중만생 저아밀로스 다수성 벼 ‘정다미’

• 영문명: ‘Jeongdami’, a Mid-late Maturing, Low-amylose, High Yielding Rice (Oryza sativa L.) Cultivar
• 발행기관: 한국육종학회
• 저자명: 안억근(Eok-Keun Ahn) 강경호(Kyung-Ho Kang) 박향미(Hyang-Mi Park) 원용재(Yong-Jae Won) 정국현(Kuk-Hyun Jung) 현웅조(Woong-Jo Hyun) 이윤승(Yoon-Sung Lee) 김기영(Ki-Young Kim) 김미정(Mi-Jung Kim) 곽지은(Ji-Eun Kwak) 이상범(Sang-Beom Lee) 장경희(Kyeong-Hee Jang)
• 간행물 정보: 『한국육종학회지』Vol.57 No.1, 29~38쪽, 전체 10쪽
• 주제분류: 농수해양 > 기타농수해양
• 파일형태: PDF
• 발행일자: 2025.03.01

국문 초록

‘정다미’는 타 지역과 차별화 된 특화 품종으로 지역브랜드 쌀의 경쟁력을 높이고자 조생 단간이며 도열병에 강하고 저아밀로스(11.6%) 중간찰인 ‘월백’을 모본으로 흰잎마름병(K1, K2, K3)이 강한 중생종 대립찰인 ‘눈보라’와 중만생자포니카 다수성이면서 흰잎마름병(K1, K2, K3)과 줄무늬잎마름병에 강한 ‘보람찬’이 교배된 F1을 부본으로 교배 한 후 2020년 중간찰 벼로 육성하였다. 주요 농업적 특성은 중부평야지 4개소 보통기 보비재배에서 출수기가 평균 8월 15일로 ‘백진주’보다 6일 빠른 중만생종이고 간장은 77 ㎝로 적당하며 주당수수는 16개, 수당립수는 96개이고 현미천립중은 20.0 g으로 ‘백진주’와 비슷하다. 불시출수는 되지 않았고 성숙기 잎의 노화는 보통이고 수발아율은 1.7%로 ‘백진주’ 7.5%보다 높았다. 종합내냉성은7로 ‘백진주’와 비슷하게 약했고 포장에서 도복에 강했다. 흰잎마름병(균계 K1, K2, K3)에 강했고 잎도열병에는 중도저항성을 줄무늬잎마름병, 벼멸구 및 애멸구에 모두 약한 반응을 보였다. 백미 수량성은 10a당 평균 547 ㎏으로 ‘백진주’(472 ㎏)보다 16% 증수되었다. 입형은 정조 장폭비가 2.2, 현미장폭비가 1.8로 ‘백진주’와 비슷하게 단원형이며 배유부분이 ‘백진주’보다 맑아 외관품위가 우수하다. 단백질 함량은 6.2%였으며 아밀로스 함량은 11.5%로 중간찰이고 이는 대립유전자 Wx-mq 에서 기인하였다. 이러한 ‘정다미’는 부드러운 밥맛과 재배안정성으로 인해 지역 특화 브랜드 쌀 경쟁력을 높임으로써 쌀 소비 제고에 기여할 것이다.

영문 초록

“Jeongdami” is a specialized rice (Oryza sativa L.) variety developed to enhance the competitiveness of regional branded rice through its distinct characteristics, setting it apart from those from other regions. It is an early-maturing, semi-dwarf variety with strong resistance to rice blast and features intermediate stickiness with a low amylose content (11.6%), using “Wolbaek” as the maternal parent. The paternal parent is an F1 hybrid created by crossing the large-grain, intermediate-maturity glutinous rice variety “Nunbora,” which is resistant to bacterial blight (K1, K2, and K3), with “Boramchan,” a high-yield, medium-late Japonica variety that is resistant to bacterial blight (K1, K2, and K3) and stripe virus. The breeding process culminated in 2020, resulting in “Jeongdami.”. Key agricultural characteristics include an average heading date of August 15, which is 6 days earlier than “Baekjinju”, an important low amylose mid-late cultivar, making it a medium-late variety when grown in the four plains regions in the central plains of Korea. Its culm length is moderately short at 77 cm, with an average of 16 panicles per hill and 96 spikelets per panicle. The 1,000-grain weight of brown rice is 20.0 g, similar to that of “Baekjinju.” There was no premature heading, leaf senescence at maturity was moderate, and the pre-harvest germination rate was 1.7%, lower than that of “Baekjinju” (7.5%). The overall cold tolerance rating was 7, indicating weak tolerance similar to “Baekjinju;” however, the variety showed strong lodging resistance in the field. “Jeongdami” exhibited strong resistance to bacterial blight (K1, K2, and K3) and moderate resistance to leaf blast but showed susceptibility to stripe virus, brown planthopper, and white-backed planthopper. The average polished rice yield was 547 kg per 10a, a 16% increase compared to that of “Baekjinju” (472 kg). The grain shape, with a paddy grain length-to-width ratio of 2.2 and a brown rice length-to-width ratio of 1.8, was similar to that of “Baekjinju,” maintaining a short and round shape. The endosperm is clearer than that of “Baekjinju,” providing superior visual quality. The protein content was 6.2%, and the amylose content was 11.5%, indicating intermediate stickiness, which was attributed to the Wx-mq gene. Due to its soft texture and stable cultivation, “Jeongdami” will contribute to increasing rice consumption by enhancing the competitiveness of regionally branded rice with its excellent eating quality and cultivation stability. (Grant No. 9168).

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키워드

Rice Low amylose Disease resistance Jeongdami