Identification and validation of new quantitative trait loci for spike-related traits in two RIL populations

Wheat ( Triticum aestivum L.) is one of the most important cereal crops for ensuring food security worldwide. Identification of major quantitative trait loci (QTL) for spike-related traits is important for improvement of yield potential in wheat breeding. In this study, by using the wheat 55K single...

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Bibliographic Details
Published in:Molecular breeding 2023-08, Vol.43 (8), p.64, Article 64
Main Authors: Wang, Yuying, Zeng, Zhankui, Li, Jiachuang, Zhao, Dehui, Zhao, Yue, Peng, Chen, Lan, Caixia, Wang, Chunping
Format: Article
Language:English
Subjects:
Arrays
Biomedical and Life Sciences
Biotechnology
Cereal crops
Chromosomes
Clusters
Food security
Gene mapping
Inbreeding
Life Sciences
Molecular biology
Nucleotides
Plant biology
Plant breeding
Plant Genetics and Genomics
Plant Pathology
Plant Physiology
Plant Sciences
Polymorphism
Populations
Quantitative trait loci
Review
Single-nucleotide polymorphism
Wheat
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Summary:Wheat ( Triticum aestivum L.) is one of the most important cereal crops for ensuring food security worldwide. Identification of major quantitative trait loci (QTL) for spike-related traits is important for improvement of yield potential in wheat breeding. In this study, by using the wheat 55K single nucleotide polymorphism (SNP) array and diversity array technology (DArT), two recombinant inbred line populations derived from crosses avocet/chilero and avocet/huites were used to map QTL for kernel number per spike (KNS), total spikelet number per spike (TSS), fertile spikelet number per spike (FSS), and spike compactness (SC). Forty-two QTLs were identified on chromosomes 2A (4), 2B (3), 3A (2), 3B (7), 5A (11), 6A (4), 6B, and 7A (10), explaining 3.13–21.80% of the phenotypic variances. Twelve QTLs were detected in multi-environments on chromosomes 2A, 3B (2), 5A (4), 6A (3), 6B, and 7A, while four QTL clusters were detected on chromosomes 3A, 3B, 5A, and 7A. Two stable and new QTL clusters, QKns/Tss/Fss/SC.haust-5A and QKns/Tss/Fss.haust-7A , were detected in the physical intervals of 547.49–590.46 Mb and 511.54–516.15 Mb, accounting for 7.53–14.78% and 7.01–20.66% of the phenotypic variances, respectively. High-confidence annotated genes for QKns/Tss/Fss/SC.haust-5A and QKns/Tss/Fss.haust-7A were more highly expressed in spike development . The results provide new QTL and molecular markers for marker-assisted breeding in wheat.
ISSN:1380-3743
1572-9788
1572-9788
DOI:10.1007/s11032-023-01401-4