caa a22 4500 445323892 CHVBK 20180317142713.0 cr unu---uuuuu 170323e20110401xx s 000 0 eng 10.1007/s10681-010-0327-4 doi (NATIONALLICENCE)springer-10.1007/s10681-010-0327-4 Quantitative trait loci for seed dormancy in rice [Elektronische Daten] [Wei Li, Lei Xu, Xufeng Bai, Yongzhong Xing] Seed dormancy (SD) is controlled by its own complicated genetic factors and environmental factors. SD is an important trait affecting grain yield and quality in cereal crops. A population comprising 240 recombinant inbred lines (RIL) was used for detecting quantitative trait locus (QTL) for SD in rice. To minimize the effect of environment, data for lines for which the optimum temperature during the late ripening stage is either below 20°C or above 30°C were excluded from the analysis, which left 185 lines. In a dynamic germination test of the parents of the population, Minghui 63 showed clear SD and Zhenshan 97 showed none. The seeds of each RIL, harvested 32days after heading, were divided into two lots: seeds in one lot were sown immediately, without any treatment to break their dormancy, whereas seeds in the other lot were sown after they had been exposed to dry heat (50°C) for 72h. Composite interval mapping showed the presence of qDGE1, qDGR5a, qDGR5b, and qDGR7 in the first lot whereas only qDGR7 was detected in the second lot--which had been treated to break SD--indicating the strong influence of qDGR7 in controlling SD. A recently cloned Sdr4 is also located in the qDGR7 region. Coincidently, three rice homologues of Arabidopsis SD gene DOG1 were found in qDGE1 and qDGR5b regions where no SD QTL had been reported so far. These results indicate that the QTL found in this study are reliable, and that it would be worthwhile to clone qDGE1 and qDGR5b. Springer Science+Business Media B.V., 2010 Dry heat treatment nationallicence Composite interval mapping nationallicence Homologue nationallicence Oryza sativa nationallicence Li Wei National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research, Huazhong Agricultural University, 430070, Wuhan, China aut Xu Lei National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research, Huazhong Agricultural University, 430070, Wuhan, China aut Bai Xufeng National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research, Huazhong Agricultural University, 430070, Wuhan, China aut Xing Yongzhong National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research, Huazhong Agricultural University, 430070, Wuhan, China aut Euphytica Springer Netherlands 178/3(2011-04-01), 427-435 0014-2336 178:3<427 2011 178 10681 https://doi.org/10.1007/s10681-010-0327-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10681-010-0327-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Li Wei National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research, Huazhong Agricultural University, 430070, Wuhan, China aut NATIONALLICENCE 700 1- Xu Lei National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research, Huazhong Agricultural University, 430070, Wuhan, China aut NATIONALLICENCE 700 1- Bai Xufeng National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research, Huazhong Agricultural University, 430070, Wuhan, China aut NATIONALLICENCE 700 1- Xing Yongzhong National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research, Huazhong Agricultural University, 430070, Wuhan, China aut NATIONALLICENCE 773 0- Euphytica Springer Netherlands 178/3(2011-04-01), 427-435 0014-2336 178:3<427 2011 178 10681 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer