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Measuring Endoreduplication by Flow Cytometry of Isolated Tuber Protoplasts

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QTL analysis of potato tuberization.

J H van den Berg¹, E E Ewing, R L Plaisted

¹Department of Fruit and Vegetable Science, Cornell University, 134 Plant Science Building, 14853-5908, Ithaca, New York, USA.

TAG. Theoretical and Applied Genetics. Theoretische Und Angewandte Genetik

|October 29, 2013

Summary

This summary is machine-generated.

Researchers identified eleven quantitative trait loci (QTLs) influencing potato tuberization in crosses between Solanum tuberosum and S. berthaultii. Alleles from S. tuberosum revealed more QTLs, with significant additive and epistatic effects contributing to tuber development.

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Agrobacterium tumefaciens and Agrobacterium rhizogenes-Mediated Transformation of Potato and the Promoter Activity of a Suberin Gene by GUS Staining

Agrobacterium tumefaciens and Agrobacterium rhizogenes-Mediated Transformation of Potato and the Promoter Activity of a Suberin Gene by GUS Staining

Published on: March 29, 2019

Area of Science:

* Genetics and Plant Breeding
* Quantitative Genetics
* Crop Science

Background:

* Potato (Solanum tuberosum) tuberization is a complex trait influenced by multiple genetic factors.
* Understanding the genetic basis of tuberization is crucial for improving potato yield and cultivation.
* Wild potato relatives, like Solanum berthaultii, can possess valuable genetic resources for crop improvement.

Purpose of the Study:

* To identify and map quantitative trait loci (QTLs) associated with tuberization in potato.
* To analyze the genetic architecture, including additive, dominant, and epistatic effects, of tuberization.
* To investigate the inheritance patterns of tuberization-related alleles from different parent lines.

Main Methods:

* Reciprocal backcrosses were performed between Solanum tuberosum and Solanum berthaultii.
* Linkage analysis was conducted using RFLP markers and a framework map of the potato genome.
* QTLs were detected by analyzing segregation of traits and RFLP alleles.

Main Results:

* Eleven distinct QTLs influencing tuberization were identified across seven chromosomes.
* A major QTL on chromosome 5 explained 27% of the phenotypic variance in tuberization.
* More QTLs were detected using alleles from the recurrent Solanum tuberosum parent.
* Over half of the favorable tuberization alleles exhibited dominance.
* Additive effects explained up to 53% of variance, and epistasis increased this to 60%.

Conclusions:

* Multiple QTLs with varying effects contribute to potato tuberization.
* Both additive and epistatic interactions play significant roles in the genetic control of tuberization.
* Alleles from the wild relative S. berthaultii can positively influence tuberization.
* The identified QTLs provide targets for marker-assisted selection in potato breeding programs.