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Title:: Genetic Effects Analysis of Major Genes Underlying Plant Height and Main Stem Nodes in a Soybean Four way Recombinant Inbred Lines Population through Maximum Likelihood Method

Author(s):: ?NING Hai-long¹; LIANG Shi-xin¹; JIANG Hong-xin²; LI Wen-xia¹; XUE Hong¹; LI Qi¹; WU Hao¹; LI Wenbin¹; WANG De-liang²; ?1.Soybean Research Institute of Northeast Agricultural University/Key Laboratory of Soybean Biology in Chinese Ministry of Education/Key Laboratory of Biology and Breeding & Genetics for Soybean in Northeast China,Ministry of Agriculture,Harbin 150030,China；2.Insititute of Crop Development,Heilongjiang Academy of Landreclaimation Sciences,Jiamusi 154007,China

Keywords:: Soybean; Fourway recombinant inbred lines population; Major gene; Segregation analysis; Maximum likelihood method

Abstract:: ?In order to predict the existence of major gene that control plant height and main stem nodes in a fourway recombinant inbred lines population(Kenfeng 14×Kenfeng 15)×(Heinong 48×Kenfeng 19),three steps of constructing various model according to mating mode of multiple allels,estimating genetic effects by maximum likelihood method,selecting the best model,the genetic mode and genetic effects were analyzed.The result showed plant height was controlled by two major genes without interaction and inheridity mode,which were AA₁A₂×A₃A₄ andB₁B₂×B₁B₃,respectively.The additive effects of the first major gene were -4.9,6.22,20.33 and that of the second major gene were -9.39,26.23,and the heredity of the major genes was 97%.Main stem nodes was controlled by one major gene and inheridity mode wasA₁A₂×A₁A₃.The additive effects of the major gene were 16.82,-1.32,2.64,and the heredity was 21%.The result indicated it was feasible to carry out QTL mapping on plant height and main stem nodes through fourway recombinant inbred lines population(Kenfeng 14×Kenfeng 15)×(Heinong 48×Kenfeng 19).