HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH SEARCH RESULT		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Thaxton, P.M. Articles by Cantrell, R. Search for Related Content PubMed Articles by Thaxton, P.M. Articles by Cantrell, R. Agricola Articles by Thaxton, P.M. Articles by Cantrell, R.

REGISTRATIONS OF GERMPLASMS

Registration of TAM 96WD-69s Glabrous Upland Cotton Germplasm Line

^a Dep. of Soil and Crop Sciences, Texas Agric. Exp. Stn., Texas A&M Univ. System, College Station, TX 77843-2474
^b Cotton Incorporated, 6399 Weston Parkway, Cary, NC 27513

^* Corresponding author (pthaxton{at}ag.tamu.edu)

TAM 96WD-69s, upland cotton (Gossypium hirsutum L.) germplasm line (Reg. no. GP-790, PI 635878), was developed by the Cotton Improvement Laboratory, Department of Soil and Crop Sciences, Texas Agricultural Experiment Station (TAES) and released in 2004 as part of an ongoing effort to create glabrous germplasm and cultivars with improved yield potential, fiber quality, and resistance to fleahopper [Pseudatomoscelis seriatus (Reuter)] and silverleaf whitefly [Bemesis argentifolli (Perring and Bellows)]. TAM 96WD-69s is a near glabrous leaf and stem line that combines high yield potential with good fiber qualities and is adapted to south and central Texas.

TAM 96WD-69s was derived from the cross of TAM 88G-104 (Smith, 2001) with 87AAA-1, an unreleased glabrous breeding line developed by the Cotton Improvement Laboratory of the TAES at College Station, TX. TAM 88G-104, released and marketed as ‘Texas 418’, is a high-yielding picker-type upland cotton with resistance to silverleaf whitefly. Hybridization and pedigree selection leading to the development of TAM 96WD-69s was performed at Weslaco, TX. TAM 96WD-69s was derived from a single F_2:3 plant selected on the basis of its fiber properties, apparent yield potential, overall plant conformation, and smooth leaves. The resulting F_3:4 progeny row was selected on the basis apparent yield potential, smooth phenology, and high volume instrument fiber properties.

TAM 96WD-69s is a midseason maturity, picker-type cotton with normal leaf and bract shapes, and smooth leaves and stems. Fully expanded leaves of TAM 96WD-69s averaged 9 trichomes cm^–2 while leaves of ‘Deltapine 50’ (Calhoun et al., 1994), ‘Tamcot 22’ (Thaxton and Smith, 2005), and ‘Tamcot CAB-CS’ (Bird et al., 1986) averaged 12, 33, and 4 trichomes cm^–2, respectively. The stems of TAM 96WD-69S averaged 1 trichome cm^–2 compared with 6 trichomes cm^–2 on Deltapine 50, 8 trichomes cm^–2 on Tamcot 22, and 0.4 trichomes cm^–2 on Tamcot CAB-CS. The number of trichomes on bract margins of TAM 96WD-69s was 76 cm^–2 while Deltapine 50, Tamcot 22, and Tamcot CAB-CS averaged 86, 242, and 72 cm^–2, respectively.

Levels of square damage due to cotton fleahopper in 2001 and 2002 for 20 cotton lines were quantified in the field and greenhouse (Mekala, 2004). TAM 96WD-69s sustained a low level of square damage, similar to ‘Lankart 142’, ‘Sure-Grow 747’, Deltapine 50, and ‘Stoneville 474’, and lower than MAR-PD22 (glabrous), ‘Acala Maxxa’, TAM-96WD22s (near-smooth isoline of Tamcot 22), and ‘All-Tex Atlas’. Hence, TAM 96WD-69s was relatively resistant to fleahopper based on the percentage square set.

TAM 96WD-69s was performance tested at Weslaco, Corpus Christi, and College Station in 1998 and 1999, and evaluated across eight locations (Weslaco, Corpus Christi, San Patricio County, College Station, Uvalde, Thrall, Dallas, and Chillicothe) for yield, gin turnout, and fiber quality under the name 96WD-69s from 2000 to 2002. TAM 96WD-69s was compared with Deltapine 50, Sure-Grow 125, and ‘Tamcot Sphinx’ (El-Zik and Thaxton, 1996), all popular cultivars in south and central Texas in the late 1990s. Deltapine 50 was deleted as a comparison cultivar in 2001 and 2002, and ‘FiberMax 832’ replaced Sure-Grow 125 in 2001 because of its excellent fiber quality and production in large areas of south and central Texas. The performance trials were grown with irrigation at Weslaco, College Station, Uvalde, and Chillicothe, and without irrigation at Corpus Christi, Thrall, and Dallas. TAM 96WD-69s produced similar or higher yields (P = 0.05) than Sure-Grow 125, Deltapine 50, and Tamcot Sphinx in 20 of 23 performance trials and exhibited similar fiber quality traits. TAM 96WD-69s exhibited a lower gin turnout (P = 0.05) than the same cultivars. TAM 96WD-69s has similar upper-half mean fiber length (UHM) (P = 0.05) to those of Sure-Grow 125 and Tamcot Sphinx, and fiber bundle strength was similar to or better (P = 0.05) than Sure-Grow 125. TAM 96WD-69s has 8% shorter UHM fiber length and 12% weaker fiber bundle strength than FiberMax 832. The micronaire reading of TAM 96WD-69s averaged 0.3 units lower than Tamcot Sphinx and Sure-Grow 125, but similar to that of FiberMax 832.

Research leading to the development of TAM 96WD-69s was supported in part by grants from the Texas Food and Fibers Commission, and Cotton Incorporated's Texas State Support program. Small quantities of seed may be obtained for breeding purposes from the corresponding author.

NOTES

Registration by CSSA.

Accepted for publication November 30, 2004.

REFERENCES

• Bird, L.S., K.M. El-Zik, and P.M. Thaxton. 1986. Registration of ‘Tamcot CAB-CS’ upland cotton. Crop Sci. 26:384–385.[Free Full Text]
• Calhoun, D.S., D.T. Bowman, and O.L. May. 1994. Pedigrees of upland and pima cotton cultivars released between 1970 and 1990. Miss. Agric. For. Exp. Stn. Bull. 1017. Mississippi State, MS.
• El-Zik, K.M., and P.M. Thaxton. 1996. Registration of ‘Tamcot Sphinx’ cotton. Crop Sci. 36:1074.[Free Full Text]
• Mekala, K.D. 2004. Screening of upland cotton for resistance to cotton fleahopper (Heteroptera: Miridae). M.S. Thesis. Texas A&M Univ., College Station, TX.
• Smith, C.W. 2001. Registration of TAM 88G–104 high-yielding upland cotton germplasm. Crop Sci. 41:1369–1370.[Free Full Text]
• Thaxton, P.M., and C.W. Smith. 2005. Registration of ‘Tamcot 22’ high-yielding upland cotton cultivar. Crop Sci. 45:1165–1166 (this issue).[Free Full Text]

This Article Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Thaxton, P.M. Articles by Cantrell, R. Search for Related Content PubMed Articles by Thaxton, P.M. Articles by Cantrell, R. Agricola Articles by Thaxton, P.M. Articles by Cantrell, R.