Recombinations and large structural variations shape the mosaic genomes of interspecific edible bananas
Admixture and polyploidization are major recognized eukaryotic genome evolutionary processes. Their impacts on genome dynamics vary among systems and are still partially deciphered. Many banana cultivars are triploid (sometimes diploid) interspecific hybrids between Musa acuminata (A genome) and M. balbisiana (B genome). They have no or very low fertility, are vegetatively propagated and have been classified as "AB," "AAB," or "ABB" based on morphological characters. We used NGS sequence data to characterize the A versus B chromosome composition of nine diploid and triploid interspecific cultivars, to compare the chromosome structures of A and B genomes and analyze A/B chromosome segregations in a polyploid context. We showed that interspecific recombination occurred frequently between A and B chromosomes. We identified two large structural variations between A and B genomes, a reciprocal translocation and an inversion that locally affected recombination and led to segregation distortion and aneuploidy in a triploid progeny. Interspecific recombination and large structural variations explained the mosaic genomes observed in edible bananas. The unprecedented resolution in deciphering their genome structure allowed us to start revisiting the origins of banana cultivars and provided new information to gain insight into the impact of interspecificity on genome evolution. It will also facilitate much more effective assessment of breeding strategies.
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Format: | Journal Article biblioteca |
Language: | English |
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Oxford University Press
2019-01-01
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Subjects: | bananas, chromosomes, genomes, evolution, interspecific hybridization, polyploidy, musa, |
Online Access: | https://hdl.handle.net/10568/99403 https://doi.org/10.1093/molbev/msy199 |
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dig-cgspace-10568-994032023-12-08T19:36:04Z Recombinations and large structural variations shape the mosaic genomes of interspecific edible bananas Baurens, F.C. Martin, G. Hervouet, C. Salmon, F. Yohoume D. Ricci, S. Rouard, M. Habas, R. Yahiaoui, N. D'Hont, A. bananas chromosomes genomes evolution interspecific hybridization polyploidy musa Admixture and polyploidization are major recognized eukaryotic genome evolutionary processes. Their impacts on genome dynamics vary among systems and are still partially deciphered. Many banana cultivars are triploid (sometimes diploid) interspecific hybrids between Musa acuminata (A genome) and M. balbisiana (B genome). They have no or very low fertility, are vegetatively propagated and have been classified as "AB," "AAB," or "ABB" based on morphological characters. We used NGS sequence data to characterize the A versus B chromosome composition of nine diploid and triploid interspecific cultivars, to compare the chromosome structures of A and B genomes and analyze A/B chromosome segregations in a polyploid context. We showed that interspecific recombination occurred frequently between A and B chromosomes. We identified two large structural variations between A and B genomes, a reciprocal translocation and an inversion that locally affected recombination and led to segregation distortion and aneuploidy in a triploid progeny. Interspecific recombination and large structural variations explained the mosaic genomes observed in edible bananas. The unprecedented resolution in deciphering their genome structure allowed us to start revisiting the origins of banana cultivars and provided new information to gain insight into the impact of interspecificity on genome evolution. It will also facilitate much more effective assessment of breeding strategies. 2019-01-01 2019-02-12T11:27:50Z 2019-02-12T11:27:50Z Journal Article Baurens, F.C.; Martin, G.; Hervouet, C.; Salmon, F.; Yohoume D.; Ricci, S.; Rouard, M.; Habas, R.; Yahiaoui, N.; D’Hont, A. (2018) Recombinations and large structural variations shape the mosaic genomes of interspecific edible bananas. Molecular Biology and Evolution, Online first November 6 2018. ISSN: 0737-4038 0737-4038 https://hdl.handle.net/10568/99403 https://doi.org/10.1093/molbev/msy199 en CC-BY-NC-4.0 Open Access application/pdf Oxford University Press Molecular Biology and Evolution |
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bananas chromosomes genomes evolution interspecific hybridization polyploidy musa bananas chromosomes genomes evolution interspecific hybridization polyploidy musa |
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bananas chromosomes genomes evolution interspecific hybridization polyploidy musa bananas chromosomes genomes evolution interspecific hybridization polyploidy musa Baurens, F.C. Martin, G. Hervouet, C. Salmon, F. Yohoume D. Ricci, S. Rouard, M. Habas, R. Yahiaoui, N. D'Hont, A. Recombinations and large structural variations shape the mosaic genomes of interspecific edible bananas |
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Admixture and polyploidization are major recognized eukaryotic genome evolutionary processes. Their impacts on genome dynamics vary among systems and are still partially deciphered. Many banana cultivars are triploid (sometimes diploid) interspecific hybrids between Musa acuminata (A genome) and M. balbisiana (B genome). They have no or very low fertility, are vegetatively propagated and have been classified as "AB," "AAB," or "ABB" based on morphological characters. We used NGS sequence data to characterize the A versus B chromosome composition of nine diploid and triploid interspecific cultivars, to compare the chromosome structures of A and B genomes and analyze A/B chromosome segregations in a polyploid context. We showed that interspecific recombination occurred frequently between A and B chromosomes. We identified two large structural variations between A and B genomes, a reciprocal translocation and an inversion that locally affected recombination and led to segregation distortion and aneuploidy in a triploid progeny. Interspecific recombination and large structural variations explained the mosaic genomes observed in edible bananas. The unprecedented resolution in deciphering their genome structure allowed us to start revisiting the origins of banana cultivars and provided new information to gain insight into the impact of interspecificity on genome evolution. It will also facilitate much more effective assessment of breeding strategies. |
format |
Journal Article |
topic_facet |
bananas chromosomes genomes evolution interspecific hybridization polyploidy musa |
author |
Baurens, F.C. Martin, G. Hervouet, C. Salmon, F. Yohoume D. Ricci, S. Rouard, M. Habas, R. Yahiaoui, N. D'Hont, A. |
author_facet |
Baurens, F.C. Martin, G. Hervouet, C. Salmon, F. Yohoume D. Ricci, S. Rouard, M. Habas, R. Yahiaoui, N. D'Hont, A. |
author_sort |
Baurens, F.C. |
title |
Recombinations and large structural variations shape the mosaic genomes of interspecific edible bananas |
title_short |
Recombinations and large structural variations shape the mosaic genomes of interspecific edible bananas |
title_full |
Recombinations and large structural variations shape the mosaic genomes of interspecific edible bananas |
title_fullStr |
Recombinations and large structural variations shape the mosaic genomes of interspecific edible bananas |
title_full_unstemmed |
Recombinations and large structural variations shape the mosaic genomes of interspecific edible bananas |
title_sort |
recombinations and large structural variations shape the mosaic genomes of interspecific edible bananas |
publisher |
Oxford University Press |
publishDate |
2019-01-01 |
url |
https://hdl.handle.net/10568/99403 https://doi.org/10.1093/molbev/msy199 |
work_keys_str_mv |
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