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Identification of new QTL for yield-related traits in Chinese landrace and elite wheat varieties through a genome-wide linkage mapping

文献类型： 外文期刊

作者： Li, Yulian 1 ; Gao, Jie 1 ; Zhang, Rongzhi 1 ; Song, Guoqi 1 ; Zhang, Shujuan 1 ; Li, Wei 1 ; Li, Genying 1 ;

作者机构： 1.Shandong Acad Agr Sci, Crop Res Inst, Jinan, Peoples R China

2.Minist Agr & Rural Affairs, Key Lab Wheat Biol & Genet Improvement North Yell, Beijing, Peoples R China

3.Natl Engn Lab Wheat & Maize, Jinan 250100, Shandong, Peoples R China

关键词： Wheat; Quantitative trait locus; SNP; Spike length; Fertile spikelet number per spike; Thousand grain weight

期刊名称：EUPHYTICA （ 影响因子：1.895； 五年影响因子：2.181 ）

ISSN： 0014-2336

年卷期： 2020 年 216 卷 8 期

页码：

收录情况： SCI

摘要： Spike length (SL), fertile spikelet number per spike (SNS), thousand grain weight (TGW) and plant height (PH) are important agronomic traits related to yield in wheat. By the 55 K SNP assay, we constructed a high-density genetic linkage map with 186 F6 recombinant inbred lines developed between Chinese landrace wheat Banmangzi and an elite variety Jimai 22. Eighteen QTLs for SL, SNS, TGW and PH were detected. A new stable major QTL for SL was located on chromosome 2DS, with physical position 19.6 Mb and explaining 20.1-27.9% of the phenotypic variances in three environments, with the favorable allele from Banmangzi. And the QTL was co-located withQSNS.saas-2D.1andQPH.saas-2D.2which were detected in two environments and explained up to 18.5% of phenotypic variances for SNS. In addition, an major QTL for TGW was detected on chromosome 6AS, explaining 14.6-22.3% of the phenotypic variances in three environments. Four candidate genes for yield-related traits were identified, encoding IAA-amino acid hydrolase ILR1 and growth-regulating factor for SL, flowering promoting factor-like 1 and sucrose-phosphate synthase for TGW, respectively.

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