Regeneration of cereals

Seed dormancy

Cultivated cereals: none.
Wild cereals: fresh seeds may germinate irregular or not at all. In many cases germination is normal after a storage period of about a year. For some accessions this period is longer.

Vernalization

Cultivated winter cereals are sown in October and are vernalized under natural conditions in the field during the winter.
Winter type wild cereals are sonw in trays in January and after germination the trays are placed in a cold chamber (5°C) for at least six weeks.

Crop phenology


Phen cereals.jpg

Sowing

Winter types (barley, wheat): October.
Spring types (barley, wheat, oats): March.

Seeds are sown at a density of 350-400 seeds per m2, with 1 m2 sown. The distance between the rows is 20-25 cm.

Wild cereals are sown (spring types) or planted (winter types) in soil in the greenhouse, 30-64 plants per accession and are supported by 2-4 rings with 30 cm in diameter. During flowering, the ears are wrapped up in perforated polythene bags in order to collect the seeds which scatter as soon as ripe.

The sample plots are separated by a path of appr. 80 cm.

Harvesting

Winter types: July.
Spring types: August.

The seeds of cultivated cereals are harvested using a small combine, stored in bags together with the filednumber and pre dried on a drying floor. Accessions with plants which do not ripen at the same time are harvested twice manually. The wild species are harvested by hand by cutting the ears, wrapped up in the bags ahnd predried on a drying floor or drying chamber.

Pest and disease control

Preventive: Seed treatment against soil pathogens

Non-preventive: Mildew (Erysiphe graminis)