고라이신(QPM) 주요 계통과 교잡계의 생육특성 및 아미노산 조성 변이

• 영문명: Growth Characteristics and Variation in Amino Acids Composition of Quality Protein Maize Lines
• 발행기관: 한국작물학회
• 저자명: 배환희(Hwan-Hee Bae) 손범영(Beom-Young Son) 고영삼(Young-Sam Go) 박혜영(Hye-Young Park) 이기범(Gibum Yi) 하준영(Jun Young Ha) 김미정(Mi-Jung Kim) 김선림(Sun-Lim Kim) 백성범(Seong-Bum Baek)
• 간행물 정보: 『한국작물학회지』제65권 제3호, 222~230쪽, 전체 9쪽
• 주제분류: 농수해양 > 기타농수해양
• 파일형태: PDF
• 발행일자: 2020.09.30

영문 초록

Maize grain quality can be improved by raising lysine content, which is an essential amino acid present in insufficient quantities in normal maize. Maize varieties with such modifications are known as quality protein maize (QPM). To date, no Korean maize cultivars contain high amounts of lysine. To introduce quality protein maize to Korean cultivars, we crossed QPM CIMMYT maize lines (CML) with KS140, an elite inbred line used as a parent of several cultivars such as ‘Gangdaok’ and ‘Pyeonganok’. We analyzed the phenotypic characteristics of F1 plants as well as the protein contents, amino acids, and fatty acids profiles of the self-pollinated seeds of the F1 hybrids, and evaluated the feasibility of CML as a source of QPM. Days to anthesis of the CML ranged from 78 to 90 days after planting (DAP), whereas a range of 81~87 was recorded for F1 hybrids. The average days to anthesis was 85 for KS140, CML, and the F1 hybrids. The protein content of the CML was measured to be between 9.1 and 12.1%, with the highest and lowest values being recorded in CML153 and 191, respectively. The F1 hybrids had protein contents of 9.1~11.1%, and the highest content was observed in KS141/CML188. The fatty acids profiles were very similar across all analyzed maize samples, and linoleic acid (C18:2) composed the greatest proportion. Glutamic acid made up the largest proportion of amino acids in all maize samples. Lysine composition was highest in CML155 (6.92% of all amino acids), with an average composition of 4.83% across the CML. In contrast, KS140 showed a lysine content of 2.51%. In F1 hybrids, the average lysine composition was 3.46%, and KS140/CML164 (4.18%) and KS140/CML163 (4.99%) contained more lysine than either parent. Taken together, these results indicate that CML could become promising QPM sources to improve grain quality in Korean maize cultivars.

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키워드

amino acid lysine opaque-2 protein quality protein maize (QPM)