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《Journal of Nuclear Agricultural Sciences》 2018-02
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Identification of Quantitative Trait Loci and Epistatic Interactions for Seedling Hypocotyl Taits in Soybean Under Different Hydroponic Culture Nutrition Level

LIANG Huizhen;DONG Wei;XU Lanjie;YU Yongliang;YANG Hongqi;TAN Zhengwei;XIA Wei;CHEN Xinwei;Sesame Research Center,Henan Academy of Agricultural Sciences;Shangqiu Academy of Agriculture and Forestry Sciences;  
In order to study hypocotyl trait under different NPK conditions at seedling stage in soybean,and dig gene resources and reveal the genetic mechanisms. A set of 447 recombinant inbred line( RIL) derived from a cross between Jindou23( cultivar,female parent) and ZDD2315( semi-wild,male parent) was used as materials in this study.Epistatic QTL effects and QTLx enviroment interactions were identified in soybean under three treatments: CK( nonfertilized condition),T1( normal NPK fertilization conditions) and T2( high fertilization conditions of 1. 5 NPK).The results showed twenty QTLs for hypocotyl length and weight were detected on 9 chromosomes of 2,6,7,8,9,10,13,16 and 20 using composite interval mapping( CIM) method in this study; the variations accounted for by one signle QTL ranged from 3. 65% to 18. 13% . Three and two pair of epistatic QTLs for hypocotyl length and weight was detected respectively non-major QTLs by Compressed mixed linear model( MCIM). The 9 and 10 chromosome contained some QTLs for hypocotyl length and weight in three treatments,and showed that additive effects,additive × environment interactions effects and additive × additive epistatic effects are important genetic factors for hypocotyl length and weight formation and inheritance. The results will give a significant reference for hypocotyl traits QTL mapping,map-based cloning and marker-assisted selection in soybean at the seedling stage,and provide theoretical guidance to fertilization time at seedling stage in soybean and NPK use efficiency in the practical production.
【Fund】: 国家现代农业产业技术体系(CARS-21-03B-5);; 农业科研杰出人才及其创新团队;; 河南省农业科技攻关计划(152102110140、172102110088)
【CateGory Index】: S565.1
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