Data from five separate field experiments assessing multiple breeding lines were evaluated for fibre quality and yield components from 2006 to 2012 at the Australian Cotton Research Institute (ACRI) in Narrabri, NSW. The soil type on which these experiments were grown is classified as Ug 5.2 (Isbell, 1996), grey clay with heavy texture; the US classification is Typic Haplustert (USDA, 2010). Experiments were sown in early to mid October in single rows 100 cm apart. Crops were managed with full irrigation, spraying for insects as required and weed management by pre-plant herbicides such as trifluralin and fluorometuron, followed by inter-row cultivation prior to flowering.