Tuesday, September 11, 2007 - 1:15 PM

Fiber quality traits following mutagenesis of TAM 94L-25

Mr. Nino Brown1, Dr. Wayne Smith1, Mr. Justin Duncan1, Dr. Dick L. Auld2, and Dr. Steve Hague1. (1) Texas A&M University, 2474 TAMUS, College Station, TX 77843, (2) Texas Tech University, Plant and Soil Sciences Department, Box 42122, Lubbock, TX 79409-2122

Seeds of TAM 94L-25 (Smith, 1998) 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 wereharvestedfromeachoftheseprogenyrowsplus 128 plants of the parent genotype (M0). The M0 generation plants averaged 30.7 mm UHM (range = 28.4 to 33.3), 288 kN m kg-1 strength (range = 249 to 299), and 3.4% elongation before break (range = 2.1 to 4.8). The 619 M3:4 selections had similar averages but greater ranges. UHM length averaged 30.7 mm with a range of 22.1 to 37.1 mm, strength averaged 299 kN m kg-1 with a range of 200 to 420 kN m kg-1and elongation averaged 3.0% with a range of 1.0 to 6.2%.


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