Though having relatively long fibre,
these CA and NM cultivars are not well suited to AUS soil type,
climate, insect pest pressure and diseases.
By omitting these cultivars in AUS data, the R2 almost doubles to 0.21 (P < 0.001); intercepts increase by 3 mm to about 35.5 mm; and slopes increase (not shown).
Outliers in the US data were two TAM genotypes, which had lengths greater than 32 mm with below average yield; the lower fibre lengths were MD and JACO genotypes from 1999.