Genetic analysis of transparency and chalkiness area at different filling stages of rice (Oryza sativa L.) |
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| Affiliation: | 1. Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310029, China;2. Department of Biological Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310029, China;1. Institute of Biochemistry and Biology, University of Potsdam, Karl-Liebknecht-Str. 24–25, 14476 Potsdam, Germany;2. Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476 Potsdam, Germany;3. CIRAD, UMR AGAP, Avenue Agropolis, 34398 Montpellier, Cedex 5, France;1. Jiangsu Key Laboratory of Crop Genetics and Physiology, Key Laboratory of Plant Functional Genomics of the Ministry of Education, Jiangsu Key Laboratory of Crop Genetics and Physiology, College of Agriculture, Yangzhou University, Yangzhou 225009, Jiangsu Province, China;2. Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, Jiangsu Province, China;3. Centre for Nutrition & Food Sciences, Queensland Alliance for Agriculture & Food Innovations (QAAFI), The University of Queensland, QLD 4072, Australia;4. Department of Food Science & Engineering, Jinan University, 510632, Guangzhou Province, China;1. College of Agronomy, Nanjing Agricultural University, Nanjing 210095, PR China;2. Jiangsu Collaborative Innovation Center for Modern Crop Production, Nanjing 210095, PR China;1. Jiangsu Key Laboratory of Crop Genetics and Physiology, Key Laboratory of Plant Functional Genomics of the Ministry of Education, Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Agricultural College of Yangzhou University, Yangzhou 225009, China;2. Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, China |
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| Abstract: | Seven cytoplasmic male sterile lines and five restorer lines of indica rice (Oryza sativa L.) were used to analyze genetic effects on transparency and chalkiness area at four filling stages. A developmental genetic model for quantitative traits of triploid endosperm in cereal crops were used for the data analysis. The unconditional analysis showed that the accumulated genetic effects of genes expressed from the initial time (at flowering and fertilization) to the filling time t were all significant for transparency and chalkiness area. These results indicated that the genetic effects of the triploid endosperm, cytoplasmic and diploid maternal plant were all of importance for both traits at various filling stages, especially for maternal additive and dominance effects on transparency. The relatively high endosperm and maternal additive effects on transparency and chalkiness area indicated that the two traits could be improved by selection in early generations. From the conditional analysis for the net genetic effects of genes expressed during time t−1 to time t, new expression of genes in endosperm, cytoplasm and maternal plant for transparency and chalkiness area was found at most of the filling stages, especially from 8 to 14 days after flowering for transparency and from 1 to 14 days after flowering for chalkiness area. Predicted genetic effects and conditional genetic effects at different filling stages showed that transparency and chalkiness area of offspring could be improved by using some parents, such as Zuo 5, because of their better endosperm additive and cytoplasmic effects. |
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