Published online by Cambridge University Press: 27 March 2009
Kalla & Ghosh (1975) and Hopkins, Roberts & Evans (1975) recently reported finding a negative correlation between wool production and the erythrocyte concentration of reduced glutatione. Both groups also found a higher rate of wool production in GSH-low type animals than in GSH-high types. Because erythrocyte GSH types are genetically controlled and the GSH concentration within these types is highly heritable (Board, Roberts & Evans, 1974), Hopkins et al. (1975) concluded that selection for GSH-low type sheep may provide a method for manipulating wool production.