Bernard Leclercq

TL;DR: Two lines of broiler breeders were selected for three generations using a high (fatty line) or a low (lean line) ratio of abdominal fat to live weight as criterion in males at 9 weeks of age, with marked progress achieved in males than in females.

TL;DR: Different effects of lysine, threonine, and valine can induce different amino acid requirement profiles according to the criteria used for determining the requirement, and the particular mathematical model being used to calculate amino acid requirements can also influence amino acid needs.

TL;DR: A common reference procedure adopted by several European laboratories to determine apparent metabolisable energy corrected to zero-nitrogen balance (AMEn) is described, and values measured by individual laboratory procedures were very close to those obtained by the reference method.

TL;DR: In vivo lipogenesis was estimated in liver and carcass of male chickens selected for leanness (LL) or fatness (FL) by use of tritiated water and differences between lines were still not significant.

TL;DR: Determined AMEn values were very similar to those predicted using three different regression equations, suggesting that AMEn energy values of these fats are indistinguishable at this inclusion rate when diets contained added fat.