• KOREAN JOURNAL OF CROP SCIENCE
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• v.55 no.3
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• pp.245-252
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• 2010

The objective of this study was to obtain the basic informations on variability of germplasm and cultivation practice for the production of biodiesel in sunflower. A total of 275 accessions obtained from the National Agrobiodiversity Center (34 landraces from Korea, 219 and 22 introductions from America and other countries, respectively) were screened to evaluate variations of seed characteristics, oil content and fatty acid composition. Seed types were classified into 4 types (broad ovoid, narrow ovoid, rounded and elongated). The broad ovoid type was the highest proportion of 40.4%, while the elongated type was the lowest proportion of 5.0% among accessions. Also, the seed colors were classified into 4 colors (gray, brown, black and white). Gray and brown seed color showed the highest distribution and white seed color showed the lowest among accessions, respectively. Hundred and one liter seed weight ranged 2.9~15.5g and 178~439g with averages of 6.3g and 322.0g, respectively. Oil content ranged from 11.7% to 45.6% with an average of 25.5%. The frequency distribution of oil content showed the highest in range of 22~28% and the lowest in range of over 40%. Three promising accessions with higher oil content than 40.0% were IT031967, IT031970 and IT031965 introduced from America. Palmitic and stearic acid contents, saturated fatty acid, ranged 3.1~7.6% and 1.3~4.1% with averages of 4.7% and 2.2%, respectively, and a total content of saturated fatty acid ranged 5.4~9.4% with an average of 6.9%. Oleic and linoleic acid contents, unsaturated fatty acid, ranged 18.1~75.7% and 18.1~74.1% with averages of 55.2% and 38.0%, respectively. Five accessions, IT031831, IT031669, IT031895, IT031938 and IT031694, showed higher oleic acid content than 70%. A total content of unsaturated fatty acid ranged 89.6~94.8% with an average of 93.0%.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.52 no.3
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• pp.239-248
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• 2007

Although high nutritional values and continuous identification of important functional substances of soybean [Glycine max (L.) Merrill.] promote consumption of soybean products worldwide, informations on quality of brand soybean is not enough for consumers. Total of 100 brand soybeans [32 for soypaste and source, 45 black testa (lage), and 17 black testa (small) or medicinal soybean and beansprout soybean] were collected at supermarkets and several external quality factors were analyzed. Brand soybeans were marked with the environmental friendly and intimating words along with soybean (white or yellow), black soybean (black-, frost-, late frost-, green or inner-green-), medicinal soybean and beansprout soybean. Among 100 brand soybeans 30% was 1 kg package and 59% was 500 g package, difference between printed and actual weights of 70% brand soybeans was ${\pm}1%$ and weights of 2/3 of brand soybeans were higher than printed weight. Range of 100 seed weights of soypaste and source, black testa (large) and black testa (small) and beansprout soybeans were $23.7{\sim}47.8g$, $21.9{\sim}44.5g$ and $9.5{\sim}15.0g$, respectively. Although ranges of 100 seed weights of soypaste and source and black testa (large) soybeans were similar, 63% of soypaste and source were less than 29 g, while 78% of black testa (large) soybeans were higher than 30 g. Although average and highest percentages of seeds separated with 6.7 mm sieve were similar with 87.4% and 99.9% for soypaste and source soybean and 86.5% and 99.5% for black testa (large) soybean, respectively, the lowest percentages were 70.7% for soypaste and source soybean and 14.4% for black testa (large) soybean. When 100 seed weight was greater than 35 g, 90% of seeds were remained on 6.7 mm sieve. On the other hand 100 g weight and percentage of seeds remained on 6.7 mm sieve showed significantly positive correlations [r=0.7488** for soypaste and source soybean and r=0.7874** for black testa (large) soybean when 100 seed weight was $20{\sim}30g$. Based on hilum color and/or appearance, 76% of brand soybeans collected (more than 90% in yellow testa soybeans) were found to be mixed more than 10% with other cultivars or landraces. Foreign materials such as sand, piece of clothe, wood piece, dead insects, other soybeans were found in 20% of brand soybeans. Average test weight of brand soybeans was 762g $L^{-1}$ with a range of $645{\sim}820g\;L^{-1}$. Soybeans from local markets were as good as brand soybeans in 100 seed weight, uniformity of seeds, weight of foreign materials and test weight.