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

Glaze, J.B.; Vogt, D. W.; Lipsey, R.J.; Ellersieck, Mark R.

doi:10.1016/0093-691x(94)90509-h

Cited by 6 publications

(5 citation statements)

References 13 publications

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“…Focusing on females between 24 months (first parity) and 48 months (third parity and mature) and males between 18 and 24 months (slaughtering age) the development of separate models for males and females should be considered. Gender significantly influences pelvic sizes (this study) and age influences variation of the pelvic size (this study; Glaze et al, 1994). When measuring TcTc, a clear distinction must be made.…”

Section: Discussionmentioning

confidence: 93%

Estimating internal pelvic sizes using external body measurements in the double-muscled Belgian Blue beef breed

et al. 2003

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In the double-muscled (DM) Belgian Blue beef (BBB) breed, caesarean section (CS) is being applied systematically as a management tool to prevent dystocia. As a matter of fact, CS is the only possible way of calving in the breed. High birth weight and a relatively small pelvic area are the main causes of dystocia and, in the DM-BBB breed, the reasons for the systematically applied CS. Selection for lower birth weight and larger pelvic sizes might reduce dystocia and routine CS. Few data on inner pelvic sizes of pedigree animals are available. Using external measurements to estimate the inner pelvic sizes might be an option to resolve this problem. In this study, animals of the DM-BBB breed were measured and weighed on farms and in abattoirs. External and internal pelvic sizes increased with live weight and age of the animals. Gender had a significant influence on inner pelvic traits. Increased muscular conformation was associated with decreased inner pelvic dimensions. Models with weight, gender, age, withers height and outer pelvic width (TcTc) can be used to estimate inner pelvic sizes ( R 2 between 0·35 and 0·77). The estimated inner pelvic sizes can then be used to genetically evaluate pelvic traits in the DM-BBB breed. Improving weight, withers height and TcTc width in combination with lowering muscular conformation may help to decrease the high rate of caesarean section in the DM-BBB.

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Section: Discussionmentioning

confidence: 93%

Estimating internal pelvic sizes using external body measurements in the double-muscled Belgian Blue beef breed

et al. 2003

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“…1993), as do the body conformation traits and weight at birth (Table 3; Anderson et al. 1993; Glaze et al. 1994; Arthur et al.…”

Section: Discussionmentioning

confidence: 99%

“…Although Burfening et al (1978) and Hanset (1981) prefer selection using calving ease scores, selection for less dystocia and fewer CSs in the DM-BBB can only be performed by increasing internal pelvic sizes of the dam and by lowering the weight and/or size of the newborn calf. Internal pelvic sizes have a high heritability (Morrison et al 1986;Anderson et al 1993), as do the body conformation traits and weight at birth (Table 3; Anderson et al 1993;Glaze et al 1994;Arthur et al 1997), making this approach possible.…”

Section: Discussionmentioning

confidence: 99%

Comparison of external morphological traits of newborns to inner morphological traits of the dam in the double‐muscled Belgian Blue Beef breed

Coopman

Gengler

Groen

et al. 2004

J Animal Breeding Genetics

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In the double-muscled (DM) Belgian Blue Beef (BBB) breed, caesarean section (CS) is used as a routine management tool to prevent dystocia. This practice is criticized on animal welfare grounds. With unassisted (natural) births, difficulties arise because of disproportion between the sizes of the newborn and inner pelvic sizes of the dam. In this study external morphological traits of newborns are compared with inner morphological traits of the dam. Results of this study indicate that in the DM-BBB, CS is the only means to successful calving. Therefore, no calving ease scores are available to select for less dystocia in this breed. Selection for fewer CS must be achieved by focusing on lower birth weight (BW) and decreased muscular conformation at birth, both having a sufficiently high heritability. Simultaneously, pelvic sizes of the dam should be increased. It is very likely that the look of the DM-BBB will change when selecting for less dystocia

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“…The pelvic dimensions were reported to be highly heritable traits (h 2 , 0.15–0.68; Morrison et al, 1986; Glaze et al, 1994), and cattle breeders had preference for cows of higher pelvimetric values to circumvent incidences of dystocia. Higher pelvic dimensions had some better roles to play in cows to avoid parturition difficulties.…”

Section: Discussionmentioning

confidence: 99%

Association of linear type pelvic traits with testicular characteristics and reproductive capability of breeding dairy bulls

Mandal

Kumar

Tyagi

2022

Reprod Domestic Animals

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Associations of pelvic linear type traits (PLT) on production and reproduction of cows were widely documented; in contrast, importance of PLT on bulls’ reproductive ability, semen quality, semen cryo‐preservability, frozen semen doses (FSD) production etc. was inadequately reported. The present study was conducted on Frieswal bulls (N = 378, age: 6–91 months, m) to assess age‐wise growth dynamics of pelvic dimensions, classifying age into 6 groups (6 m, 7–12 m, 13–24 m, 25–36 m, 37–48 m, >48 m). Iso‐age group bulls’ (N = 100; 25–36 m) records were analysed after classifying seasons (summer/rainy/winter) of semen collection, if pelvic morphometric traits had any practical associations with testicular traits, semen quality and FSD production or not. A discriminant function was developed based on PLT, which showed poor predictive ability to distinguish FSD/non‐FSD category bulls. Age significantly influenced growth and dimensions of gonadal and external pelvic morphometry traits. The dimensions of PLT increased at higher rate up to 36 m age and thereafter enhancement became insignificant. Pelvic linear type traits were positively (p < .01) associated with testicular/scrotal traits. Among PLT studied, pelvic triangle area (PTA) was the strongest discriminating variable to distinguish between good and poor breeding bulls. Bulls of larger PTA (≥1000 cm2), at average 30 m age, produced relatively inferior‐quality semen, viz. lower volume (−3%), sperm concentration (−48 × 106/mL), motility, semen quality index, total sperm counts/ejaculate (−601 × 106), motile sperm counts/ejaculate (−474 × 106) and total post‐thaw motile sperm counts (−226 106), than bulls of lesser PTA (<1000 cm2). It was concluded that external PTA could be a useful addition to the bulls’ breeding soundness evaluation.

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

Cited by 6 publications

References 13 publications

Estimating internal pelvic sizes using external body measurements in the double-muscled Belgian Blue beef breed

Estimating internal pelvic sizes using external body measurements in the double-muscled Belgian Blue beef breed

Comparison of external morphological traits of newborns to inner morphological traits of the dam in the double‐muscled Belgian Blue Beef breed

Association of linear type pelvic traits with testicular characteristics and reproductive capability of breeding dairy bulls

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