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Homoeologous exchanges in allopolyploids: how Brassica napus established self‐control!
Homoeologous exchanges in allopolyploids: how Brassica napus established self‐control!
- Source :
- New Phytologist, New Phytologist, 2021, 229 (6), pp.3041-3043. ⟨10.1111/nph.17222⟩, New Phytologist, Wiley, 2021, 229 (6), pp.3041-3043. ⟨10.1111/nph.17222⟩, The New Phytologist
- Publication Year :
- 2021
- Publisher :
- HAL CCSD, 2021.
-
Abstract
- Summary Ensuring faithful homologous recombination in allopolyploids is essential to maintain optimal fertility of the species. Variation in the ability to control aberrant pairing between homoeologous chromosomes in Brassica napus has been identified. The current study exploited the extremes of such variation to identify genetic factors that differentiate newly resynthesised B. napus, which is inherently unstable, and established B. napus, which has adapted to largely control homoeologous recombination.A segregating B. napus mapping population was analysed utilising both cytogenetic observations and high‐throughput genotyping to quantify the levels of homoeologous recombination.Three quantitative trait loci (QTL) were identified that contributed to the control of homoeologous recombination in the important oilseed crop B. napus. One major QTL on BnaA9 contributed between 32 and 58% of the observed variation. This study is the first to assess homoeologous recombination and map associated QTLs resulting from deviations in normal pairing in allotetraploid B. napus.The identified QTL regions suggest candidate meiotic genes that could be manipulated in order to control this important trait and further allow the development of molecular markers to utilise this trait to exploit homoeologous recombination in a crop.<br />See also the Commentary on this article by Sourdille & Jenczewski, 229: 3041–3043.
- Subjects :
- 0106 biological sciences
chromosome synapsis
Physiology
[SDV]Life Sciences [q-bio]
Quantitative Trait Loci
Brassica
Plant Science
01 natural sciences
Chromosomes, Plant
cytogenetics
Self-Control
[SDV.GEN.GPL]Life Sciences [q-bio]/Genetics/Plants genetics
03 medical and health sciences
homoeologous exchanges
Ph1
Ph2
meiosis
[SDV.BV]Life Sciences [q-bio]/Vegetal Biology
polyploidy
ComputingMilieux_MISCELLANEOUS
030304 developmental biology
Recombination, Genetic
Genetics
0303 health sciences
crossover
Full Paper
biology
Research
Brassica napus
food and beverages
Full Papers
biology.organism_classification
PrBn
homoeologous recombination
010606 plant biology & botany
Subjects
Details
- Language :
- English
- ISSN :
- 0028646X and 14698137
- Database :
- OpenAIRE
- Journal :
- New Phytologist, New Phytologist, 2021, 229 (6), pp.3041-3043. ⟨10.1111/nph.17222⟩, New Phytologist, Wiley, 2021, 229 (6), pp.3041-3043. ⟨10.1111/nph.17222⟩, The New Phytologist
- Accession number :
- edsair.doi.dedup.....d4832ab06819a2f6514149317bfcc17f
- Full Text :
- https://doi.org/10.1111/nph.17222⟩