Microevolutionary differentiation of cereal tetraploid species by formation of recombinant genomes
The process of microevolutionary differentiation of cereals by formation of recombinant genomes was studied in dynamics (F6–F17) with tetraploid wheat-rye amphidiploids as examples. Evidence that joint growing of tetra ploid amphidiploids having a common (pivotal) genome in their composition and dif...
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| Format: | Article |
| Language: | English |
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Siberian Branch of the Russian Academy of Sciences, Federal Research Center Institute of Cytology and Genetics, The Vavilov Society of Geneticists and Breeders
2016-08-01
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| Series: | Вавиловский журнал генетики и селекции |
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| Online Access: | https://vavilov.elpub.ru/jour/article/view/660 |
| _version_ | 1826550220920455168 |
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| author | N. I. Dubovets Ye. A. Sycheva |
| author_facet | N. I. Dubovets Ye. A. Sycheva |
| author_sort | N. I. Dubovets |
| collection | DOAJ |
| description | The process of microevolutionary differentiation of cereals by formation of recombinant genomes was studied in dynamics (F6–F17) with tetraploid wheat-rye amphidiploids as examples. Evidence that joint growing of tetra ploid amphidiploids having a common (pivotal) genome in their composition and differing in secondary (differential) genomes leads to their hybridization with high probability has been found. The forms developed are characterized by a very wide range of variability caused by different combinations of chromosomes and chromosome segments in differential genomes yet maintain the same structure of the pivotal genome. Intergenomic recombinations at the level of intact chromosomes were characteristic of homeologous groups with a high rate of stabili zation of the chromosomal composition, and recombinations at the level of chromosomal segments, of groups with a low stabilization rate, where heterologous chromosome pairs remained preserved for a long time. Dominance of regulatory genetic systems of the pivotal genome provides a high pairing level of homeologues from heterologous pairs in meiosis followed by intergenomic recombinations at the level of chromosome segments. Experimen tal data suggest that newly developed tetraploid forms interbreed easily forming a single hybrid zone, where permanent redistribution of genetic material of differential genomes and further range expansion of genotypic variability available to selection take place during alternation of generations whereby such a zone becomes a poten tial centre of speciation. Subsequent adaptive radiation of hybrid material in an ecologically separated environment occurs by selection of forms with different variants of the recombinant genome in various ecological niches. |
| first_indexed | 2024-03-07T16:07:14Z |
| format | Article |
| id | doaj.art-89aaa904d4094f32a59ff10c913c41bd |
| institution | Directory Open Access Journal |
| issn | 2500-3259 |
| language | English |
| last_indexed | 2025-03-14T06:33:53Z |
| publishDate | 2016-08-01 |
| publisher | Siberian Branch of the Russian Academy of Sciences, Federal Research Center Institute of Cytology and Genetics, The Vavilov Society of Geneticists and Breeders |
| record_format | Article |
| series | Вавиловский журнал генетики и селекции |
| spelling | doaj.art-89aaa904d4094f32a59ff10c913c41bd2025-03-05T07:59:21ZengSiberian Branch of the Russian Academy of Sciences, Federal Research Center Institute of Cytology and Genetics, The Vavilov Society of Geneticists and BreedersВавиловский журнал генетики и селекции2500-32592016-08-0120337838510.18699/VJ16.136493Microevolutionary differentiation of cereal tetraploid species by formation of recombinant genomesN. I. Dubovets0Ye. A. Sycheva1Institute of Genetics and Cytology of the National Academy of Sciences of BelarusInstitute of Genetics and Cytology of the National Academy of Sciences of BelarusThe process of microevolutionary differentiation of cereals by formation of recombinant genomes was studied in dynamics (F6–F17) with tetraploid wheat-rye amphidiploids as examples. Evidence that joint growing of tetra ploid amphidiploids having a common (pivotal) genome in their composition and differing in secondary (differential) genomes leads to their hybridization with high probability has been found. The forms developed are characterized by a very wide range of variability caused by different combinations of chromosomes and chromosome segments in differential genomes yet maintain the same structure of the pivotal genome. Intergenomic recombinations at the level of intact chromosomes were characteristic of homeologous groups with a high rate of stabili zation of the chromosomal composition, and recombinations at the level of chromosomal segments, of groups with a low stabilization rate, where heterologous chromosome pairs remained preserved for a long time. Dominance of regulatory genetic systems of the pivotal genome provides a high pairing level of homeologues from heterologous pairs in meiosis followed by intergenomic recombinations at the level of chromosome segments. Experimen tal data suggest that newly developed tetraploid forms interbreed easily forming a single hybrid zone, where permanent redistribution of genetic material of differential genomes and further range expansion of genotypic variability available to selection take place during alternation of generations whereby such a zone becomes a poten tial centre of speciation. Subsequent adaptive radiation of hybrid material in an ecologically separated environment occurs by selection of forms with different variants of the recombinant genome in various ecological niches.https://vavilov.elpub.ru/jour/article/view/660polyploid cerealsmicroevolutiontetraploid amphidiploidspivotal genomerecombinant genomeintergenomic recombinationsc-banding |
| spellingShingle | N. I. Dubovets Ye. A. Sycheva Microevolutionary differentiation of cereal tetraploid species by formation of recombinant genomes Вавиловский журнал генетики и селекции polyploid cereals microevolution tetraploid amphidiploids pivotal genome recombinant genome intergenomic recombinations c-banding |
| title | Microevolutionary differentiation of cereal tetraploid species by formation of recombinant genomes |
| title_full | Microevolutionary differentiation of cereal tetraploid species by formation of recombinant genomes |
| title_fullStr | Microevolutionary differentiation of cereal tetraploid species by formation of recombinant genomes |
| title_full_unstemmed | Microevolutionary differentiation of cereal tetraploid species by formation of recombinant genomes |
| title_short | Microevolutionary differentiation of cereal tetraploid species by formation of recombinant genomes |
| title_sort | microevolutionary differentiation of cereal tetraploid species by formation of recombinant genomes |
| topic | polyploid cereals microevolution tetraploid amphidiploids pivotal genome recombinant genome intergenomic recombinations c-banding |
| url | https://vavilov.elpub.ru/jour/article/view/660 |
| work_keys_str_mv | AT nidubovets microevolutionarydifferentiationofcerealtetraploidspeciesbyformationofrecombinantgenomes AT yeasycheva microevolutionarydifferentiationofcerealtetraploidspeciesbyformationofrecombinantgenomes |