Marker-assisted breeding for transgressive seed protein content in soybean [Glycine max (L.) Merr

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik
Ying Hu ZhangJunyi Gai

Abstract

After two cycles of marker-assisted breeding on three loci, lines with transgressive segregation of 8.22-9.32 % protein content were developed based on four original soybean parents with 35.35-44.83 % protein content. Marker-assisted breeding has been an innovative approach in conventional breeding, which is to be further demonstrated, especially for quantitative traits. A study on continuous transgressive breeding for seed protein content (SPC) in soybean using marker-assisted procedures is reported here. The SPC of the recombinant inbred line (RIL) population XG varied in 38.04-47.54 % under five environments with P 1 of 35.35 %, P 2 of 44.34 % and total heritability of 89.11 %. A transgressive segregant XG30 with SPC 45.53 % was selected for further improvement. The linkage mapping of XG showed its genetic constitution composed of five additive QTL (32.16 % of phenotypic variation or PV) and two pairs of epistatic QTL (2.96 % PV) using 400 SSR markers with the remnant heritability 53.99 % attributed to the undetected collective of minor QTL. Another transgressive segregant WT133 with SPC 48.39 % was selected from the RIL population WT (44.83 % SPC for both parents). XG30 and WT133 were genotyped on the three major additive Q...Continue Reading

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Citations

Jun 8, 2017·International Journal of Molecular Sciences·Kyujung Van, Leah K McHale
Sep 3, 2018·Molecular Genetics and Genomics : MGG·Jimmy ObalaRajeev K Varshney
Aug 23, 2017·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Jianbo HeJunyi Gai
Nov 30, 2019·International Journal of Molecular Sciences·Tengfei ZhangShi Sun
Sep 1, 2018·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Liyuan PanJunyi Gai

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