Maternal transmission of mitochondrial DNA in interspecific hybrids of Populus |
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| Authors: | O. P. Rajora J. W. Barrett B. P. Dancik C. Strobeck |
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| Affiliation: | (1) BioGenetica Inc., P.O. Box 8261, T6H 4P1 Edmonton, Alberta, Canada;(2) Department of Forest Science, University of Alberta, T6G 2H1 Edmonton, Alberta, Canada;(3) Department of Zoology, University of Alberta, T6G 2EG Edmonton, Alberta, Canada;(4) Present address: Forest Pest Management Institute, Forestry Canada, P.O. Box 490, P6A 5M7 Sault Ste. Marie, Ontario, Canada |
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| Abstract: | ![]()
Summary Restriction fragment analysis was conducted to investigate the mode of inheritance of mitochondrial (mt) DNA in F1 progeny of two P. deltoides x P. deltoides, three P. deltoides x P. nigra, and two P. deltoides x P. maximowiczii controlled crosses, and in Populus x canadensis by using 16 restriction endonucleases and two heterologous probes of cloned mtDNA fragments of maize. Five restriction fragment length polymorphisms (RFLPs) of mtDNA differentiated P. deltoides from P. nigra, whereas three RFLPs of mtDNA separated P. deltoides from P. maximowiczii. In all cases, F1 progeny of P. deltoides x P. nigra, and P. deltoides x P. maximowiczii, crosses had mtDNA restriction fragments of only their maternal P. deltoides parents. P. x canadensis had mtDNA restriction fragments of only P. deltoides. F1 progeny of intraspecific P. deltoides crosses also had the same mtDNA fragments as their maternal parent. The results clearly demonstrate uniparental-maternal inheritance of the mitochondrial genome in F1 interspecific hybrids of P. deltoides with P. nigra and P. maximowiczii. |
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| Keywords: | Poplars Mitochondrial genome Maternal inheritance Restriction fragment length polymorphism |
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