| In this final progress report, the author explains that five advanced breeding lines, generated from a cross between Florida MDR 98 and a Bolivian land race, Bayo Grande, were selected as having the highest levels of pest resistance and yield from among 527 lines generated from individual plant selections between 1999 and 2005.
Two of the five advanced lines were evaluated in the Uniform Peanut Performance Tests and Cultivar Tests in Georgia, Florida and Alabama for each of the three years previous to the report. One line, CRSP 14, was selected for submission as a new cultivar and, at the time of the report, was under consideration by the UGA College of Agriculture Cultivar Release Committee.
Yields, grades and resistance were evaluated in numerous tests in Georgia, Florida and Alabama, with all breeding lines showing good to very good resistance to a number of important southeast region disease and insect pests. Early leaf spot resistance was good to excellent, late leaf spot resistance was good, and initial tests also showed promising resistance to cylindracladium black rot and white mold.
Tomato Spotted Wilt Virus (TSWV) resistance was comparable to C99R and several newer Florida and Georgia releases. The average yields of this breeding line exceeded Georgia Green by 47 percent in sprayed tests and 83 percent in non-sprayed tests. Several elite lines also showed usable resistance to leaf hopper and three-cornered alfalfa hopper, then emerging as significant threats to southeastern peanut.
In a fungicide spray regime test conducted to evaluate disease resistance in 10 advanced candidate breeding lines, levels of early and late leaf spot levels were moderate. Yields were not significantly reduced by as few as two applications compared to four, but were adversely affected by TSWV in the more susceptible lines.
Thirty-six advanced lines, along with 619 individual plant selections from promising F3 and F4 lines, were selected for further testing in 2007. An F3 nursery of material from 12 new crosses of high oleic and high pest-resistant parents went to Tifton for evaluation of TSWV resistance and yield. Several very promising candidate lines were selected and evaluated for grade and other post-harvest quality factors, producing normal readings for oil content, taste, blanching and roasting qualities, and other variables of commercial interest.
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