QTL identification of kernel composition traits with popcorn using both F2:3 and BC2F2 populations developed from the same cross |
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| Affiliation: | 1. UR Technologies et Valorisation Alimentaires, Centre d’Analyses et de Recherche, Faculté des Sciences, Université Saint-Joseph, B.P. 11-514 – Riad El Solh, Beirut, Lebanon;2. University of Balamand, Faculty of Sciences, Department of Biology, Koura, Lebanon;1. School of Remote Sensing and Geomatics Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China;2. School of Civil and Environmental Engineering, The University of New South Wales, Sydney 2025, Australia;3. Meteorological Observation Centre, China Meteorological Administration, Beijing 100081, China;4. School of Geodesy and Geomatics, Anhui University of Science and Technology, Huainan 232001, China;5. School of Computer and Information Engineering, Xiamen University of Technology, Xiamen 361024, China |
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| Abstract: | Quantitative trait loci (QTL) influencing three main kernel composition traits, starch, protein and oil concentrations, in unselected F2:3 and selected BC2F2 maize populations derived from the same cross of a dent corn inbred Dan232 × an elite popcorn inbred N04 under the same conditions were detected. Four and two QTL for starch, four and three QTL for protein, and four and one QTL for oil were detected in the two populations, respectively, with three QTL jointly detected. The proportion of phenotypic variation explained by a single QTL was 5.2–10.6%, 5.0–14.3%, and 6.2–8.5% for the three traits. Ten QTL had favorable alleles contributed by Dan232. Several QTL detected in this study had identical or similar chromosome regions to those previously identified with other maize germplasms. No QTL with opposite effects for kernel composition traits and popping characteristics were detected in the same or near marker intervals. This reflected that some QTL detected in this study seemed to contribute to trait variation in a diverse array of maize populations and environments, and the opportunity existed for improving popcorn's nutritional quality while maintaining acceptable popping characteristics. Inconsistent broad sense heritability and trait correlation estimates were also observed in the two populations. |
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