Mapping QTLs with main and epistatic effect on Seri ‘M82 × Babax‘wheat population under salt stress

Nezhad, Nafiseh Mahdi; Kamali, Mohammad Reza; McIntyre, C. L.; Fakheri, Barat Ali; Omidi, Mohammad; Masoudi, Bahram

doi:10.1007/s10681-019-2450-1

Cited by 4 publications

(1 citation statement)

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“…Quantitative Trait Loci and Meta-Quantitative Trait Loci Distribution Over the Wheat Genome Analysis of the genetic control of quantitative traits is a challenge in plant breeding that is due to the complexity and the The MQTL analysis and the comparative genomic approaches help to identify consensus QTLs and conserved genes across genomes and species. In the current MQTL analysis, we used information from over 60% of the individual QTLs to identify MQTLs that showed the statistical power of MQTL analysis for combining wheat QTLs that were in the range of 54-84% that have been reported in the previous studies of MQTL in wheat (Löffler et al, 2009;Acuña-Galindo et al, 2015;Soriano and Alvaro, 2019). In this study, we narrowed down the confidence interval (CI) of the detected MQTL regions compared to the initial QTLs used in our MQTL analysis.…”

Section: Discussionmentioning

confidence: 99%

Comparative Genomic Analysis of Quantitative Trait Loci Associated With Micronutrient Contents, Grain Quality, and Agronomic Traits in Wheat (Triticum aestivum L.)

et al. 2021

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Comparative genomics and meta-quantitative trait loci (MQTLs) analysis are important tools for the identification of reliable and stable QTLs and functional genes controlling quantitative traits. We conducted a meta-analysis to identify the most stable QTLs for grain yield (GY), grain quality traits, and micronutrient contents in wheat. A total of 735 QTLs retrieved from 27 independent mapping populations reported in the last 13 years were used for the meta-analysis. The results showed that 449 QTLs were successfully projected onto the genetic consensus map which condensed to 100 MQTLs distributed on wheat chromosomes. This consolidation of MQTLs resulted in a three-fold reduction in the confidence interval (CI) compared with the CI for the initial QTLs. Projection of QTLs revealed that the majority of QTLs and MQTLs were in the non-telomeric regions of chromosomes. The majority of micronutrient MQTLs were located on the A and D genomes. The QTLs of thousand kernel weight (TKW) were frequently associated with QTLs for GY and grain protein content (GPC) with co-localization occurring at 55 and 63%, respectively. The co- localization of QTLs for GY and grain Fe was found to be 52% and for QTLs of grain Fe and Zn, it was found to be 66%. The genomic collinearity within Poaceae allowed us to identify 16 orthologous MQTLs (OrMQTLs) in wheat, rice, and maize. Annotation of promising candidate genes (CGs) located in the genomic intervals of the stable MQTLs indicated that several CGs (e.g., TraesCS2A02G141400, TraesCS3B02G040900, TraesCS4D02G323700, TraesCS3B02G077100, and TraesCS4D02G290900) had effects on micronutrients contents, yield, and yield-related traits. The mapping refinements leading to the identification of these CGs provide an opportunity to understand the genetic mechanisms driving quantitative variation for these traits and apply this information for crop improvement programs.

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Section: Discussionmentioning

confidence: 99%