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REGISTRATIONS OF GENETIC STOCKS

Registration of Lutescent-Leaf Peanut Genetic Stock

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

^* Corresponding author (wdbranch{at}tifton.uga.edu)

Lutescent-Leaf peanut (Arachis hypogaea L. subsp. hypogaea var. hypogaea) genetic stock (Reg. no. GS-9, PI 641768) was released by the Georgia Agricultural Experiment Stations in 2005. It originated as an off-type plant in the F₉ advanced Georgia peanut breeding line, GA 931307. Neither parent [‘Georgia Runner’ (Branch, 1991) x ‘Southern Runner’ (Gorbet et al., 1987)], early segregating progenies, or previous years of testing GA 931307 showed this distinct leaf characteristic. So, it is assumed that Lutescent-Leaf arose as a spontaneous mutation.

Lutescent-Leaf has an unusually bright yellow leaf color. It differs from other chlorophyll-deficient mutants in that Lutescent-Leaf fully develops to maturity under direct sunlight. Lutescent-Leaf is readily apparent at the early seedling stage. Younger age leaves and plants are more pronounced than older leaves and plants for the bright yellow color, which is opposite from the aureus mutant.

Lutescent-Leaf has a runner growth habit and medium maturity with nodules present on the roots, which distinguishes it from the yellowish leaves caused by non-nodulation mutants. It also has a tan testa color, large seed weight (about 85 g 100^–1 seed), and an oleic (C18:1) to linoleic (C18:2) fatty acid oil ratio of 1.7 to 1.

Crosses involving the Lutescent-Leaf mutant were made both within subspecies hypogaea and between subspecies hypogaea and fastigiata to determine its inheritance (Branch, 2001). Two complementary recessive genes, designated lut₁ and lut₂, were found controlling the Lutescent-Leaf trait. No maternal or cytoplasmic effects were detected among progenies from reciprocal crosses.

Geneticists or breeders can use this genetic stock as an unusual leaf marker in linkage or other genetic recombination studies. Limited quantities of seed are available of Lutescent-Leaf peanut genetic stock on written request from the corresponding author for the first 5 yr. Recipients of seed are asked to make appropriate recognition of the source of the genetic stock if it is used in the development of a new cultivar, germplasm, parental line, or another genetic stock.

NOTES

Registration by CSSA.

Accepted for publication December 31, 2005.

REFERENCES

• Branch, W.D. 1991. Registration of ‘Georgia Runner’ peanut. Crop Sci. 31:485.[Free Full Text]
• Branch, W.D. 2001. Inheritance of a lutescent-leaf color trait in peanut. J. Hered. 92:436–437.[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]

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