Registration of ‘Tamcot G11’ Upland Cotton Cultivar

Abstract

‘Tamcot G11’ upland cotton (Gossypium hirsutum L.) cultivar (Reg. No. CV‐135, PI 682743) was developed by Texas A&M AgriLife Research and released in 2017 as part of an ongoing effort to create cultivars and germplasm with combinations of improved fiber quality parameters, especially upper half mean length (UHML) and fiber bundle strength. Tamcot G11 is a conventional cultivar that is competitive in lint yield potential with current upland cultivars available for production in central and south Texas. Tamcot G11 exhibited significantly longer UHML, measured by high volume instrument (HVI), than the average of all comparison cultivars in 16 of 17 performance trials across central and south Texas during 2013 through 2016. Micronaire of Tamcot G11 was within the premium range in 12 of the 17 performance trials, while the control cultivars averaged the premium range in only 3 or the 17 trials. Strength of Tamcot G11 and the mean of all controls were equal in all except two trials, whereas Tamcot G11 tended to have lower fiber elongation at break. Lint yield of Tamcot G11 was equal to or greater than the average of all control cultivars in 16 of the 17 trials. Lint percentage of Tamcot G11 was acceptable yet below that of most current upland cultivars. Tamcot G11 provides producers with a competitive, high‐quality conventional cultivar with UHML sufficient to reduce the probability of discounts based on fiber length.

TAM BB‐2139 ELSU extra long staple upland germplasm

“…Data in Table support the advantage that the ELSU trait would provide producers of dryland cotton in Texas and other areas of the United States as reported by Bhangu et al. () and Smith, Hequet, Hague, and Jones (). Phytogen 499 WRF would have been discounted $0.0627 kg −1 , Deltapine 1552 B2XF and Phytogen 312 WRF would not receive a penalty or premium based on UHML, Deltapine 1646 B2XF would have received a premium of $0.0407 kg −1 , and TAM BB‐2139 ELSU would have received a premium of $0.0473 kg −1 based on the 2017 cotton loan chart (USDA‐FSA.…”

“…Strain B182-39 ELSU, a sister line of TAM B182-33 ELS (Smith et al, 2009), was crossed with 'Deltapine 491' (PVP 200100159, PI 618609) at College Station, TX, in 2005. Twenty-seven individual F 2 plants were selected at Weslaco, TX, in 2007 and ginned on a laboratory saw gin; fibers were sent to the Texas Tech University Fiber and Biopolymer Research Institute in Lubbock, TX, for high volume instrument (HVI) analysis and to Cotton Incorporated, Cary, NC, for advanced fiber information system (AFIS) analysis.…”

“…TAM BB-2139 ELSU was selected for the ELSU trait but also for its improved lint percentage relative to the original ELSU releases (Smith et al, 2009). In strain tests performed in 2016 at Weslaco and College Station, both irrigated, TAM BB-2139 ELSU averaged 36.7% lint, significantly greater than TAM B182-33 ELSU, which averaged 31.1%, but lower than three commercial controls that averaged 39.4% (data not shown).…”

“…Development of long staple upland (LSU) and extra long staple upland (ELSU) with improved fiber bundle strength and fiber fineness (i.e., good maturity and lower fiber diameter) could improve the market position of US producers. The Cotton Improvement Lab at Texas A&M AgriLife Research has developed breeding lines with these characteristics (Smith, Hague, Thaxton, Hequet, & Jones, ; Smith, Hequet, Hague, & Jones, , , ; Smith, Thaxton, Hague, Hequet, & Jones, ). These longer UHML characteristics could be especially beneficial to nonirrigated production in many parts of Texas that receive little rainfall during the growing season and thus often produce fibers below the minimum UHML.…”