The estimation of oil percentage in safflower seed and the association of oil percentage with hull and nitrogen percentages, seed size, and degree of spininess of the plant

Claassen, C.E.; Ekdahl, W.G.; Severson, G.M.

The estimation of oil percentage in safflower seed and the association of oil percentage with hull and nitrogen percentages, seed size, and degree of spininess of the plant

1950

Claassen, C.E. | Ekdahl, W.G. | Severson, G.M.

The relationship between the oil percentage of the seed to oil percentage in kernel, hull and nitrogen percentages of seed, seed size, and degree of spininess of the plant were determined. The following statistically significant correlations were obtained: oil and hull percentage of the seed -0.77 and -0.81, oil and nitrogen percentage of seed -0.34, oil percentage of seed and seed size 0.22, oil percentage of seed and degree of spininess of plant 0.20. Oil percentage of kernel was found to be positively associated with oil percentage of whole seed and with seed size. Two methods of estimating oil percentage in seed were investigated. One method was based on a simple external examination of seed. The other method was based on general appearance of a finely crushed 2 gram sample of seed. Correlations of 0.93 and 0.90 were obtained between the estimated and actual oil percentage for the two methods, respectively. Approximately 75% of the samples were estimated within 2% of the actual oil percentage. These results show that estimation of oil percentage is of value in eliminating low oil selections before any chemical analyses are made in breeding material.

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