Charlotte Rehfeldt

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In polytocous species such as the pig there is intralitter variation in birth weight and skeletal muscle fiber number. It is commonly recognized that low birth weight in piglets correlates with decreased survival and lower postnatal growth rates. In the majority of low birth weight piglets low numbers of muscle fibers differentiate during prenatal(More)
The aim of this study was to investigate whether dietary protein intake during gestation less than or greater than recommendations affects gilts growth and body composition, gestation outcome, and colostrum composition. German Landrace gilts were fed gestation diets (13.7 MJ of ME/kg) containing a low (n = 18; LP, 6.5% CP), an adequate (n = 20; AP, 12.1%),(More)
To re-examine the relationship of birth weight with carcass and meat quality of pigs at market weight, offspring (n=378) of 63 sows were assigned to three birth weight groups; 25% low weight (LW), 50% middle weight (MW), and 25% heavy weight (HW), with runts (<800g) being excluded. LW pigs exhibited the lowest postnatal growth performance, the lowest lean(More)
AIM This study investigated whether dietary protein intake less (50%) or greater (250%) than requirements throughout gestation differently affects offspring body composition and cellular properties of skeletal muscle and subcutaneous adipose tissue (SCAT). METHODS Primiparous gilts were fed iso-energetic diets containing adequate (22 AP), high (21 HP), or(More)
This study was conducted to investigate the impact of domestication of the pig on various cellular properties of skeletal muscle. For this purpose, samples of semitendinosus (ST), psoas major (PM), and longissimus (LD) muscles of 24 European wild boars (WB; Sus scrofa scrofa) and of 28 domestic pigs (Sus scrofa domestica) of German Landrace (DP) were taken(More)
Prenatal growth is very complex and a highly integrated process. Both maternal nutrition and the maternal somatotropic axis play a significant role in coordinating nutrient partitioning and utilization between maternal, placental and fetal tissues. Maternal nutrition may alter the nutrient concentrations and in turn the expression of growth regulating(More)
The understanding of skeletal muscle growth is an important goal in animal science and in human medicine. The purpose of this review is to demonstrate the importance of muscle fibre number for muscle growth and the influence of selected genetic and environmental factors on muscle fibre number. The total number of muscle fibres is mainly determined(More)
This study on heifers (n = 27) compared the effects of a GnRH antagonist (Antarelix) and those of an agonist (Triptorelin) on gonadotropin release during the periovulatory period of the oestrous cycle. In three experiments (EXP I-III), an initial injection of GnRH analogs was given 48 h after a single PGF 2alpha pretreatment during the luteal phase, with a(More)
By the help of histological methods the changes in skeletal muscle of laboratory mice, which had different levels of exercise during postweaning period (training, confinement) or had been selected for body weight and endurance fitness (Du-6+LB), were investigated. The animal groups with the better endurance fitness (Du-6+LB, trained) had a higher total(More)
The murine myostatin mutation Mstn Cmpt-dl1Abc (Compact; C) was introduced into an inbred mouse line with extreme growth (DUHi) by marker-assisted introgression. To study the allelic effects on muscle fibre hyperplasia and hypertrophy, myonuclear proliferation, protein accretion, capillary density, and muscle fibre metabolism, samples from M. rectus femoris(More)