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At least 865 records · Page 48Linked to original sources
PubMed1991

Genetic parameters by son-sire covariances for growth and carcass traits of Hereford bulls in a nonselected herd.

Growth rates and weights at weaning, 365 d, and at slaughter were obtained on 616 bulls in a nonselected Hereford herd over a 10-yr period beginning in 1978. Carcass data were obtained for 401 of these bulls at 16 mo of age and on 101 that were sires or alternates and slaughtered at 30 mo of age. Fifty-five bulls slaughtered at 30 mo of age sired 301 male offspring on which growth data were obtained and 30 sired 169 male offspring on which carcass data were obtained. Bulls gained an average of .75 kg/d preweaning and 1.16 kg/d postweaning on a 168-d feed test. Rate of daily gain from the end of feed test to slaughter ranged from .7 to 1.2 kg/d. Time from the end of the feed test to slaughter ranged from 48 to 140 d. Slaughter weight, marbling score (Small = 12, Traces = 6), longissimus muscle area, fat covering over the 12th rib, percentage of kidney, pelvic and heart fat (KPH), and dressing percentage for bulls slaughtered as yearlings were 470 kg, 7.6 score, 82.5 cm, 8.2 mm, 1.0%, and 58.8%, respectively. The 30-mo-old bulls were slaughtered directly from range pastures. Marbling was devoid or practically devoid and fat covering over the 12th rib and KPH fat were insufficient to measure or estimate accurately. Sufficient variation was not available for statistical analyses of these traits. Slaughter weight, longissimus muscle area, and dressing percentage of 30-mo-old bulls were 583 kg, 91.8 cm, and 54.0%, respectively.(ABSTRACT TRUNCATED AT 250 WORDS)

Adipose Tissue↗
PubMed1982

Comparison of first lactations and all lactations of dams to predict sons' milk evaluations.

Multiple regression of genetic evaluations of about 170 Holstein bulls on sire, dam, and maternal grandsire genetic evaluations indicated that the partial regression coefficient for the sire is similar to the theoretical regression coefficient (.45 vs. .50), that the regression coefficient for the dam is much smaller than the theoretical regression coefficient when all records of the dam including her first are included in her evaluation (.12 vs. .35), although about as expected when only first records of the cow and her herdmates are used (.33 vs. .35), and that the regression for the maternal grandsire is larger than expected when his proof and all records of the dam are used in her evaluation (.07 vs. .00), although about as expected when his proof and only her first record is used (-.02 vs. .00). Preferential treatment of potential bull dams is a possible explanation for these results. Genetic correlations among lactations are not likely to be small enough to account for the differences in regression coefficients for the dam's genetic evaluations for all and first lactations. If conditions for selecting bull dams in the future will be similar to what they have been in the past, the conclusion is that genetic evaluations of cows from their first lactation records be used in preference to genetic evaluations from all lactation records for selection of dams of bulls.

Animals↗
PubMed1983

Comparison of dams' estimated transmitting abilities from first lactation herdmates or all records of herdmates to predict sons' milk evaluations.

Multiple regression of genetic evaluations for milk yields of first lactations of 159 Holstein bulls on sire, dam, and maternal grandsire evaluations indicates that the weight for estimated transmitting ability of the dam calculated from the first record of the dam and first records of her herdmates is about as theoretically expected and is markedly superior both to estimated transmitting ability computed from the first record of the dam and all records of her herdmates and to estimated transmitting ability computed from all records of the dam and her herdmates. The latter two procedures gave similar results.

Animals↗
PubMed2006

"Like mother, like son:" hereditary anterior sacral meningocele. Case report and review of the literature.

Anterior sacral meningocele (ASM) is a relatively rare, congenital disorder. Usually it presents sporadically, but there are case reports of hereditary ASMs and evidence of a dominant mode of inheritance. In this article the authors describe a case illustrating the hereditary nature of ASM and present available literature on the disease. The authors present the case of a 19-month-old boy in whom an ASM was diagnosed during a workup for constipation. The child's 31-year-old mother had been treated for the same condition 20 years earlier, when she had presented with back pain. These cases are discussed in the context of previous reports of similar cases. There are several case reports in the literature in which an ASM occurred as a familial, isolated disorder (in the absence of other caudal abnormalities or syndromes). The condition is reported more commonly in women, but it is unclear whether this is a true difference in prevalence or a diagnosis or reporting bias. A review of the literature indicates an autosomal-dominant inheritance with variable penetrance and presentation. Anterior sacral meningoceles can be hereditary. Given the potential complications of the disease if left untreated and the simplicity of screening--obtaining an abdominal radiograph and the patient's clinical history--we recommend screening of immediate family members of affected individuals. Surgical treatment is recommended if an ASM is discovered.

Adult↗
PubMed1990

Parents as caregivers: when a son has AIDS.

1. Factors to consider in parental reactions to children with AIDS are the unique relationship of each family member to the affected individual; the difference of the parent's reaction compared with other family members; and the roles that the person with AIDS plays in each individual's life. 2. The debilitation caused by AIDS often leads to regression to earlier developmental stages; parents are confronted with a need to once again provide basic support as they work to attain completion of their own psychosocial tasks. 3. Caring for patients with AIDS presents profound challenges to nursing; nurses must carefully schedule breaks and vacations so that this does not become the focus of all their attention.

Acquired Immunodeficiency Syndrome↗