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David H. Byrne Department of Horticultural Sciences Texas A&M University College Station, TX 77843-2133
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Texas A&M University Vegetables and Fruits in your diet Decrease the chances of having a heart attack or stroke Lowers blood pressure
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Texas A&M University Probably lowers the risk of cancers of the Esophagus Stomach Lung Possibly reduces the risk of cancers of the Mouth, pharynx, larynx Colon-rectum Kidney and urinary bladder International Agency for Research on Cancer, World Health Organization, Monumental review of the best research on fruits and vegetables and their effect on cancer incidence
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Grape Pomengranate Blueberry Peach Plum Apple Strawberry
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CropWangVinsonSun Strawberry10060 Red grape5010060 Plum6331 Peach-1050 Blueberry-81 Apple1541100 Wang et al., 1996; Vinson et al., 2001; Sun et al., 2002
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Germplasm Differences among genotypes within a crop? Genetic manipulation Target trait? Genetic control and breeding approach Cultivar testing and release
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Texas A&M University
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Conner et al., 2002
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Cevallos-Casals et al., 2006; Vizzotto et al., 2007; Byrne et al., 2009
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Conner et al., 2002
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Cevallos-Casals et al., 2006; Vizzotto et al., 2007; Byrne et al., 2009
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Conner et al., 2002
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Cevallos-Casals et al., 2006; Vizzotto et al., 2007; Byrne et al., 2009
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Germplasm Differences among genotypes within a crop? Antioxidant activity Total phenolics Anthocyanins
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Cardiovascular health LDL inhibition Platelet aggregation Cancer proliferation - in vitro assays Breast cancer Colon cancer Prostate cancer
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Peaches and nectarinesPlums Byrne et al., 2009. Health benefits of peaches and plums. Acta Hort. 841:267-274.
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Peaches and nectarines Plums Byrne et al., 2009. Health benefits of peaches and plums. Acta Hort. 841:267-274.
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Germplasm Differences among genotypes within a crop? Genetic manipulation Target trait? Genetic control and breeding approach Cultivar testing and release
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Antioxidants Phenolics Anthocyanins LDL oxidation Inhibition of cancer proliferation
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Scientific Relevance of in vitro tests to human health? Which phenolics are important? Bio-availability? Concentration needed to deliver health benefits? Stability of trait over growing/processing conditions? Marketing Will it sell? Finley, 2005. Chronica Hort. 45:6-11; Sloan, 2008. Food Technology 4:25-44.
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Germplasm Differences among fruit crops? Differences among genotypes within a crop? Genetic manipulation Target trait? Genetic control and breeding approach Cultivar testing and release
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Blueberry genetics Moderate heritability AOA, 0.43 TPH, 0.46 ACY, 0.56 Conner et al., 2002. J. Amer. Soc. Hort. Sci. 127:82-88 Vizzotto et al, 2006; Chang et al., 2000
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High correlation between AOA and total phenolics Potential to use TPH as selection criteria Phenolics and sensory characteristics Browning and peaches Level of phenolics and polyphenol oxidase Flavor? Conner et al., 2002. J. Amer. Soc. Hort. Sci. 127:82-88 Vizzotto et al, 2006; Chang et al., 2000
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Environmental Effect Ranking of genotypes same GxE = Genetic x Environmental Effect Ranking of genotypes differ with environment Conner et al., 2002. J. Amer. Soc. Hort. Sci. 127:82-88; 89-97 Vizzotto et al, 2006; Chang et al., 2000
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Environmental Effect Ranking of genotypes same GxE = Genetic x Environmental Effect Ranking of genotypes differ with environment Conner et al., 2002. J. Amer. Soc. Hort. Sci. 127:82-88; 89-97 Vizzotto et al, 2006; Chang et al., 2000
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Selection needs to occur over several environments Years Locations Select for consistency over environments
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Traditional breeding Recurrent mass selection Cost of screening? Other approaches Marker assisted selection? Transformation?
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Germplasm Differences among genotypes within a crop? Genetic manipulation Target trait? Genetic control and breeding approach Cultivar testing and release
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