The following section is taken from the DSIRCrop Research publication booklet entitled "Identification of New Zealand Wheat Cultivars"
To enable accurate identification a minimum of thirty sound plump grains is required to cover variation. As grain character states are continuous in expression any attempt to identify a cultivar on a small sample or by observing only one or two states may be misleading. The examiner must build up a complete picture of the cultivar and not concentrate attention on a single grain which may be atypical.
Where there is a range of expressions in a character state, the dominant state is listed first in the description. For example "grain shape: ovate to oval" indicates that most of the grains have an ovate shape.
Options:White /Red /Purple
Grain colour is the major key to wheat identification. This gives an immediate separation into one of three distinct groups. Within one colour, i.e red wheats, colour is not a reliable character for separation of cultivars. Most of the New Zealand commercial wheats are red, and further divisions of paleness or darkness are indicated in the grain descriptions.
Brush hair length
Brush hair length is viewed from the top or side of the grain. Short hairs are usually barely visible to the naked eye, long hairs are at least 1mm long. Brush hair length is a consistently good identification characteristic for New Zealand wheat cultivars unless the grain has had much handling
Brush end profile
The profile of the brush end is viewed either from the top or the side of the grain. The character is related to the shape of the back and the base at this end of the grain, and to overall grain shape. For example a curved back and ovate shape will result in a pointed brush end.