Wool samples from various fleece regions (back, shoulder, britch and mid-side) of Polwarth and Corriedale hogget ewes were analysed in order to observe under which yolk analysis methodology (Wax extraction before Suint or Suint + Wax) the yolk traits showed the best correlation coefficients with scoured wool colour (Y-Z). The correlations between suint pH, colour, absorbancy and percent and wax percent with brightness and scoured wool colour were higher in Wax + Suint method (P < 0.01) to both breeds. The coefficients to Corriedales showed smaller values from those obtained with Polwarths. The suint pH, colour and absorbancy traits recorded stronger relationship with Y-Z than suint percent itself ( r = 0.62, 0.50, 0.61 vs. 0.36 in the Wax + Suint method to Polwarths). Wax percent had a medium coefficient correlation, significantly only to Polwarths, with Y-Z (negative value). Looking multiple regression analysis, it was possible to understand that suint pH and absorbancy and wax/suint ratio determined 36% of variations ocurred with Y-Z.
suint and wax contents; scoured wool colour; correlation
