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Tomato Analyzer: A Useful Software Application to Collect Accurate and Detailed Morphological and Colorimetric Data from Two-dimensional Objects

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A novel ditertiary tetrasomic in tomato.

¹Department of Vegetable Crops, University of California, Davis, California 95616.

|May 1, 1974

Summary

This study reports high transmission rates for a tomato ditertiary tetrasomic (5L.7S) chromosome. Novel monotertiary tetrasomics were also recovered, highlighting potential for genetic and evolutionary research.

Area of Science:

Plant genetics
Cytogenetics
Tomato breeding

Background:

Aneuploidy in plants can impact genetic stability and inheritance.
Understanding chromosome transmission is crucial for crop improvement and evolutionary studies.
Tomato (Lycopersicon esculentum Mill.) is a model organism for genetic research.

Purpose of the Study:

To investigate the transmission rates of a specific tomato ditertiary tetrasomic chromosome (5L.7S).
To identify and characterize novel monotertiary tetrasomic types in tomato.
To explore the utility of ditertiary tetrasomics in genetic and evolutionary research.

Main Methods:

Cytogenetic analysis of tomato (Lycopersicon esculentum Mill.) individuals.
Assessment of male and female transmission rates of the 5L.7S chromosome.

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Recovery and characterization of monotertiary tetrasomic lines from selfed progeny.

Main Results:

The 5L.7S ditertiary tetrasomic exhibited high transmission rates: 57.1% (male) and 74.5% (female).
Two 5L.7S tertiary chromosomes were successfully transmitted through the female gametophyte.
Novel monotertiary tetrasomics (2n + 5L.5S + 5L.7S) were identified in the progeny.

Conclusions:

The studied ditertiary tetrasomic demonstrates exceptional transmission efficiency in tomato.
This tetrasomic is a valuable tool for generating double trisomics and for dosage studies.
The findings contribute to experimental evolutionary research in Lycopersicon esculentum Mill.