Genetic mapping of paternal sorting of mitochondria in cucumber.

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik
Claudia I CalderonM J Havey

Abstract

Mitochondria are organelles that have their own DNA; serve as the powerhouses of eukaryotic cells; play important roles in stress responses, programmed cell death, and ageing; and in the vast majority of eukaryotes, are maternally transmitted. Strict maternal transmission of mitochondria makes it difficult to select for better-performing mitochondria, or against deleterious mutations in the mitochondrial DNA. Cucumber is a useful plant for organellar genetics because its mitochondria are paternally transmitted and it possesses one of the largest mitochondrial genomes among all eukaryotes. Recombination among repetitive motifs in the cucumber mitochondrial DNA produces rearrangements associated with strongly mosaic (MSC) phenotypes. We previously reported nuclear control of sorting among paternally transmitted mitochondrial DNAs. The goal of this project was to map paternal sorting of mitochondria as a step towards its eventual cloning. We crossed single plants from plant introduction (PI) 401734 and Cucumis sativus var. hardwickii and produced an F(2) family. A total of 425 F(2) plants were genotyped for molecular markers and testcrossed as the female with MSC16. Testcross families were scored for frequencies of wild-type versu...Continue Reading

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Citations

Nov 15, 2015·Plant Science : an International Journal of Experimental Plant Biology·Magdalena PawełkowiczZbigniew Przybecki
Jul 18, 2016·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·A R Del Valle-EchevarriaM J Havey

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