‘오대’/‘운봉40호’ 재조합자식계통 집단을 이용한 잎 크기 형질에 대한 QTL 분석

• Published in: Korean journal of breeding Vol. 56; no. 4; pp. 449 - 459
• Main Authors: 이은찬(Eunchan Lee), 조미현(Mihyun Cho), 전수진(Soojin Jun), 김화영(Hwayoung Kim), 배선화(Seon-Hwa Bae), 강명진(Myeongjin Kang), 오효자(Hyoja Oh), 오재현(Jae-Hyeon Oh), 정황원(HwangWeon Jeong), 안일평(Il-Pyung Ahn), 유재일(Jae Il Lyu), 지현소(Hyeonso Ji)
• Format: Journal Article
• Language: Korean
• Published: 한국육종학회 01.12.2024; The Korean Breeding Society
• Subjects: 농학; area; length; width; QTL; rice; leaf
• ISSN: 0250-3360; 2287-5174
• DOI: 10.9787/KJBS.2024.56.4.449

Leaf size is closely related to photosynthesis and greatly affects rice productivity. Therefore, the search for quantitative trait Locus (QTL) that regulates leaf size is important for improving productivity through rice breeding. The F9 recombinant inbred line (RIL) population from the cross between ‘Unbong 40’ (large leaves) and ‘Odae’ (ordinary size leaves) was grown in a test field, and the size traits of the flag leaves and 2nd leaves, along with stem and panicle length, were measured. Through QTL analysis of these traits, we detected 20 QTLs on chromosomes 1, 3, 6, 9, 11, and 12. In particular, the flag leaf length QTL qFLL3, the flag leaf area QTL qFLA3, the 2nd leaf length QTL q2LL3-2, and the 2nd leaf area QTL q2LA3 were clustered in the 149.0-161.6 cM region of chromosome 3, indicating that one QTL gene in this region may have pleiotropic effects that regulate the flag leaf length, flag leaf area, 2nd leaf length, and 2nd leaf area. In addition, the flag leaf width QTL qFLW9 and 2nd leaf width QTL q2LW9 were clustered in the 2.1-22.86 cM region on chromosome 9, which suggests that one QTL gene in this region may have pleiotropic effects that regulate both the flag leaf width and 2nd leaf width. These results serve as a valuable reference for breeding programs aiming to increase photosynthesis and yield by identifying QTLs for leaf size traits in Korean japonica rice. KCI Citation Count: 0