Title |
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An intact mitochondrial cox1 gene and a pseudogene with different genomic configurations are present in apple cultivars 'Golden Delicious' and 'Delicious': Evolutionary aspects
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Accessrights |
open access |
Subject |
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Description |
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Abstract
en
We have characterized the mitochondrial cox1 gene copies in two apple cultivars 'Golden Delicious' and 'Delicious'. Both the cultivars contained an intact copy and a truncated copy of cox1. The intact 'Golden Delicious' and 'Delicious' cox1 genes, designated G-cox1 and D-cox1, respectively, were both found to be actually transcribed to give an RNA of approximately 1.7 kb. The two intact cox1 and two truncated copies (G-φcox1 and D-φcox1) shared a common 1115-bp segment flanked by four combinations of two different 5'- and 3'-sequences. PCR assay demonstrated that the configurations bearing G-cox1 and G-φcox1 existed in substoichiometric amounts within the mitochondrial genome of 'Delicious' whereas substoichiometric molecules carrying D-φcox1 were present in the 'Golden Delicious' mitochondrial genome. Although ancestor/descendant relationships cannot be inferred between the G-cox1 and D-cox1 arrangements, the results led us to hypothesize that (1) the 1115-bp segment containing part of the progenitor cox1 was duplicated, thereby generating a pseudo-cox1 copy, and (2) this was followed by homologous recombination across a portion of the 1115-bp repeats which gave rise to the descendant cox1 and pseudo-cox1 arrangements.
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Publisher |
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Elsevier B.V.
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Date |
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Language |
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Resource Type |
journal article |
Version Type |
AM |
Identifier |
HDL
http://hdl.handle.net/2115/48642
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Relation |
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isVersionOf
DOI
https://doi.org/10.1016/j.scienta.2011.05.037
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Journal |
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Scientia Horticulturae
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Volume Number130
Issue Number1
Page Start49
Page End53
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File |
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Oaidate |
2023-07-26 |