| Title: |
Identification of major QTLs for yield-related traits with improved genetic map in wheat |
| Author: |
Ma, Feifei; Xu, Yunfeng; Wang, Ruifang; Tong, Yiping; Zhang, Aimin; Liu, Dongcheng; An, Diaoguo |
| PubYear: |
2023 |
| Publication Name: |
FRONTIERS IN PLANT SCIENCE |
| Volume、Issue、Page Number: |
14;
;
|
| Impact Factor: |
|
| Abstract: |
IntroductionIdentification of stable major quantitative trait loci (QTLs) for yield-related traits is important for yield potential improvement in wheat breeding. MethodsIn the present study, we genotyped a recombinant inbred line (RIL) population using the Wheat 660K SNP array and constructed a high-density genetic map. The genetic map showed high collinearity with the wheat genome assembly. Fourteen yield-related traits were evaluated in six environments for QTL analysis. Results and DiscussionA total of 12 environmentally stable QTLs were identified in at least three environments, explaining up to 34.7% of the phenotypic variation. Of these, QTkw-1B.2 for thousand kernel weight (TKW), QPh-2D.1 (QSl-2D.2/QScn-2D.1) for plant height (PH), spike length (SL) and spikelet compactness (SCN), QPh-4B.1 for PH, and QTss-7A.3 for total spikelet number per spike (TSS) were detected in at least five environments. A set of Kompetitive Allele Specific PCR (KASP) markers were converted based on the above QTLs and used to genotype a diversity panel comprising of 190 wheat accessions across four growing seasons. QPh-2D.1 (QSl-2D.2/QScn-2D.1), QPh-4B.1 and QTss-7A.3 were successfully validated. Compared with previous studies, QTkw-1B.2 and QPh-4B.1 should be novel QTLs. These results provided a solid foundation for further positional cloning and marker-assisted selection of the targeted QTLs in wheat breeding programs. |
| DOI: |
http://dx.doi.org/10.3389/fpls.2023.1138696 |
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