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Title: DEVELOPING HIGH O/L PEANUT (ARACHIS HYPOGAEA L.) CULTIVARS FOR THE SOUTHWEST

Author
item SIMPSON, C
item SCHUBERT, A
item BARING, M
item LOPEZ, YOLANDA
item Melouk, Hassan
item KEIM, K

Submitted to: American Peanut Research and Education Society Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: 6/15/2001
Publication Date: 3/1/2002
Citation: Simpson, C.E., Schubert, A.M., Baring, M.R., Lopez, Y., Melouk, H.A., Keim, K.E. 2002. Developing high O/L peanut (Arachis hypogaea L.) cultivars for the southwest [abstract]. Proceedings of the American Peanut Research and Education Society, July 17-20, 2001, Oklahoma City, OK. 33:59.

Interpretive Summary:

Technical Abstract: The agencies listed above and the Texas Peanut Producers Board and the Oklahoma Peanut Commission initiated a program in 1996 to develop high O/L ratio peanut cultivars for the Southwestern Peanut Production area. The source for the high O/L genes was UF435-1 and UF435-2 for the Spanish materials and SunOleic 95R for the runner lines. Four backcrosses have been made on the Spanish materials, with selections being made from each backcross cycle. Two, and in some cases three, backcrosses were made in the runner materials. Numerous selections were tested for O/L ratio, either on an individual seed basis or a composite sample of five or more seeds. The single seed testing was a non-destructive method so the seed could be tested and also planted for increase. Hundreds of lines of the Spanish and runner types were increased either in greenhouses, field nurseries in Texas or in field nurseries in Puerto Rico. Of tested lines, some have surfaced as being the best in specific traits. It has been difficult to identify Spanish lines that had yield and grade (TSMK) as high as the recurrent parent, Tamspan 90, but also containing the high O/L genes. Most often those lines with O/L readings above 15 to 20 were among the lowest in replicated tests in yield and grade. In reverse, those lines with highest yield and/or grade were lines with low O/L ratios. One BC1 Spanish lines has been identified as having the best potential for variety release pending selection of better lines from more advanced generations. This line is being seed increased for possible release in late 2001. Runner lines with desirable yield and grade have been relatively easier to select than the Spanish. Many high yielding lines with acceptable grade have been identified with a high O/L ratio. At present we are seed increasing one primary line and one secondary line.