Zea mays L. - VAAD

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CPVO-TP/002/3 FinalEnglishDate: 11/03/2010Ad. 30: Only varieties with ear type of grain: sweet or waxy: Ear: number of colours of grains1 2onetwoBicolour varieties have yellow and white grains on their ears. Cross pollination should be avoided particularly betweenwhite, bicolour and yellow grain coloured varieties.Ad. 33: Only varieties with ear type of grain: sweet: Grain: widthAd. 34: Ear: type of grain1 2 3 4 5 6 7flint flint-like intermediate dent-like dent sweet pop22
CPVO-TP/002/3 FinalEnglishDate: 11/03/20101 flint mostly hard endosperm, round grain, thick layer of hard endosperm on crown, largergrains than pop2 flint-like mostly hard endosperm, round grain, intermediate layer of hard endosperm oncrown3 intermediate thin layer of hard endosperm on crown, crown slightly indented4 dent-like mostly soft endosperm, crown moderately indented, medium layer of hardendosperm on dorsal side of grain,5 dent mostly soft endosperm covering also exterior part of crown, thin layer of hardendosperm only on dorsal side of grain, grain strongly indented on crown6 sweet glassy endosperm with very low or no starch content, wrinkled grain7 pop nearly completely hard endosperm, rice-type (pointed grain) or pearl type (roundedgrain), very thick layer of hard endosperm on crown, smaller grains than flint8 waxy approximately 100 % amylopectine, waxy appearance of grain, pink coloration ofendosperm in iodine staining test (blue black coloration of other types of grain).Iodine staining testwaxynon waxy9 flour completely soft endosperm, grain round or slightly indented on crownAd. 35: Only varieties with ear type of grain: sweet: Ear: shrinkage of top of grain1 3 5weak medium strongIn order to obtain uniform expressions of the grains on the ear, cross pollination between varieties should be avoided,e.g. by a special trial design. Cross pollination can cause irregular expressions of the grains and may lead to a wronginterpretation that the variety is not uniform.23
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Zea mays L. - VAAD

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