A sample of seeds was analyzed using two mass spectrometers connected by a chamber called a collision cell, in which the seeds' molecules were shattered into fragmentation ions.
In his stunning Seed Cathedral (above) for Shanghai's 2010 World Expo, the Union Jack is there, but you'll find it shrouded in the building's 66,000 fiber-optic rods, each embedded with a sample of seeds at the tip supplied by the Kew Royal Botanic Gardens (who gave 250,000 seeds in all).
The latter was determined on a sample of seeds, one spike in the glasshouse or 1,000 seeds from all spikes in each 1×1.08 m plot in the field.
The heterogeneity occurs in a sample of seeds from a pure line (due to nongenetic factors) and a segregating (e.g., F2) population (due to both genetic and nongenetic factors).
You can estimate average seed size by counting and weighing a sample of the seed lot then dividing the weight by the number.
Government testing found a sample of sold seed which contained GM papaya.
AN was quantified by the mean awn length and percentage of seeds with awn for a sample of ~50 seeds from a plant.
In addition, for each accession, the average and variance of seed weight was determined on a sample of twenty seeds.
Tests of twenty seven unique configurations were conducted with a sample of three hundred seeds.
After harvesting of mature cones, a sample of 30 seeds of each of three Pinus species (P. radiata, P. patula Schiede ex Schltdl. & Cham. and P. pinaster Aiton) were scanned together in one microCT scan, and the same seed was allowed to germinate on moist filter paper after scanning.
The analysis was based on a sample of 10 seeds from five lines each of S2, E2 and E3 and two S3 lines.
