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Maternal inheritance of the chloroplast genome in Eucalyptus globulus and interspecific hybrids

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posted on 2023-05-16, 13:06 authored by McKinnon, GE, Rene VaillancourtRene Vaillancourt, Paul TilyardPaul Tilyard, Bradley PottsBradley Potts
The utility of chloroplast DNA (cpDNA) in Eucalyptus, either as a molecular marker for genetic studies or as a potential vehicle for genetic manipulation, is based on knowledge of its mode of inheritance. Chloroplast inheritance in angiosperms can vary among and within species, and anomalous inheritance has been reported in some interspecific-hybrid combinations. In Eucalyptus, abnormalities of pollen-tube growth occur in a number of interspecific-hybrid combinations, and this might increase the likelihood of anomalous chloroplast transmission. We used a rapid PCR technique to determine chloroplast heritability in 425 progeny of Eucalyptus, comprising 194 progeny of the premier pulpwood species E. globulus and 231 interspecific hybrids between E. globulus and E. nitens (F1, F2, and backcrosses). At this sampling intensity, no pollen-mediated transmission of cpDNA was found in any of the 40 families tested. The results are discussed with reference to chloroplast engineering and the use of cpDNA as a seed-specific marker in phylogeographic studies of Eucalyptus.

History

Publication title

Genome

Volume

44

Issue

5

Pagination

831-835

ISSN

0831-2796

Department/School

School of Natural Sciences

Publisher

NRC Research Press

Place of publication

NRC Research Press Web site

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the environmental sciences

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