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Reference Report for SDS20160712.1
Title:Mapping quantitative trait loci for seed size traits in soybean
Authors:Xu, Y, Li, H, Li, G, Wang, X, Cheng, L, Zhang, Y
Source:Theor Appl Genet. 2011, 122(3):581-594
Abstract:Seed size traits in soybeanÑlength, width and thicknessÑand their corresponding ratiosÑlength-to- width, length-to-thickness and width-to-thicknessÑplay a crucial role in determining seed appearance, quality and yield. In this study, an attempt was made to detect quan- titative trait loci (QTL) for the aforementioned seed size traits in F2:3, F2:4 and F2:5 populations from the direct and reciprocal crosses of Lishuizhongzihuang with Nannong 493-1, using multi-QTL joint analysis (MJA) along with composite interval mapping (CIM). A total of 121 main- effect QTL (M-QTL), six environmental effects, eight environment-by-QTL interactions, five cytoplasmic effects and 92 cytoplasm-by-QTL interactions were detected. Fifty-two common M-QTL across MJA and CIM, 21 common M-QTL in more than two populations and 5 M-QTL in all three populations showed the stability of the results. Five M-QTL had higher heritability, greater than 20%. In addition, 28 cytoplasm-by-QTL and 4 envi- ronment-by-QTL interactions were confirmed by CIM. Most M-QTL were clustered in eight chromosomal regions. Our results provide a good foundation for fine mapping, cloning and designed molecular breeding of favorable genes related to soybean seed size traits.






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