Pedigrees of Obsolete and Current Extra Long Staple Upland Cotton

An objective of U.S. cotton breeding programs is to provide raw material that processes efficiently and produces better textile products, without compromising yield. Annual domestic consumption dropped from 10.4 million bales in 1998 to 5.5 million bales in 2007.  Exports increased from 4.3 to 16.2 million bales. Increased reliance on export markets will require the U.S. to compete more effectively in price and quality. The desired minimum Upper Half Mean (UHM) fiber length in international markets is 28 mm while the traditional U.S. minimum is 27 mm. To compete at this higher UHM length expectation, breeding programs should target minimums well above the international base. Extra Long Staple (ELS) upland cotton (Gossypium hirsutum L) germplasm lines were developed by the Cotton Improvement Lab (CIL), Department of Soil and Crop Sciences, Texas A&M AgriLife Research as part of an effort to create germplasm  with combinations of improved fiber quality, especially UHM length and fiber bundle strength. These ELS upland lines exhibit High Volume Instrument (HVI) UHM  length greater than 32.0 mm, and several strains exceed  34.8 mm, which is the minimum UHM length for pima (G. barbadense L.). TAM 94L-25 (PI  631440), or its full sib 94L-2 (unreleased), is the common parent in these ELS strains. The pedigree of TAM 94L-25 will be discussed along with the known pedigrees of other ELS uplands in the Cotton Collection.