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REGISTRATIONS OF CULTIVARS

Registration of ‘OLin’ Peanut

^a Texas Agric. Exp. Stn., Stephenville, TX 76401
^b Soil & Crop Sci. Dep., Texas Agric. Exp Stn., Texas A&M Univ. College Station, TX 77843
^c Texas Agric. Exp. Stn., Lubbock, TX 79403
^d USDA-ARS, Stillwater, OK 74074
^e Soil & Crop Sci. Dep., Texas Agric. Exp. Stn., Lubbock, TX 79403
^f Oklahoma State Univ., Stillwater, OK 74074

^* Corresponding author (c-simpson{at}tamu.edu)

‘OLin’ (Reg. no. CV-75, PI 631176) is a Spanish market-type peanut (Arachis hypogaea L. subsp. fastigiata Waldron var. vulgaris Harz.) cultivar with a high oleic (O) and low linoleic (L) fatty acid ratio and good yield potential. The new variety was tested as Tx962120 and was released by the Texas Agricultural Experiment Station in January 2002. A joint release has been approved by the Oklahoma Agricultural Experiment Station and approval of the joint release by the USDA-ARS is expected.

OLin was derived as a single plant selection from a first backcross with ‘Tamspan 90’ (Smith et al., 1991) as the recurrent parent and UF435-1 (Norden et al., 1987), the donor of the high O/L genes. The first cross was made in 1991 and the subsequent backcross in 1992. Individual plant selections were made in 1995 from the BC₁F_4:5 population based on plant and pod type, selections were planted in the greenhouse in early 1996 (BC₁F_5:6), and progeny rows were field planted later in 1996. This increase was used to conduct the first O/L analysis and the first yield test in 1997. From the 1999 yield test (BC₁F_5:9), 820 seed were tested for O/L ratio, 239 high O/L individual plants were harvested and progeny rows were grown in the 1999-2000 Puerto Rico winter increase nursery. The increase resulted in 240 kg of Breeder seed (BC₁F_5:11) which were later planted near Vernon, TX, during the summer of 2000 as Foundation seed production.

OLin has plant size equal to Tamspan 90. The main stem is semiapparent at most locations and seeding rates. The lateral branching is sparse, similar to Tamspan 90, and the branching pattern is mostly sequential. Leaf color is light green, also similar to Tamspan 90 (RHS 146A). Pods of OLin are similar in size and shape to Tamspan 90, mostly two-seeded (up to 1% three-seeded pods). Pod constriction between the seeds is slight, similar to Tamspan 90.

In 28 tests from 1998 to 2000, OLin averaged 10% lower yield than Tamspan 90 in Central Texas, West Texas, and Southwest Oklahoma. Total sound mature kernels (TSMK) were equal between OLin and Tamspan 90 in these tests (68.7 vs. 68.4%) as were 100-seed weights (43.7 vs. 43.6 g). In shelling tests, OLin was not significantly different (P > 0.05) from Tamspan 90 in jumbo or no. 1 seed size distribution. Splits, other kernels, damage kernels, and oil stocks were equal to Tamspan 90.

Quality analyses indicated no significant difference between OLin and Tamspan 90 except in O/L ratio (22.4:1 vs. 1.15:1) and iodine number (77.5 vs. 102). Other traits found to be equal were oil content (44.16%), protein content (29.49%), flavor, and blanchability. Disease ratings indicate that OLin has a good level of the same disease-tolerant attributes as Tamspan 90 [e.g., pod rot (caused by Sclerotinia minor Jagger and/or Pythium myriotylum Drechs.)] (Smith et al., 1991).

The OLin cultivar was developed and released under a license agreement between the University of Florida Research Foundation and The Texas Agricultural Experiment Station. Application (PVP no. 200200149) has been made for U.S. Plant Variety Protection. The cultivar must be sold as a class of Certified seed, by variety name only. Foundation seed of OLin will be maintained by Foundation Seed Service, Texas Agric. Exp. Stn., Texas A&M Univ. Agric. Res. and Ext. Ctr., Vernon, TX 76384. Small samples of seed for research purposes may be obtained from the corresponding author for a period of 5 yr.

ACKNOWLEDGMENTS

Appreciation is expressed to the Texas Peanut Producers Board and the Oklahoma Peanut Commission for their support of this research. ‘OLin’ was named to honor the memory of Dr. Olin D. Smith, Peanut Breeder at Texas A&M University, Soil and Crop Science Dep. 1970-1999.

NOTES

Registration by CSSA.

Accepted for publication February 28, 2003.

REFERENCES

• Norden, A.J., D.W. Gorbet, D.A. Knauft, and C.T. Young. 1987. Variability in oil quality among peanut genotypes in the Florida breeding program. Peanut Sci. 14:7–11.
• Smith, O.D., C.E. Simpson, W.J. Grichar, and H.A. Melouk. 1991. Registration of ‘Tamspan 90’ Peanut. Crop Sci. 31:1711.[Free Full Text]

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