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Quantitative trait loci mapping for heading date and spikelet number in wheat (Triticum aestivum L.)based on two recombinant inbred line populations

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Abstract

Heading date (HD) and total spikelet number per spike (SNS) play important roles in the yield improvement of wheat. HD often influences the formation of total spikelets. Identifying various genes that control HD and SNS is vital for the yield improvement of wheat. Here, we used two recombinant inbred line (RIL) populations derived from crosses of Yangmai 12 (YM12)/Yanzhan 1 (YZ1) and Yangmai 4 (YM4)/YZ1 to construct two genetic linkage maps and identify QTL for HD and SNS. A total of sixteen QTL were detected, among which three QTL for HD and three QTL for SNS detected in the YM12/YZ1 population overlapped those detected in the YM4/YZ1 population, respectively. Two pleiotropic QTL regions (Cluster-2B and Cluster-7D) simultaneously controlling HD and SNS were detected in both two populations. Among the QTL for SNS, only the favored allele of QSns.Y12Y-2A/QSns.Y4Y-2A had a significantly positive effect on grain number per spike without negatively affecting thousand-grain weight. A kompetitive allele-specific PCR (KASP) marker for QSns.Y12Y-2A/QSns.Y4Y-2A had been developed and verified in a set of 256 diverse cultivars/lines to facilitate its applications. Then the genes within the physical interval of QSns.Y12Y-2A/QSns.Y4Y-2A were analyzed based on the spatiotemporal expression patterns, gene annotation, and orthologous search. Six candidate genes were expressed specially in spike or spikelet. These results provide a solid foundation for future fine mapping and cloning of QSns.Y12Y-2A/QSns.Y4Y-2A.

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Funding

This work was supported by the National Natural Science Foundation of China (31901544, 32071999), the National Key Research and Development Program of Jiangsu (BE2021335), the Seed Industry Revitalization Project of Jiangsu Province (JBGS2021047, JBGS2021006), and the Scientific research special fund of Lixiahe Institute of Agricultural Sciences (SJ(21)101).

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Authors and Affiliations

  1. College of Agronomy & Center for Crop Genome Engineering, Henan Agricultural University, Zhengzhou, 450046, Henan, China

    Wenjing Hu

  2. Key Laboratory of Wheat Biology and Genetic Improvement for Low & Middle Yangtze Valley, Ministry of Agriculture and Rural Affairs, Lixiahe Institute of Agricultural Sciences, Yangzhou, 225007, China

    Wenjing Hu, Dongmei Zhu, Jiang Liu, Die Zhao & Sen Liao

  3. Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China

    Yu Zhang & Weigang Xu

  4. Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing, 100081, China

    Jizeng Jia

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JZJ, and WGX proposed the project concept. WJH carried out the experiments and wrote the paper. WJH, DMZ, YZ, and SL assisted in performing the experiments and participated in the field trials. WJH, JL, and DZ participated in the data collection. All authors read and approved the final manuscript and its publication.

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Hu, W., Zhu, D., Zhang, Y. et al. Quantitative trait loci mapping for heading date and spikelet number in wheat (Triticum aestivum L.)based on two recombinant inbred line populations. Genet Resour Crop Evol 70, 1179–1195 (2023). https://doi.org/10.1007/s10722-022-01496-2

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