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REGISTRATIONS OF CULTIVARS

Registration of ‘Georgia-01R’ Peanut

Dep. of Crop and Soil Sciences, Univ. of Georgia, Coastal Plain Exp. Stn., Tifton, GA 31793-0748

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

‘Georgia-01R’ (Reg. no. CV-70, PI 629027) is a new multiple pest resistant runner market type peanut (Arachis hypogaea L. subsp. hypogaea var. hypogaea) cultivar that was released by the Georgia Agricultural Experiment Stations in 2001. It was developed at the University of Georgia, Coastal Plain Experiment Station.

Georgia-01R was derived from a cross made in 1989 between PI 203395 and Georgia Browne (Branch, 1994). Sequential selection method (Branch et al., 1991) was practiced within the early segregating (F₂, F₃, and F₄) populations, and individual resistant plants were sequentially selected each year under heavy soilborne disease pressure, heavy leafspot disease pressure, and heavy Tomato spotted wilt virus (TSWV) pressure without any fungicide and insecticide applications. Performance testing was begun in the F_4:6 generation with the advanced pure-line selection, GA 942511.

During three consecutive years 1997 through 1999 when grown without any pesticides (Branch and Fletcher, 2001), Georgia-01R was found to have comparable or better resistance to early and late leafspots [caused by Cercospora arachidicola Hori and Cercosporidium personatum (Berk. & Curt.) Deighton, respectively] and TSWV as ‘Southern Runner’ (Gorbet et al., 1987) and ‘Florida MDR 98’ (Gorbet and Shokes, 2002). Georgia-01R also produced significantly higher yields and dollar values without pesticides as compared to these other multiple resistant cultivars, and when grown with recommended pesticides, Georgia-01R was found to be comparable to ‘Georgia Green’ (Branch, 1996) in TSWV resistance, pod yield, total sound mature kernel grade, and dollar value return per hectare. Preliminary field trials also shows Georgia-01R to have moderate resistance to white mold or stem rot (caused by Sclerotium rolfsii Sacc.), Cylindrocladium black rot (caused by Cylindrocladium parasiticum Crous, Wingfield & Alfenas), leafhoppers (Empoasca fabae Harris), and/or leaf scorch (caused by Leptosphaerulina crassiasca Sachet).

Georgia-01R has a spreading runner growth habit, tan testa color, and late maturity similar to Southern Runner, Florida MDR 98, and ‘C-99R’ (Gorbet and Shokes, 2002). Maturity is approximately 2 to 3 wk later for Georgia-01R than for Georgia Green in southern Georgia.

Georgia-01R has dark green foliage, prominent mainstem, and alternate branching pattern. Georgia-01R also has a significantly greater pod bulk density (346 vs. 316 kg m^-3), more pronounced pod reticulation and constriction, approximately 10% more jumbo runner seed (riding a 8.33- by 19.05-mm slotted screen), significantly lower oil content (46 vs. 49%), and significantly higher oleic to linoleic fatty acid ratio (3.1 vs. 2.3) than C-99R. However, it is not significantly different from C-99R in number of sound mature seed count, blanchability, protein content, and roasted peanut flavor scores.

U.S. Plant Variety Protection is pending for Georgia-01R. Breeder seed of Georgia-01R will be maintained by the University of Georgia, Coastal Plain Experiment Station at Tifton. Foundation seed stock will be available from the Georgia Seed Development Commission, 2420 S. Milledge Avenue, Athens, GA 30605.

NOTES

Registration by CSSA.

Accepted for publication March 31, 2002.

REFERENCES

• Branch, W.D. 1994. Registration of ‘Georgia Browne’ peanut. Crop Sci. 34: 1125–1126.[Free Full Text]
• Branch, W.D. 1996. Registration of ‘Georgia Green’ peanut. Crop Sci. 36:806.[Free Full Text]
• Branch, W.D., and S.M. Fletcher. 2001. No-pesticide preliminary yield trials in peanut. Peanut Sci. 28:21–24.
• Branch, W.D., J.S. Kirby, J.C. Wynne, C.C. Holbrook, and W.F. Anderson. 1991. Sequential vs. pedigree selection method for yield and leafspot resistance in peanut. Crop Sci. 31:274–276.[Abstract/Free Full Text]
• Gorbet, D.W., A.J. Norden, F.M. Shokes, and D.A. Knauft. 1987. Registration of ‘Southern Runner’ peanut. Crop Sci. 27:817.[Free Full Text]
• Gorbet, D.W., and F.M. Shokes. 2002. Registration of ‘Florida MDR 98’ peanut. Crop Sci. 42(6):(in press).
• Gorbet, D.W., and F.M. Shokes. 2002. Registration of ‘C-99R’ peanut. Crop Sci. 42(6):(in press).

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