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International Journal of Agronomy
Volume 2013 (2013), Article ID 975701, 5 pages
http://dx.doi.org/10.1155/2013/975701
Research Article

Diallel Anaysis of Oil Production Components in Peanut (Arachis hypogaea L.)

1Texas A&M AgriLife Research, Texas A&M System, College Station, TX 77843, USA
2Texas A&M AgriLife Research, Texas A&M System, Lubbock, TX 79403, USA
3Texas A&M AgriLife Research, Texas A&M System, Stephenville, TX 79401, USA

Received 19 May 2013; Accepted 3 August 2013

Academic Editor: Othmane Merah

Copyright © 2013 Jeffrey N. Wilson et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Peanut (Arachis hypogaea L.) has the potential to become a major source of biodiesel, but for market viability, peanut oil yields must increase. Oil yield in peanut is influenced by many different components, including oil concentration, seed mass, and mean oil produced per seed. All of these traits can potentially be improved through selection as long as there is sufficient genetic variation. To assess the variation for these traits, a diallel mating design was used to estimate general combining ability, specific combining ability, and heritability. General combining ability estimates were significant for oil concentration, weight of 50 sound mature kernels (50 SMK), and mean milligrams oil produced per SMK (OPS). Specific combining ability was significant for oil concentration. Reciprocal effects were detected for OPS. Narrow-sense heritability estimates were very high for oil concentration and 50 SMK and low for OPS. The low OPS heritability estimate was caused by the negative correlation between oil concentration and seed size. Consequently, oil concentration and seed mass alone can be improved through early generation selection, but large segregating populations from high oil crosses will be needed to identify progeny with elevated oil concentrations that maintain acceptable seed sizes.