pnut pnut Peanut Science 0095-3679 0095-3679 American Peanut Research and Education Society 10.3146/i0095-3679-11-2-1 Articles Heterosis of Apparent Photosynthesis Rate in Arachis hypogaea L.1 W. D. Branch and J. E. Pallas Jr. 2 Assistant Geneticist, Dept. of Agron., Coastal Plain Exp. Stn., Tifton, GA 31793 and Plant Physiologist, USDA-ARS, Southern Piedmont Cons. Res. Center, Watkinsville, GA 30677

1Contribution of the University of Georgia, College of Agriculture and the U. S. Dept. of Agriculture, Agric. Research Service. Mention of a trademark, proprietary product, or vendor does not constitute a guarantee or warranty of the product by the UGA or USDA and does not imply its approval to the exclusion of other products that may be suitable.

 7 1984 11 2 56 57 30 6 1984 American Peanut Research and Education Society 1984 American Peanut Research and Education Society Abstract

Complete diallel crosses were made among three parental peanut (Arachis hypogaea L.) genotypes to gain a better understanding of photosynthetic inheritance. Highly controlled environmental conditions were used throughout the study to determine apparent photosynthetic rates. Results indicated significant differences among parents and F1 hybrids. Reciprocal differences were also observed between certain cross combinations. Dominance and overdominance effects were found under these test regimes which suggest a heterotic response for this important characteristic.

 Key Words Peanut; , groundnut; , dominance; , overdominance