Identification and validation of QTLs for 100-seed weight using chromosome segment substitution lines in soybean

文献类型： 外文期刊

第一作者： Liu, Dequan

作者： Liu, Dequan;Yan, Yongliang;Fujita, Yasunari;Xu, Donghe;Liu, Dequan;Fujita, Yasunari;Yan, Yongliang

作者机构：

关键词： 100-seed weight; wild soybean; cultivated soybean; QTL; CSSLs

期刊名称：BREEDING SCIENCE （ 影响因子：2.086； 五年影响因子：2.632 ）

ISSN： 1344-7610

年卷期： 2018 年 68 卷 4 期

页码：

收录情况： SCI

摘要： The 100-seed weight (100SW) is one of the most important traits that control soybean yield. To identify the quantitative trait loci (QTL) of 100SW, 120 BC3F5 chromosome segment substitution lines (CSSLs) were cultivated over three years. The CSSLs were developed from a cross between the cultivated soybean variety 'Jackson' and the wild soybean accession 'JWS156-1', followed by continuous backcrossing using 'Jackson' variety as a recurrent parent. A total of nine QTLs (qSW8.1, qSW9.1, qSW12.1, qSW13.1, qSW14.1, qSW16.1, qSW17.1, qSW17.2, and qSW20.1) were detected on eight chromosomes. Of these, qSW12.1 (LOD = 6.78-12.31) was detected over the three successive years on chromosome 12 as a novel, stable, and major QTL. To validate the effect of qSW12.1, a residual heterozygous line (RHL), RHL564, which showed heterozygous at the qSW12.1 region, was selected from the BC3F5 population. Of the two homologous genotypes in the progenies produced by self-pollination of RHL564, a higher seed weight was observed in the 'Jackson' genotype plants than that in the 'JWS156-1' genotype plants. qSW12.1 was delimited in an interval of approximately 1,348 kb between the BARCSOYSSR12_1282 and BARCSOYSSR_12_1347 markers on chromosome 12.

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