Linkage map construction and QTL mapping for morphological traits in Ipomoea trifida, a diploid sweetpotato relative
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View abstract on PubMed
Summary
This summary is machine-generated.Researchers mapped quantitative trait loci (QTLs) in Ipomoea trifida, a wild ancestor of sweetpotato. This study identified 37 QTLs, including a major QTL for leaf shape, advancing sweetpotato breeding for ornamental traits.
Area Of Science
- Genetics
- Plant Breeding
- Genomics
Background
- Ipomoea trifida is the closest diploid relative and wild ancestor of the autohexaploid sweetpotato, Ipomoea batatas.
- Understanding the genetic basis of I. trifida traits is crucial for improving sweetpotato breeding programs.
Purpose Of The Study
- To map quantitative trait loci (QTLs) in a diploid full-sib population of Ipomoea trifida.
- To construct a high-density genetic linkage map for I. trifida.
- To identify QTLs associated with morphological traits for potential application in sweetpotato breeding.
Main Methods
- Phenotypic evaluation of 11 morphological traits in 188 individuals under screenhouse conditions.
- Construction of a high-density genetic linkage map using 6410 single-nucleotide polymorphisms (SNPs).
- QTL mapping using the composite interval mapping approach with the fullsibQTL R package.
Main Results
- A high-density genetic map with 15 linkage groups spanning 2440.47 cM was constructed.
- A total of 37 QTLs were identified across the 11 evaluated traits.
- A major QTL on chromosome 3 explained up to 42.39% of the phenotypic variance for a leaf shape-related trait.
Conclusions
- The study successfully mapped QTLs in Ipomoea trifida, providing valuable genetic resources.
- QTL-linked markers can support sweetpotato breeding programs, particularly for ornamental traits.
- Reference genome refinement and identified QTLs advance genetic and genomic research in I. trifida.
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