Fig. 1. Histograms for fiber quality properties in the three populations BC1 (plain), BC2 (hashed), and BC2S1 (empty bars). Values of the G. hirsutum (variety Guazuncho 2, GUA) and of the G. barbadense (variety VH8) parent in each of the BC1 (plain triangle), BC2 (empty triangle), and BC2S1 (star) generation are indicated