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231225s2021 xx |||||o 00| ||eng c |
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|a 10.1111/nph.17225
|2 doi
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|a pubmed24n1067.xml
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|a eng
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|a Katche, Elvis
|e verfasserin
|4 aut
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|a Stable, fertile lines produced by hybridization between allotetraploids Brassica juncea (AABB) and Brassica carinata (BBCC) have merged the A and C genomes
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|c 2021
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 14.05.2021
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|a Date Revised 14.05.2021
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2021 The Authors New Phytologist © 2021 New Phytologist Trust.
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|a Many flowering plant taxa contain allopolyploids that share one or more genomes in common. In the Brassica genus, crop species Brassica juncea and Brassica carinata share the B genome, with 2n = AABB and 2n = BBCC genome complements, respectively. Hybridization results in 2n = BBAC hybrids, but the fate of these hybrids over generations of self-pollination has never been reported. We produced and characterized B. juncea × B. carinata (2n = BBAC) interspecific hybrids over six generations of self-pollination under selection for high fertility using a combination of genotyping, fertility phenotyping, and cytogenetics techniques. Meiotic pairing behaviour improved from 68% bivalents in the F1 to 98% in the S5 /S6 generations, and initially low hybrid fertility also increased to parent species levels. The S5 /S6 hybrids contained an intact B genome (16 chromosomes) plus a new, stable A/C genome (18-20 chromosomes) resulting from recombination and restructuring of A and C-genome chromosomes. Our results provide the first experimental evidence that two genomes can come together to form a new, restructured genome in hybridization events between two allotetraploid species that share a common genome. This mechanism should be considered in interpreting phylogenies in taxa with multiple allopolyploid species
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Brassica
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|a genome rearrangement
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|a homoeologous exchanges
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|a interspecific hybridization
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|a polyploidy
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|a Gaebelein, Roman
|e verfasserin
|4 aut
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|a Idris, Zurianti
|e verfasserin
|4 aut
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|a Vasquez-Teuber, Paula
|e verfasserin
|4 aut
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|a Lo, Yu-Tzu
|e verfasserin
|4 aut
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|a Nugent, David
|e verfasserin
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|a Batley, Jacqueline
|e verfasserin
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|a Mason, Annaliese S
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t The New phytologist
|d 1979
|g 230(2021), 3 vom: 15. Mai, Seite 1242-1257
|w (DE-627)NLM09818248X
|x 1469-8137
|7 nnns
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| 773 |
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|g volume:230
|g year:2021
|g number:3
|g day:15
|g month:05
|g pages:1242-1257
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|u http://dx.doi.org/10.1111/nph.17225
|3 Volltext
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