<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Mutational witches’ brooms (WB) spontaneously arise in the tree crown. There are no male cones in <italic>Pinus sibirica</italic> WB and pollination always occurs with normal pollen. We studied 2-year-old seed progeny obtained from open-pollinated cones of WB and normal crown (NC) pines. There were significant morphological differences in two pairs of WB and NC families, while the third family pair studied showed barely pronounced differences. Segregation analysis of WB seed progeny based on needle length (growth trait) and total bud number (branching trait) revealed that about half of seedlings had a normal phenotype, while mutants were from 15.6 to 35.7 %. The rest seedlings could not be unambiguously identified, because they have not yet fully demonstrated the phenotype. Looking normal seedlings from WB families differed not only from mutants but also from NC progeny. Therefore, the mutation had some effect on both mutant seedlings and seedlings with a normal phenotype. Moreover, the denser was maternal WB the more differences were observed between WB and NC progeny.</p></abstract>

Mutational witches’ brooms (WB) spontaneously arise in the tree crown. There are no male cones in Pinus sibirica WB and pollination always occurs with normal pollen. We studied 2-year-old seed progeny obtained from open-pollinated cones of WB and normal crown (NC) pines. There were significant morphological differences in two pairs of WB and NC families, while the third family pair studied showed barely pronounced differences. Segregation analysis of WB seed progeny based on needle length (growth trait) and total bud number (branching trait) revealed that about half of seedlings had a normal phenotype, while mutants were from 15.6 to 35.7 %. The rest seedlings could not be unambiguously identified, because they have not yet fully demonstrated the phenotype. Looking normal seedlings from WB families differed not only from mutants but also from NC progeny. Therefore, the mutation had some effect on both mutant seedlings and seedlings with a normal phenotype. Moreover, the denser was maternal WB the more differences were observed between WB and NC progeny.

Effect of witches’ broom mutation on growth of <italic>Pinus sibirica</italic> seedlings

Institute of Monitoring of Climatic and Ecological Systems, Siberian Branch

Silvae Genetica

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Effect of witches’ broom mutation on growth of  seedlings

Mutational witches’ brooms (WB) spontaneously arise in the tree crown. There are no male cones in Pinus sibirica WB and pollination always occurs with normal...

Effect of witches’ broom mutation on growth of Pinus sibirica seedlings

Published Online: Nov 06, 2020

Page range: 123 - 129

DOI: https://doi.org/10.2478/sg-2020-0017

Keywords
conifers, witches’ broom, seed progeny, morphology, branching

© 2020 Galina V. Vasilyeva et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Effect of witches’ broom mutation on growth of Pinus sibirica seedlings

Published Online: Nov 06, 2020

Page range: 123 - 129

DOI: https://doi.org/10.2478/sg-2020-0017

Keywordsconifers, witches’ broom, seed progeny, morphology, branching

© 2020 Galina V. Vasilyeva et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
conifers, witches’ broom, seed progeny, morphology, branching