Influence of Seeding Rate upon Seed and Oil Yield and Their Components in Flax
1973
Albrechtsen, R. S. | Dybing, C. D.
SummaryFive cultivars of flax (Linum usitatissimum L.) were each seeded at four rates to determine the influence of seeding rate on seed and oil yields, their components, and other plant and seed characteristics. A path coefficient analysis technique was employed to partition yield components into direct and indirect effects to assess the usefulness of yield components as selection criteria in a flax breeding program. Rates of seeding that were used in the study gave 0.8, 1.6, 2.8, and 3.9 viable seeds per cm of row. Seed yield, oil yield, oil content, iodine value, seed size, seeds per boll, bolls per area, and test weight were not significantly affected by variations in seeding rate. Bolls per plant and height were decreased and maturity was hastened by increased seeding rate. Approximately 85% of the variation in oil yield could be attributed to variation in bolls per area, seeds per boll, seed size, and percent oil. Stand accounted for only an additional 1% of the variation in oil yield. Path coefficient analysis showed bolls per unit area to be the most important component determining seed and oil yields, both directly and indirectly. Seeds per boll, seed size, and percent oil showed nonsignificant and negative correlations with oil yield, because the positive direct effects they exerted on yield were canceled by negative indirect effects through other components.
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