Seed Concerns – Self-Pollinated Species

Harold Bockelman

National Small Grains Collection

The National Small Grains Collection•Predominantly self-pollinated

•More than 95% of the 128,855 accessions are self-pollinated

•Exceptions are Secale (rye), Aegilops, and some Hordeum species

NSGC Regeneration Locations

Aberdeen, ID spring planting spring habit: barley oat wheat triticale rye

fall planting winter habit: wheat triticale rye

Parlier, CA fall planting winter habit: barley

facultative, mixed, and unknown habits

Stuttgart, AR spring planting rice (up to 130 days to maturity)

Puerto Rico winter planting rice (>130 days – daylength sensitive types)

Greenhouses winter planting wild species; critical inventory and viability

summer planting Oryza species

Accession Guard Accession GuardGuard Accession Guard Accession

Accession Guard Accession GuardGuard Accession Guard Accession

Accession Guard Accession GuardGuard Accession Guard Accession

Accession Guard Accession GuardGuard Accession Guard Accession

Accession Guard Accession GuardGuard Accession Guard Accession

Accession Guard Accession GuardGuard Accession Guard Accession

NSGC Field Design

Maintaining the Integrity of Accessions

•Heterogeneous Accessions

•Population Size

•Seed Viability

•Good descriptor data

•Field design

•Quality control at all stages

What about a predominantly self-pollinating species that exhibits 5% outcrossing?

•Distance

•Placement

•Bagging