Identification of seeds or plants using phenotypic markers

A method of generating seeds of a cultivar that are homozygous and heterozygous for coat color, the method comprising:

• mixing herbicide resistant, secondary colored seed coat seeds, with non-herbicide resistant primary colored seed coat seeds to form a first seed mixture;
• planting said first seed mixture in a field;
• bulk harvesting the field to produce a second seed mixture;
• planting the second seed mixture;
• spraying the field with the herbicide for which herbicide resistance exists for the herbicide resistant seeds;
• harvesting the remaining seed to produce a herbicidally culled seed mixture;
• separating, in the herbicidally culled seed mixture, seeds with primary colored seed coat from the other seeds, through the use of a color sorter;
• and
• retaining the separated primary color seeds, which are homozygous and heterozygous for coat color.