Inheritance of Acid Red 1 dye absorption and its relationship to other Merino wool traits
A. C. Schlink A C , S. Ortega A , J. C. Greeff B and M. E. Dowling BA CSIRO Livestock Industries, Private Bag 5, Wembley, WA 6913, Australia.
B Western Australian Department of Agriculture, 10 Dore St, Katanning, WA 6317, Australia.
C Corresponding author. Email: tony.schlink@csiro.au
Australian Journal of Experimental Agriculture 46(7) 943-946 https://doi.org/10.1071/EA06011
Submitted: 30 November 2005 Accepted: 20 March 2006 Published: 8 June 2006
Abstract
Optimising and ensuring the reproducibility of wool dyeing is of significant economic importance to the wool industry. Midside wool from 1824 Merino ewe and ram hoggets was used to estimate the heritability of Acid Red 1 dye absorption in clean wool. Acid Red 1 absorption had a high heritability of 0.45 ± 0.07 and was phenotypically poorly correlated with fibre diameter (–0.11 ± 0.03), the coefficient of variation of fibre diameter (0.05 ± 0.03), curvature (–0.05 ± 0.03), staple strength (–0.02 ± 0.02) and staple length (–0.09 ± 0.03), yield (0.08 ± 0.03) and dust penetration (0.07 ± 0.03). It was not genetically correlated with fibre diameter (–0.05 ± 0.09), the coefficient of variation of fibre diameter (0.02 ± 0.09), curvature (–0.09 ± 0.09), staple strength (–0.07 ± 0.10) or staple length (–0.03 ± 0.08), but weakly genetically correlated with yield (0.18 ± 0.08) and dust penetration (0.24 ± 0.12). Dye absorption was also genetically negatively correlated with wool felting as measured by feltball diameter (–0.26 ± 0.09). Acid Red 1 absorption was not genetically correlated with absorption of the cationic dye Methylene Blue. We suggest that there is a biological basis for differences between wools in dyeing performance and that this variation will depend on the class of dye being evaluated for wool dyeing.
Acknowledgments
The authors wish to knowledge the technical support of Anne Murray and the staff at Katanning for maintenance of the Resource flocks. One of the authors (S. Ortega) was the recipient of a CSIRO Summer Student Scholarship.
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