Friday, January 12, 2007 - 8:30 AM

Variability in Cotton (Gossypium Hirsutum L.) Fiber Quality Following Chemically Induced Mutation

Justin C. Duncan1, Cynthia C. Lowery2, C. W. Smith3, P. M. Thaxton4, Steve Hague3, C. Souder3, and Dick L. Auld5. (1) Cotton Improvement Lab, 1066 Turk Road, College Station, TX 77843, (2) Mail Stop 2122, Lubbock, TX 79409, (3) Texas A&M University, 2474 TAMU, College Station, TX 77843-2474, (4) Mississippi State University, PO Box 197, Stoneville, MS 38776, (5) Texas Tech University, Dept of Plant and Soil Science, Box 42122, Lubbock, TX 79409

Seed of TAM 94L-25 (Smith, 2002) were treated with EMS in 2001 and the M2 generation produced at Lubbock, Texas in 2002. More than 1200 M3 plants were grown at College Station, Texas in 2004, harvested individually, and HVI fiber properties determined at the International Textile Research Center at Lubbock. The highest and lowest 1% of the M3 plants for UHM length, fiber bundle strength, and elongation were selected and advanced to an M4 progeny row nursery in 2005. Up to 10 individual plants were harvested from each of these progeny rows plus 128 rows of the parent genotype. The M0 generation averaged 1.21 in. UHM (range = 1.12 to 1.31), 29.4 g/tex strength (range = 25.4 to 33.6), and 3.4 elongation (range = 2.1 to 4.80). The 619 M3:4 selections had similar averages but greater ranges. UHM length averaged 1.21 with a range of 0.87 to 1.46 in., strength averaged 30.6 g/tex with a range of 20.4 to 42.9 g/tex, and elongation averaged 3.0% with a range of 1.0 to 6.2.

Recorded presentation