1. QTL Mapping for Important Agronomic Traits in Synthetic Hexaploid Wheat Derived from Aegiliops tauschii ssp. tauschii
- Author
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Ma YU, Guo-yue CHEN, Lian-quan ZHANG, Ya-xi LIU, Deng-cai LIU, Ji-rui WANG, Zhi-en PU, Li ZHANG, Xiu-jin LAN, Yu-ming WEI, Chun-ji LIU, and You-liang ZHENG
- Subjects
genetic map ,QTL ,DArT ,agronomic traits ,synthetic wheat ,Aegilops tauschii ssp. tauschii ,Agriculture (General) ,S1-972 - Abstract
Aegiliops tauschii is classified into two subspecies: Ae. tauschii ssp. tauschii and Ae. tauschii ssp. strangulata. Novel genetic variations exist in Ae. tauschii ssp. tauschii that can be utilized in wheat improvement. We synthesized a hexaploid wheat genotype (SHW-L1) by crossing an Ae. tauschii ssp. tauschii accession (AS60) with a tetraploid wheat genotype (AS2255). A population consisting of 171 F8 recombinant inbred lines was developed from SHW-L1 and Chuanmai 32 to identify QTLs associated with agronomic traits. A new genetic map with high density was constructed and used to detect the QTLs for heading date, kernel width, spike length, spikelet number, and thousand kernel weight. A total of 30 putative QTLs were identified for five investigated traits. Thirteen QTLs were located on D genomes of SHW-L1, six of them showed positive effect on agronomic traits. Chromosome region flanked by wPt-6133–wPt-8134 on 2D carried five environment-independent QTLs. Each QTL accounted for more than 10% phenotypic variance. These QTLs were highly consistent across environments and should be used in wheat breeding.
- Published
- 2014
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