GROWTH EFFICIENCY IN MICE SELECTED FOR INCREASED BODY WEIGHT
نویسندگان
چکیده
منابع مشابه
Feed efficiency, growth rates, body composition, milk production and milk composition of Targhee sheep selected for increased weaning weight.
Lactation and growth of three contemporary lines of grade Targhee sheep developed from the same genetic base were characterized by three experiments performed over a period of 2 yr. Two lines (HW and DH) had been selected for 120-d weaning weights for 24 yr prior to beginning these experiments. A third line (C) was a randomly selected control. Year I experiment contrasted 10 DH with 7 C ram lam...
متن کاملGrowth and reproduction in mice selected for rapid body weight gain.
EVERAL investigators have reported the results of selecting for measures of growth rate or body size in mice (GOODALE 1938; MACARTHUR 1944, 1949; FALCONER 1953; RAHNEFELD et al. 1963; ROBERTS 1967). Direct response to selection has been substantial in each of these cases. Litter size has been shown to increase in several of the lines, the increase in the experiment reported by RAHNEFELD et al. ...
متن کاملPrenatal and postnatal maternal influences on growth in mice selected for body weight.
NE method of studying the inheritance of body size in mammals involves the divergent selection of lines for large and small size. A difficulty encountered in this type of experiment is that the differences obtained in body weight or in traits genetically correlated with body size may not be due solely to the genatype for growth rate per se, but may include prenatal and postnatal maternal differ...
متن کاملStress-induced colibacillosis and turkey osteomyelitis complex in turkeys selected for increased body weight.
Two stress models were used to induce colibacillosis and turkey osteomyelitis complex (TOC): Escherichia coli challenge following dexamethasone injection (Dex) and E. coli challenge preceding transport stress (Transport). A total of 160 birds from 3 lines of turkeys: a slow-growing line selected for egg production (Egg), a line selected for 16-wk BW (F line), and a Commercial line (Comm), were ...
متن کاملAverage genetic and heterotic effects on growth in mice selected for large 6-week body weight or rapid postweaning gain.
Data on body weights at 3 weeks (WK3) and 6 weeks (WK6) and postweaning gain from 3 to 6 weeks (GAIN) were analyzed in eight populations of mice to estimate the differences between populat ions in average direct genetic effects (ADG), average maternal genetic effects (AMG) and direct heterotic effects (DH). The effects of population, sex, group size and interactions were examined. Females were ...
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ژورنال
عنوان ژورنال: Canadian Journal of Animal Science
سال: 1990
ISSN: 0008-3984,1918-1825
DOI: 10.4141/cjas90-049