Identification and Validation of Quantitative Trait Loci Associated with Fruit Puffiness in a Processing Tomato Population

Physiological disorders impact the yield and quality of marketable fruit in tomato. Puffy fruit caused by cavities inside the locule can be problematic for processing and fresh market quality. In this paper, we used a recombinant inbred line (RIL) and three derived processing tomato populations to m...

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Bibliographic Details
Published in:Plants (Basel) 2024-05, Vol.13 (11), p.1454
Main Authors: Dalprá Dariva, Françoise, Subode, Su, Cho, Jihuen, Nick, Carlos, Francis, David
Format: Article
Language:English
Subjects:
Fruits
Gene mapping
Genetic aspects
Genetic crosses
Genetic testing
Genomes
genomic selection
Genomics
Identification and classification
Inbreeding
Marker-assisted selection
Physiological aspects
Physiology
Plant diseases
puffy fruit
Quantitative trait loci
Seeds
tomato breeding
Tomatoes
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Summary:Physiological disorders impact the yield and quality of marketable fruit in tomato. Puffy fruit caused by cavities inside the locule can be problematic for processing and fresh market quality. In this paper, we used a recombinant inbred line (RIL) and three derived processing tomato populations to map and validate quantitative trait loci (QTLs) for fruit puffiness across environments. Binary interval mapping was used for mapping the incidence of fruit puffiness, and non-parametric interval mapping and parametric composite interval mapping were used for mapping severity. Marker-trait regressions were carried out to validate putative QTLs in subsequent crosses. QTLs were detected on chromosome (Chr) 1, 2, and 4. Only the QTL on Chr 1 was validated in progeny from subsequent crosses. This QTL explained up to 22.5% of the variance in the percentage of puffy fruit, with a significant interaction between loci on Chr 2 and 4, increasing the percentage of puffy fruit by an additional 15%. The allele responsible for puffy fruit on Chr 1 was inherited from parent FG02-188 and was dominant towards increased incidence and severity. Marker-assisted selection (MAS) for the QTL on Chr 1 was as efficient as genomic selection (GS) in reducing the incidence and severity of puffy fruit, despite the potential contribution of other loci.
ISSN:2223-7747
2223-7747
DOI:10.3390/plants13111454