잡초벼 PBR 혐기발아 내성 유전자 활용 벼 담수직파 초기 입모 개선

• 영문명: Improvement of Seedling Establishment in Wet Direct Seeding of Rice using the Anaerobic Germination Tolerance Gene Derived from Weedy Photoblastic Rice
• 발행기관: 한국작물학회
• 저자명: 정종민(Jong-Min Jeong) 모영준(Youngjun Mo) 백만기(Man-Kee Baek) 김우재(Woo-Jae Kim) 조영찬(Young-Chan Cho) 하수경(Su-Kyung Ha) 김진희(Jinhee Kim) 정지웅(Ji-Ung Jeung) 김석만(Suk-Man Kim)
• 간행물 정보: 『한국작물학회지』제65권 제3호, 161~171쪽, 전체 11쪽
• 주제분류: 농수해양 > 기타농수해양
• 파일형태: PDF
• 발행일자: 2020.09.30

영문 초록

Direct seeding is one of the rice seedling establishment methods that is increasingly being practiced by farmers to save labor and reduce costs. However, this method often causes poor germination under flooding conditions after sowing. In this study, we developed japonica elite lines with quantitative trait loci (QTL) associated with anaerobic germination (AG) tolerance to overcome poor germination and seedling establishment in wet direct seeding. The QTL introgression lines were developed from a cross between weedy photoblastic rice as the AG donor and the Nampyeong variety via phenotypic and genotypic selection. Compared to Nampyeong, the survival rates of the selected lines were improved by approximately 50% and 240% under field and greenhouse conditions, respectively. To improve selection efficiency by marker assisted selection, the QTL markers associated with AG tolerance were converted to cleaved amplified polymorphic sequence markers designed based on next-generation sequence analysis. These lines retained similar agronomic traits and yield potential to the parent, Nampyeong. Among these lines, we selected the most promising line, which exhibited high survival rate and good agricultural traits under flooding conditions and named the line as Jeonju643. This line will contribute to breeding programs aiming to develop rice cultivars adapted to wet direct seeding. This study demonstrates the successful application of marker-assisted selection to targeted introgression of anaerobic genes into a premium quality japonica rice variety.

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키워드

anaerobic germination (AG) breeding direct seeding DNA markers rice