Submitted to: American Peanut Research and Education Society Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 5/5/2000
Publication Date: 7/13/2000
Citation: PATTEE, H.E., ISLEIB, T.G., GIESBRECHT, F.G., GORBET, D.W., CUI, Z. PARENT SELECTION FOR ROASTED PEANUT FLAVOR IMPROVEMENT USING BEST LINEAR UNBIASED PREDICTORS (BLUPS). PROCEEDINGS OF AMERICAN PEANUT RESEARCH AND EDUCATION SOCIETY. 2000. V. 32. p. 71.
Technical Abstract: Roasted peanut flavor is a characteristic that influences consumer acceptance. Certain sensory attributes of flavor have been shown to be heritable; thus care must be used in selecting parents to avoid degradation of flavor quality while improving agronomic performance or pest resistance. With a database of sensory attributes on 250 peanut cultivars and breeding lines, best linear unbiased prediction procedures were used to predict breeding values of parents for roasted peanut, sweet, and bitter attributes. The range of predicted breeding values for roasted peanut was -0.51 to +0.45 flavor intensity units (fiu), approximately twice the range of flavor intensity detectable to the palate. The range for sweet was -0.65 to +0.68 fiu; bitter -0.41 to +0.40 fiu. These values indicate there is genetic potential to improve flavor quality through breeding. Correlation between predicted and observed roasted peanut values was 0.79. However there was substantial variation among progeny in a hybrid population whose mean was well predicted. Parents with superior predicted breeding values for flavor quality included Sunrunner and its high-oleic backcross derivatives, Florunner, its component lines and progeny, and Spanish-type line Pearl. Parents with inferior predicted breeding values included: (1) Cylindrocladium-resistant lines, (2) ancestral line Jenkins Jumbo and its close relatives including Florigiant, and (3) ancestral line Improved Spanish 2B. The implications of these findings on flavor quality in current cultivars and breeding populations will be used to show the importance of flavor attributes as criteria in parent selection. Of particular interest are the deleterious effects of Jenkins Jumbo and Improved Spanish 2B in Virginia and the beneficial effect of Florunner in runner-type populations.