Differences in body compositions, growth and food intakes between mice which have been selected for a small and large body size.

摘要: 1. Q-strain mice selected for high-line (QLF) or low-line (QSC) body-weights at 6 weeks of age were culled to litters two eight (QLF-2, QLF-8, QSC-2, QSC-8) birth and suckled in these groups until 19 d age. 2. Body-weights measured daily all body compositions compared 42 Food intakes urinary faecal nitrogen during metabolism trials between d. 3. QLF-2 QSC-2 grew faster than the corresponding They also deposited more fat as a percentage total gain. 4. In period 19-42 influence genetic selection reappeared was manifest slowing growth rates animals so that by there no differences body-weight within line. 5. During food each group line did not differ although, on basis intake per unit metabolic (g/kg 0.75 d) ate less QLF-8 QSC-8 respectively. 6. The largely overcome increased contribution protein water weight gain post-weaning period.