994

Journal of Animal Science

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ABSTRACT:Records from 12 breed groups collected from 1983 to 1991, included in the Germ Plasm Utilization project at the U.S. Meat Animal Research Center, were analyzed separately by breed group and combined to estimate heritabilities and genetic correlations for 320-d male and female pelvic width, height, and area, and for 320-d male pelvic and female 2-yr-old calving ease. Calving ease was analyzed as a trait of the dam using 1) actual and 2 ) binary scale calving ease scores with a covariate of calf birth weight. A bivariate animal model and derivative-free REML incorporating sparse matrix techniques were used. When breed groups were analyzed separately, heritability estimates of male and female 320-d pelvic traits varied by breed group and sex. Average genetic correlations between male and female 320-d pelvic width, pelvic height, and pelvic area were large and positive. When breed groups were combined ( n = 26,071), heritability estimates for 320-d pelvic traits were moderate in size. Genetic correlations of .68, .48, and .61, between male and female 320-d pelvic width, height, and area, respectively, suggest male and female pelvic traits are largely under the same genetic control but are correlated traits rather than the same trait. Heritability estimates for actual calving ease in 2-yr-olds ranged from .OO to .49 in separate breed group analyses, and from .OO to .37 for binary measures. When breed groups were combined, heritability was .ll for actual calving ease and was .09 on the binary scale. Genetic correlations by breed groups between 320-d male pelvic traits and calving ease of 2-yr-old females were variable. When breed groups were combined, genetic correlation estimates between 320-d male pelvic traits and actual calving ease of 2-yr-old females (on a 6-point scale) were negative and moderate as were genetic correlations between male 320-d pelvic traits and binary calving ease of 2-yr-old females. A bull one phenotypic SD above the mean in pelvic area would be expected to increase his daughters' average pelvic area by 1.30 cm2 and improve its calving ease score by .03 of a score compared with an average breed bull.

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“…After removal from the rectum, the instrument was thoroughly cleaned with a mild disinfectant solution before using it in another ewe. The pelvic area (PA) of each animal was calculated as π (PH/2)*(PW/2) (Morrison et al, 1986).…”

Section: Methodsmentioning

confidence: 99%

Relationship between pelvic and linear body measurements in Dorper ewes

Rooyen¹,

Fourie²,

Schwalbach³

2012

SA J. An. Sci.

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Low lifetime rearing success and high perinatal mortality of lambs have been associated with small pelvic areas in ewes. It would therefore make sense to include pelvic area as a criterium for selecting breeding ewes; however, measuring it in vivo poses some challenges. The aim of this study was to determine pelvic height, width and area and to estimate correlations between these measurements and other external linear body parameters, i.e. body height, shoulder height, chest depth, front quarter width, hindquarter width, rump length and rump slope in Dorper ewes. A total of 332 young Dorper ewes (± 12 months old; 48.0 ± 5.9 kg) were used. The overall mean pelvic area of yearling Dorper ewes was 35.4 ± 4.9 cm 2 . Registered ewes recorded significantly larger pelvic areas (37.4 ± 4.3 cm 2 ) than commercial ewes (33.9 ± 3.8 cm 2 ). Results also indicate no correlations between pelvic measurements and other body measurements considered in this study, indicating the need to measure the pelvic area of ewes directly. The pelvic meter and techniques used in this study proved to be relatively easy to use in measuring the pelvises of sheep.

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Estimates of Heritabilities and Correlations of Traits Associated with Pelvic Area in Beef Cattle

Cited by 35 publications

References 12 publications

Relação entre medidas pélvicas e condições tocológicas de fêmeas bovinas da raça Girolanda

Relação entre medidas pélvicas e condições tocológicas de fêmeas bovinas da raça Girolanda

Estimates of genetic parameters for 320-day pelvic measurements of males and females and calving ease of 2-year-old females

Relationship between pelvic and linear body measurements in Dorper ewes

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