M. N. Katanbaf

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Reproductive traits of females from a broiler-breeder parent stock segregating for early and late feathering were measured under four feeding regimens. Feeding regimens consisted of ad libitum (AL, feed was always available), ad libitum restricted (ALR, feed restricted daily to control body weight), and skip-one-day and skip-two-days (SOD and STD, given two(More)
Broiler-breeder females from a parent stock segregating for early and late feathering were fed ad libitum (AL, feed was always available), ad libitum restricted (ALR, feed restricted daily to control body weight), skip-one-day and skip-two-days (SOD and STD, given two or three times ALR allowance on Day 1 and not fed on the next 1 or 2 days, respectively).(More)
Life cycle changes in bone mineralization and bone size traits of the tibia and humerus were evaluated in commercial male and female broilers using dual-energy x-ray absorptiometry (DEXA). Experiment 1 evaluated weekly changes in bone traits from 2 to 7 wk of age, whereas experiment 2 compared the bone traits of 4 strains of commercial meat-type chickens(More)
The variability of bone traits was assessed in purebred lines of meat-type chickens using dual-energy x-ray absorptiometry. Experiment 1 evaluated changes in bone mineralization and size traits of the tibia and humerus in 4 purebred lines from 6 to 24 wk of age. Experiment 2 compared the same traits of the tibia, radius, and ulna of 9 purebred lines at 6 wk(More)
Allomorphic relationships in chickens selected for high or low juvenile body weight and their reciprocal crosses were examined from hatch to 56 days of age (doa). Those organs whose relationships to whole body weight were most divergent in the parental populations were weights of the gizzard, small intestine, breast, legs, feathers, abdominal fat and(More)
Broilers selected for increased body size and breast muscle have imposed stress on the skeletal system, resulting in poorer walking ability. Our objectives were to determine the relationship between bone mineralization and gait score in 4 crosses of commercial broilers and to ascertain if mineralization of the toe is correlated to the tibia. Three chickens(More)
Carcass composition traits and weights and lengths of organs relative to body weight were measured in females from a broiler-breeder parent stock segregating for early and late-feathering alleles maintained under four feeding regimens. Feeding regimens consisted of ad libitum (AL), ad libitum restricted (ALR, feed restricted daily), and skip-one-day and(More)
Organ growth of male chickens selected for high and low 56-day body weight and their reciprocal F1 crosses was compared at a common age (56 days) or at a common body weight (180 g). Organs that differed at a common body weight included weights of proventriculus, small intestine, lungs, feathers and abdominal fat and length of esophagus. Organ weights that(More)
Growth and responses to potential stressors were measured in early (k+) and late (K) feathering chicks from a common commercial broiler parent stock. Body weights were not different at 3, 10, or 49 days of age with ad libitum feeding, but K/K cockerels were heavier than k+/k+ ones at 24, 38, and 52 days of age with alternate day feeding. No differences in(More)
The objective of the following study was to determine the incidence of tibial dyschondroplasia (TD) among 4 crosses (crosses A, B, C, and D) of male meat-type commercial broilers and its relationship to gait score at 6 wk of age. At 38 and 39 d of age, 360 birds were evaluated individually for gait score. Three male chickens/pen with good walking ability(More)