caa a22 4500 386320926 CHVBK 20180307111626.0 cr unu---uuuuu 161130e198808 xx s 000 0 eng 10.1017/S0003356100037090 doi S0003356100037090 pii (NATIONALLICENCE)cambridge-10.1017/S0003356100037090 Electron spin resonance of wool from Merino sheep heterozygous or homozygous for white fleece [Elektronische Daten] Wool samples were collected from two groups of Merino sheep, both of which contained animals that were either heterozygous (Ww) or homozygous (WW) for white fleece. Group 1 were sampled in summer and group 2 in winter. These samples were scoured and measured for electron spin resonance initially (ESR1), following irradiation by ultraviolet light (ESR2) and then after wetting and drying the sample (ESR3). There was no significant difference between WW and Ww sheep in each group for any of the ESR measurements (P > 0·05). However, for ESR1 there was a difference between management groups (group 1> group 2; P < 0·05). The ESR3 on ESR1 values were plotted separately for WW and Ww genotypes. The plotted ESR3 on ESR1 values in both groups showed no differentation into distinct genotype clusters. Nevertheless, for group 2 there was a slight similarity to the cross-like pattern of genotypes reported in an earlier description of this technique and the regression coefficients of ESR3 on ESR1 for WW sheep (b = −0·09 (s.e. 0·28)) differed significantly from those of Ww sheep (b = 1·31 (s.e. 0·52)) (P < 0·05). It appears that the previously published method for differentiating between sheep that are either heterozygous or homozygous for white fleece was ineffective in this case. Copyright © British Society of Animal Science 1988 Fleet M. R. Department of Agriculture, Animal Research Branch, Box 1671 GPO, Adelaide 5001, Australia Lincoln S. F. University of Adelaide, Department of Physical and Inorganic Chemistry, Box 498 GPO, Adelaide 5001, Australia Hounslow A. M. University of Adelaide, Department of Physical and Inorganic Chemistry, Box 498 GPO, Adelaide 5001, Australia Animal Production Cambridge University Press 47/1(1988-08), 97-103 0003-3561 47:1<97 1988 47 ASC https://doi.org/10.1017/S0003356100037090 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0003356100037090 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Fleet M. R. Department of Agriculture, Animal Research Branch, Box 1671 GPO, Adelaide 5001, Australia NATIONALLICENCE 700 1- Lincoln S. F. University of Adelaide, Department of Physical and Inorganic Chemistry, Box 498 GPO, Adelaide 5001, Australia NATIONALLICENCE 700 1- Hounslow A. M. University of Adelaide, Department of Physical and Inorganic Chemistry, Box 498 GPO, Adelaide 5001, Australia NATIONALLICENCE 773 0- Animal Production Cambridge University Press 47/1(1988-08), 97-103 0003-3561 47:1<97 1988 47 ASC CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge