caa a22 4500 445322527 CHVBK 20180317142708.0 cr unu---uuuuu 170323e20111101xx s 000 0 eng 10.1007/s10681-011-0524-9 doi (NATIONALLICENCE)springer-10.1007/s10681-011-0524-9 Genetic structure composed of additive QTL, epistatic QTL pairs and collective unmapped minor QTL conferring oil content and fatty acid components of soybeans [Elektronische Daten] [Haiwang Li, Tuanjie Zhao, Yufeng Wang, Deyue Yu, Shouyi Chen, Ruibao Zhou, Junyi Gai] The relative importance of various types of quantitative trait locus (QTL) conferring oil content and its fatty acid components in soybean seeds was assessed through testing a recombinant inbred line (RIL) population (derived from KF1×NN1138-2) in randomized blocks experiments in 2004-2006. The contents of oil and oleic, linoleic, linolenic, palmitic and stearic acids were determined with automatic Soxhlet extraction system and gas chromatography, respectively. Based on the established genetic linkage map with 834 markers, QTLNetwork2.0 was used to detect QTL under the genetic model composed of additive, additive×additive (epistasis), additive×year and epistasis×year effects. The contributions to the phenotypic variances of additive QTL and epistatic QTL pairs were 15.7% (3 QTL) and 10.8% (2 pairs) for oil content, 10.4% (3 QTL) and 10.3% (3 pairs) for oleic acid, 11.6% (3 QTL) and 8.5% (2 pairs) for linoleic acid, 28.5% (7 QTL) and 7.6% (3 pairs) for linolenic acid, 27.0% (6 QTL) and 16.6% (7 pairs) for palmitic acid and 29.7% (5 QTL) and 4.3% (1 pair) for stearic acid, respectively. Those of additive QTL by year interaction were small and no epistatic QTL pair by year interaction was found. Among the 27 additive QTL and 36 epistatic QTL (18 pairs), three are duplicated between the two QTL types. A large difference was found between the genotypic variance among RILs and the total variance of mapped QTL, which accounted for 52.9-74.8% of the genotypic variation, much larger than those of additive QTL and epistatic QTL pairs. This part of variance was recognized as that due to a collection of unmapped minor QTL, like polygenes in biometrical genetics, and was designated as collective unmapped minor QTL. The results challenge the breeders for how to pyramid different types of QTL. In addition, the present study supports the mapping strategy of a full model scanning followed by verification with other procedures corresponding to the first results. Springer Science+Business Media B.V., 2011 Soybean [ Glycine max (L.) Merr.] nationallicence Oil and fatty acids nationallicence Additive QTL nationallicence Epistatic QTL pair nationallicence Collective unmapped minor QTL nationallicence Li Haiwang Soybean Research Institute, Nanjing Agricultural University, 210095, Nanjing, Jiangsu, People's Republic of China aut Zhao Tuanjie Soybean Research Institute, Nanjing Agricultural University, 210095, Nanjing, Jiangsu, People's Republic of China aut Wang Yufeng Soybean Research Institute, Nanjing Agricultural University, 210095, Nanjing, Jiangsu, People's Republic of China aut Yu Deyue Soybean Research Institute, Nanjing Agricultural University, 210095, Nanjing, Jiangsu, People's Republic of China aut Chen Shouyi Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, 100101, Beijing, People's Republic of China aut Zhou Ruibao Soybean Processing Research Institute, Henan University of Technology, 450052, Zhengzhou, Henan, People's Republic of China aut Gai Junyi Soybean Research Institute, Nanjing Agricultural University, 210095, Nanjing, Jiangsu, People's Republic of China aut Euphytica Springer Netherlands 182/1(2011-11-01), 117-132 0014-2336 182:1<117 2011 182 10681 https://doi.org/10.1007/s10681-011-0524-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10681-011-0524-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Li Haiwang Soybean Research Institute, Nanjing Agricultural University, 210095, Nanjing, Jiangsu, People's Republic of China aut NATIONALLICENCE 700 1- Zhao Tuanjie Soybean Research Institute, Nanjing Agricultural University, 210095, Nanjing, Jiangsu, People's Republic of China aut NATIONALLICENCE 700 1- Wang Yufeng Soybean Research Institute, Nanjing Agricultural University, 210095, Nanjing, Jiangsu, People's Republic of China aut NATIONALLICENCE 700 1- Yu Deyue Soybean Research Institute, Nanjing Agricultural University, 210095, Nanjing, Jiangsu, People's Republic of China aut NATIONALLICENCE 700 1- Chen Shouyi Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, 100101, Beijing, People's Republic of China aut NATIONALLICENCE 700 1- Zhou Ruibao Soybean Processing Research Institute, Henan University of Technology, 450052, Zhengzhou, Henan, People's Republic of China aut NATIONALLICENCE 700 1- Gai Junyi Soybean Research Institute, Nanjing Agricultural University, 210095, Nanjing, Jiangsu, People's Republic of China aut NATIONALLICENCE 773 0- Euphytica Springer Netherlands 182/1(2011-11-01), 117-132 0014-2336 182:1<117 2011 182 10681 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer