Evaluate the collective function of references cited together in a given text segment.
Classify their combined role into one of the following categories: 'method', 'background', or 'result'.

Text:…to detect QTL related to yield components or fiber traits using mapping populations derived from different fiber mutants (Rong et al. 2005, 2007; Abdurakhmonov et al. 2007) or a multiple dominant marker line T586 (including a fuzzless locus N1) (Zhang et al. 2005; Guo et al. 2006; Wan et al. 2007).
Category: