Mapping quantitative trait loci influencing panicle‐related traits from Chinese common wild rice (Oryza rufipogon) using introgression lines |
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Authors: | X. Luo F. Tian Y. Fu J. Yang C. Sun |
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Affiliation: | 1. State Key Laboratory of Plant Physiology and Biochemistry, National Evaluation Central for Agricultural Wild Plant (Rice), Laboratory of Crop Heterosis and Utilization of Ministry of Education, Department of Plant Genetics and Breeding, China Agricultural University, Beijing, 100094, China;2. State Key Laboratory of Genetic Engineering, Morgan‐Tan International Center for Life Sciences, School of Life Sciences, Fudan University, Shanghai 200433, China;3. Corresponding author, E‐mail: suncq@cau.edu.cn |
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Abstract: | Panicle‐related traits are important agronomic traits which directly associated with grain yield. In this study, we investigated quantitative trait loci (QTLs) associated with panicle‐related traits using a set of 265 introgression lines (ILs) of common wild rice (Oryza rufipogon Griff.) in the background of Indica high‐yielding cultivar Guichao 2 (O. sativa L.). A total of 39 QTLs associated with panicle‐related traits including panicle length (PL), primary branch number (PBN), secondary branch number (SBN), spikelet number per panicle (SPP) and spikelet density (SD), were detected in the ILs with single‐point analysis. The alleles of 20 QTLs derived from wild rice showed positive effects, and some QTLs, such as, QPl1b for PL, QPbn8 for PBN, QSd4 and QSd11b for SD and QSpp4 for SPP showed larger positive effects, providing good candidates and useful information for marker‐aided improvement of yield potential of rice. Most of the QTLs controlling SPP, SBN and SD were located in cluster or closely linked on chromosomes, and the directions of their additive effects were consistent, which explained the genetic basis of significant correlations between their phenotypic characters. |
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Keywords: | common wild rice introgression lines quantitative trait locus panicle‐related traits |
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