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ARS Home » Plains Area » College Station, Texas » Southern Plains Agricultural Research Center » Crop Germplasm Research » Research » Publications at this Location » Publication #416482
Research Project: Management of Cotton Genetic Resources and Genetic Improvement of Cotton

Location: Crop Germplasm Research

Title: Registration of 13AFX6 and 13AFX13 cotton germplasm lines with fiber strength and length

Author
item Hinze, Lori
item Campbell, Benjamin
item Percy, Richard

Submitted to: Journal of Plant Registrations
Publication Type: Germplasm Registration
Publication Acceptance Date: 11/6/2024
Publication Date: 2/25/2025
Citation: Hinze, L.L., Campbell, B.T., Percy, R.G. 2025. Registration of 13AFX6 and 13AFX13 cotton germplasm lines with fiber strength and length. Journal of Plant Registrations. 19(1). Article e20414. https://doi.org/10.1002/plr2.20414.
DOI: https://doi.org/10.1002/plr2.20414

Interpretive Summary: Increased fiber strength and length are needed in cotton cultivars to produce high quality cotton yarns. As new technology is adopted to spin fiber into yarn, breeders must develop new cotton types with increasingly longer and stronger fibers. Two upland (Gossypium hirsutum L.) cotton germplasm lines were developed and released by the Agricultural Research Service, College Station, TX. These lines have higher fiber strength and fiber length when compared to other lines grown in a multi-environment trial across the U.S. cotton growing region. Both germplasm lines will provide breeders with additional sources of excellent fiber strength and length with broad adaptation in good agronomic backgrounds. These new lines offer significant improvement in traits essential to produce high quality yarns.

Technical Abstract: 13AFX6 (Reg. No. GP-xxx, PI xxxxxx) and 13AFX13 (Reg. No. GP-xxx, PI xxxxxx) are noncommercial breeding lines of cotton (Gossypium hirsutum L.) released by the USDA-Agricultural Research Service in 2023. 13AFX6 and 13AFX13 display superb fiber strength and length notably better than high fiber quality cultivars used as checks and are broadly adapted to the U.S. Cotton Belt. 13AFX6 is a breeding line selected from a cross of '0145-2B-320' and 'PX06520-42-2-1'. 13AFX13 is a breeding line selected from a cross of 'CG-26201' and 'AGC208'. These initial crosses were followed by individual plant selections in the F2 and F3 generations, and progeny row selection in the F4 generation. The F4 selections were grown in replicated tests at College Station, TX, and Florence, SC, in 2017 and 2018. The two best unrelated lines from these evaluations were grown in the Regional Breeders Testing Network in 2019. In this trial, 13AFX6 had significantly higher fiber strength and fiber length than any of the entries in the test. 13AFX13 also had excellent fiber strength and length, significantly higher than the checks used in the trial. Both lines had lint yields like the FM958 check with 13AFX13 yielding higher and equivalent to the DP493 check. The outstanding fiber quality traits and broad adaptation make 13AFX6 and 13AFX13 excellent choices to use as parents to incorporate fiber quality into cotton breeding programs.