Quality changes occurring in stored solin, high linolenic acid and standard flaxseed (Linum usitatissimum L.)

Changes occurring in stored solin/flax cultivars over 6 mo at temperatures ranging from 10 to 35 degrees C and moisture contents of 8.0, 9.5, 11.0 and 12.5% were observed. The cultivars were NorLin, McGregor, FP1001 (high lin olenic acid), Linola(TM) 947 (solin) and Linola(TM) 989 (solin). Oil compos ition in all cultivars changed only slightly over 6 mo with a significant i ncrease in palmitic acid. Doubling of free fatty acid levels was considered an indicator of quality deterioration. The deterioration occurred in 6 mo at 8% MC and 20 degrees C in FP1001 and in NorLin, McGregor, and Linola(TM) 947 at 25 degrees C; Linola(TM) 989 could be stored at 30 degrees C. Linol a(TM) 989 could be safely stored at moderately higher temperatures at a giv en moisture level than Linola(TM) 947. Visible mold with corresponding germ ination loss was usually associated with Aspergillus glaucus group infectio n. Stored-product insects that could survive and develop on the solin/flax were the red flour beetle, Tribolium castaneum (Herbst), the confused flour beetle, T, confusum J. du Val, the sawtoothed grain beetle, Oryzaephilus s urinamensis (L.) and the merchant grain beetle, O. mercator (Fauvel). In general, Linola(TM) 947 and FP1001 were slightly more difficult to store than the other cultivars but there was no consistent difference between so lin and flaxseed.