Fibre quality data were measured by HVI and arealometer.
We calculated fineness in US data by converting the reported arealometer weight fineness to the same units as FMT (μg/m).
The US data were from randomised complete block designs,
and were analysed by ANOVA in SAS (SAS institute, 2008).
The genotype × location interaction was used as the error term in F tests ( USDA, 2011).