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Fig. 3. Graphical representation of the positions of QTL-rich regions mapped along the 26 chromosomes of the tetraploid cotton genome, as partitioned in 15 "carrier" and 11 "noncarrier" chromosomes. The 15 carrier chromosomes carry 19 QTL-rich "positive" regions (boxed in a plain frame), i.e., of a positive phenotypic effect conferred by the G. barbadense parent. Regions with "negative" QTLs (boxed in a dotted frame), indicating a negative phenotypic effect conferred by G. barbadense, are mapped along noncarrier and carrier chromosomes. Scale shown to the left is in cM.
