Conditional QTL mapping of three yield components in common wheat (Triticum aestivum L.)
Han Zhang ,
Jiansheng Chen ,
Ruyu Li ,
Zhiying Deng ,
Kunpu Zhang ,
Bin Liu ,
Jichun Tian
Affiliations
Han Zhang
State Key Laboratory of Crop Biology, Ministry of Science and Technology/Key Laboratory of Crop Biology of Shandong Province, Department of Agronomy/Group of Wheat Quality Breeding, Shandong Agricultural University, Tai'an 271018, China
Jiansheng Chen
State Key Laboratory of Crop Biology, Ministry of Science and Technology/Key Laboratory of Crop Biology of Shandong Province, Department of Agronomy/Group of Wheat Quality Breeding, Shandong Agricultural University, Tai'an 271018, China
Ruyu Li
Crop Research Institute, Shandong Academy of Agricultural Sciences, Jinan 250100, China
Zhiying Deng
State Key Laboratory of Crop Biology, Ministry of Science and Technology/Key Laboratory of Crop Biology of Shandong Province, Department of Agronomy/Group of Wheat Quality Breeding, Shandong Agricultural University, Tai'an 271018, China
Kunpu Zhang
State Key Laboratory of Crop Biology, Ministry of Science and Technology/Key Laboratory of Crop Biology of Shandong Province, Department of Agronomy/Group of Wheat Quality Breeding, Shandong Agricultural University, Tai'an 271018, China
Bin Liu
State Key Laboratory of Crop Biology, Ministry of Science and Technology/Key Laboratory of Crop Biology of Shandong Province, Department of Agronomy/Group of Wheat Quality Breeding, Shandong Agricultural University, Tai'an 271018, China Crop Research Institute, Shandong Academy of Agricultural Sciences, Jinan 250100, China
Jichun Tian
State Key Laboratory of Crop Biology, Ministry of Science and Technology/Key Laboratory of Crop Biology of Shandong Province, Department of Agronomy/Group of Wheat Quality Breeding, Shandong Agricultural University, Tai'an 271018, China
Spike number per m2 (SN), kernel number per spike (KNPS) and thousand-kernel weight (TKW) are the three main components determining wheat (Triticum aestivum L.) yield. To evaluate the relationships among them a doubled haploid (DH) population consisting of 168 lines grown at three locations for three years was analyzed by unconditional and conditional QTL mapping. Thirty-three unconditional QTL and fifty-nine conditional QTL were detected. Among them, two QTL (QSN-DH-2B and QSN-DH-3A-1.1) improved SN, with no effect on KNPS. QKNPS-DH-2B-2.1 improved KNPS, with no effect on SN. QKNPS-DH-1A-1.1, QKNPS-DH-2D-1.1 and QKNPS-DH-6A improved KNPS, with no effect on SN or TKW. QKNPS-DH-6B was associated with increased SN and TKW. In addition, QTKW-DH-4B, QTKW-DH-5B and QTKW-DH-7B increased TKW without decreasing KNPS. These results provide useful information for marker assisted selection (MAS) and improvement in wheat yield.
