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REGISTRATIONS OF CULTIVARS

Registration of ‘GA 161’ Cotton

^a Dep. Crop & Soil Sci., Univ. Georgia, Coastal Plain Station, P.O. Box 748, Tifton, GA 31793-0748
^b Dep. Plant Pathology, Univ. Georgia, 2106 Miller Plant Sci. Bldg., Athens, GA 30602
^c Dep. Crop & Soil Sci., Univ. Georgia, Coastal Plain Station, P.O. Box 748, Tifton, GA 31793-0748

* Corresponding author (lmay{at}tifton.cpes.peachnet.edu)

‘GA 161’ cotton (Gossypium hirsutum L) (Reg. no. CV-117, PI 612959) was developed by the Georgia Agricultural Experiment Station (GAES) and released in 1999. Exclusive marketing rights were granted in 2000 to Phytogen Seed Co., LLC, Leland, MS after a bid offering conducted by the University of Georgia Research Foundation, Inc. GA 161 is a smooth-leaf cultivar with an excellent combination of yield potential, fiber quality and adaptation throughout the southeastern U.S. (Lubbers et al., 2000).

GA 161 was tested in Official Cultivar Trials from 1996 to 1998 by the GAES under the experimental designation GA 92-161. Since 1999, Phytogen Seed Co. tested GA 161 as PSCGA 161.

The pedigree of GA 161 is 81-29/‘Coker315’//79-13/‘Deltapine 90’/3/Aub-244RNR/4/M-725RNR/5/PD6208. Lines 81-29 and 79-13 are root-knot nematode resistant types of unknown parentage obtained from R.L. Shepherd. Coker 315 has the pedigree ‘Coker 310’/Coker 8103, while Deltapine 90 was derived from the cross DP6516/DP6582 (Calhoun et al., 1997). Aub-244RNR (Shepherd, 1987) derives from the cross Aub-634RNR/‘Stoneville 213’, while M-725RNR (Shepherd et al., 1996) has the pedigree Aub-634RNR/3*‘Coker 310’. PD6208 (Culp et al., 1985) was derived from the cross of PD9363/PD9240. GA 161 is from the bulk increase of a single F₅ plant selection from the complex cross. All crosses, selection, and testing were conducted by S.H. Baker.

Averaged over 10 location-years from the 1996 and 1997 Georgia (Raymer et al., 1996, 1997) and South Carolina (May et al., 1996, 1997) Official Cultivar Trials, GA 161 produced equivalent lint yields and lint fractions compared with ‘HS-46’. The advantage of GA 161 over HS-46 is 4% longer upper half mean (UHM) fiber length and 1.3% higher fiber length uniformity index (UI), desirable traits for rotor yarn manufacture (El-Mogahzy, 1998). Compared with ‘NuCotn33B’ over 17 location-years from the 1999 High Quality Regional Cotton Variety Test (Rayburn, 1999) and the 1999 to 2000 Georgia (Day et al., 1999, 2000) and South Carolina (Jones et al., 2000; May et al., 1999) Official Cultivar trials, GA 161 produced similar lint yields, lint fractions, and micronaire readings, but had 5% longer UHM, 12% higher fiber bundle strength, and 12% stronger yarn tenacity. Compared with the popular cultivar Deltapine 458BR over 13 location-years in the 1999 to 2000 North Carolina (Bowman, 1999, 2000) and Georgia Official Cotton Cultivar Trials, GA 161 produced similar lint yields, lint fractions, and micronaire readings, but had 5% longer UHM, slightly higher (0.7%) UI, and 9% higher fiber bundle strength.

Compared with HS-46, ‘NuCotn 35B’, and ‘Deltapine 5690’, GA 161 has similar normal shaped leaves, low leaf trichome density, but has pubescent stems. Seed index of GA 161 averages greater than 10 grams (Rayburn et al., 1999), possibly contributing to its excellent seedling vigor.

GA 161 is moderately resistant to fusarium wilt [caused by Fusarium oxysporum Schlechtend.:Fr. f. sp. vasinfectum (Atk.) W.C. Snyder & H.N. Hans.], based on the 1997 National Cotton Fusarium Wilt Test (Glass and Gazaway, 1997). GA 161 has a low level of resistance to root-knot nematodes (Meloidogyne incognita), as two greenhouse trials (Davis and Baker, 1997, 1998) found it to support numerically higher, but not statistically different, levels of reproduction compared with the moderately resistant check cultivar LA 887 (Jones et al., 1991).

Breeder seed of GA 161 will be maintained by Phytogen Seed Co., LLC. Small quantities (25 g) can be obtained from Phytogen Seed Co., P.O. Box 27, Leland, MS, 38756. Application for Plant Variety Protection (Application no. 200000149) has been made by the University of Georgia Research Foundation, Inc.

ACKNOWLEDGMENTS

The authors thank Larry Thompson and Grant Henderson for technical assistance.

NOTES

Registration by CSSA.

Accepted for publication May 31, 2001.

REFERENCES

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