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Kil Sun Yoo,Haejeen Bang,Leonard Pike,Bhimanagouda S. Patil,Eun Jin Lee 한국원예학회 2020 Horticulture, Environment, and Biotechnology Vol.61 No.2
Plant pigments such as anthocyanins and carotenoids have been shown to be benefi cial to human health. Therefore, carrotlines of diff erent colors have been recently developed. This study aimed to characterize terpenoid, carotene, anthocyanin,and soluble solids content and antioxidant activity levels in orange, yellow, black, and purple carrots to develop new colorcarrot cultivars with more nutrients, health benefi ts, and consumer acceptance. Both individual and total terpenoid contentgreatly varied among breeding lines. Each line had a unique composition, and there was no general pattern between color andterpenoid content. Orange carrot roots had high levels of α-carotene, β-carotene, and total carotenoids compared with yellow. Red carrots were characterized by high lycopene content, and black carrots exhibited identical levels of lycopene content toyellow carrots. Leaf tissues contained lutein as the main carotenoid followed by β-carotene. There was no clear relationshipbetween leaf and root carotene profi les and content. Black and purple root colors were determined by composition and amountof anthocyanin compounds, and about fi ve major compounds were detected in this study. Total anthocyanin content was highin solid black carrots and decreased as the interior root color contained more yellow, with low and trace levels in purple andorange carrots, respectively. Soluble solid content ranged between 4.0 and 9.5 °Brix among lines. Anthocyanin content washighly correlated with antioxidant activity. Each color of carrot contained diff erent levels of the tested compounds and mayrequire extensive breeding to obtain desired levels.
Production of Doubled Haploid Onions (Allium cepa) and Evaluation of Their Field Performance
Sunggil Kim,Kil Sun Yoo,Leonard M. Pike 한국원예학회 2007 Horticulture, Environment, and Biotechnology Vol.48 No.3
Doubled haploid lines in onion (Allium cepa) are homozygous for all loci and can be used as valuable materials for inheritance studies of complex traits and pure line production for F₁ hybrid breeding. In this study, doubled haploid lines and their F₁ hybrids were produced and their field performance was compared with commercial open-pollinated cultivars. Six doubled haploid lines were produced from haploid culture. Four F₁ hybrids were produced by crossing doubled haploid lines with sterile breeding lines. Doubled haploid lines, F₁ hybrids, and five commercial open-pollinated cultivars were grown at two locations. After harvesting the bulbs, equatorial diameter, polar diameter, shape index, weight, soluble solid content, and pungency were measured. Doubled haploid lines and F₁ hybrids generally showed higher uniformity as compared with commercial cultivars for all traits. Hybrid vigor, a good response to favorable growing conditions, and high stability were observed in F₁ hybrids. Overall, it was demonstrated that doubled haploid lines were more uniform than open-pollinated cultivars and could be utilized as parental lines for F₁ hybrid production with high uniformity.
Sunggil Kim,Kil Sun Yoo,Leonard M. Pike 한국원예학회 2007 Horticulture, Environment, and Biotechnology Vol.48 No.4
Bulb color is an important trait in onion (Allium cepa) breeding, but the lack of a method to quantify red color intensity in a large number of samples has hindered assessment of essential breeding parameters such as heritability. We developed a new method based on digital imaging that allows facile quantification of red color intensity in a large number of samples. The brightness of dry skin in digital images was measured using the histogram function of Adobe<SUP>®</SUP> Photoshop<SUP>®</SUP> and showed highly significant correlation with both visual rating of red intensity and anthocyanin content. This method was utilized to assess the uniformity of red color intensity of doubled haploid (DH) lines and location effects on red color development. Three red DH lines, four pink F₁ hybrids, and three red commercial cultivars were grown at two locations with three replications. DH lines showed less variation of color intensity than commercial cultivars. A significant location effect on the red color intensity was observed in combined analysis of variance from two locations.
Designing Vegetables and Fruits for Improved Nutrition and Health – Calcium
Sunghun Park,Ning Hui Cheng,Jon K. Pittman,Kil Sun Yoo,Jungeun Park,Tae-Suk Kang,Chang-Kil Kim,Jeung-Sul Han,Sunggil Kim,Leonard M. Pike,Roberta H. Smith,Bhimanagouda S. Patil,Kendal D. Hirschi 한국원예학회 2006 한국원예학회 기타간행물 Vol.- No.-