Genetic Characterization of Pelvic Measures in Beef Cattle: Heritabilities, Genetic Correlations and Breed Differences

Green, R. D.; Brinks, J. S.; LeFever, D.G.

doi:10.2527/jas1988.66112842x

Cited by 13 publications

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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%

“…Thus, if sires are selected based on increased pelvic measurements, a small positive genetic change for each trait in female offspring will be expected. Brinks ( 198 7 1 and Green et al (1988) concur that pelvic size will increase in females when produced by sires with larger pelvic measurements. However, these predicted increases are rather small especially if pelvic area is not the primary trait of interest in bull selection.…”

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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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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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show abstract

“…Heritability for pelvic size is moderate to high: In the Simmental (Benyshek and Little 1982) and other beef breeds (Morrison et al. 1986; Green et al. 1988), it is 0.43–0.59 for PH, 0.36–0.82 for PW and 0.53–0.68 for PA.…”

Section: Introductionmentioning

confidence: 99%

“…Selection towards an increase in PA is only feasible if there is a substantial variation for this trait within the DM-BB breed in combination with a moderate-to-high heritability for this trait. Heritability for pelvic size is moderate to high: In the Simmental (Benyshek and Little 1982) and other beef breeds (Morrison et al 1986;Green et al 1988), it is 0.43-0.59 for PH, 0.36-0.82 for PW and 0.53-0.68 for PA. In the Aberdeen Angus and Hereford breeds, Morrison et al (1986) showed that an increase in PA can be achieved without causing significant increase in cow size.…”

Section: Introductionmentioning

confidence: 99%

Pelvic Dimensions in Phenotypically Double‐muscled Belgian Blue cows

Kolkman

Hoflack

Aerts

et al. 2011

Reprod Domestic Animals

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Some anatomical characteristics of 507 Belgian Blue (BB) cattle, withers height (WH), heart girth (HG), the distance between the two tubera coxae (TcTc) and the distance between the two tubera ischiadica (TiTi), were compared with the internal pelvic measurements of width, height and area. Mean values were 58.9 ± 6.2 cm for TcTc, 14.6 ± 2.3 cm for TiTi, 15.2 ± 2.1 cm for pelvic width (PW), 18.8 ± 1.9 cm for pelvic height (PH) and 288.5 ± 60.9 cm(2) for pelvic area (PA). Cows that calved per vaginam had larger WH (p < 0.05), TcTc (p < 0.05) and TiTi (p < 0.001) and internal pelvic measurements [PH and PA (p < 0.001)] compared with those whose parturition was managed by caesarean section (CS): Correlations between internal pelvic measurements and TcTc were higher (r = 0.58-0.63) than TiTi (r = 0.22-0.28). Correlations between other external body measures such as HG and WH with the internal pelvic measurements were even higher for HG (r = 0.69-0.74) and for WH (r = 0.67-0.74). HG and WH, together with internal pelvic measures, may be added to estimated breeding values (EBV's) that should assist breeders in selecting cows that can calve per vaginam, thereby reducing the breed's dependence on elective CS for maintaining its unique characteristics.

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Genetic and phenotypic parameter estimates of pelvic measurements and birth weight in beef heifers

et al. 1994

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Genetic Characterization of Pelvic Measures in Beef Cattle: Heritabilities, Genetic Correlations and Breed Differences

Cited by 13 publications

References 0 publications

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

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

Pelvic Dimensions in Phenotypically Double‐muscled Belgian Blue cows

Genetic and phenotypic parameter estimates of pelvic measurements and birth weight in beef heifers

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