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Comparison ofArachis monticolawith Diploid and Cultivated Tetraploid Genomes Reveals Asymmetric Subgenome Evolution and Improvement of Peanut
https://orcid.org/0000-0002-6031-2677
AbstractLike many important crops, peanut is a polyploid that underwent polyploidization, evolution, and domestication. The wild allotetraploid peanut speciesArachis monticola(A. monticola) is an important and unique link from the wild diploid species to cultivated tetraploid species in theArachislineage. However, little is known aboutA. monticolaand its role in the evolution and domestication of this important crop. A fully annotated sequence of ≈2.6 GbA. monticolagenome and comparative genomics of theArachisspecies is reported. Genomic reconstruction of 17 wild diploids from AA, BB, EE, KK, and CC groups and 30 tetraploids demonstrates a monophyletic origin of A and B subgenomes in allotetraploid peanuts. The wild and cultivated tetraploids undergo asymmetric subgenome evolution, including homoeologous exchanges, homoeolog expression bias, and structural variation (SV), leading to subgenome functional divergence during peanut domestication. Significantly, SV‐associated homoeologs tend to show expression bias and correlation with pod size increase from diploids to wild and cultivated tetraploids. Moreover, genomic analysis of disease resistance genes shows the unique alleles present in the wild peanut can be introduced into breeding programs to improve some resistance traits in the cultivated peanuts. These genomic resources are valuable for studying polyploid genome evolution, domestication, and improvement of peanut production and resistance.
Comparison ofArachis monticolawith Diploid and Cultivated Tetraploid Genomes Reveals Asymmetric Subgenome Evolution and Improvement of Peanut
https://orcid.org/0000-0002-6031-2677
AbstractLike many important crops, peanut is a polyploid that underwent polyploidization, evolution, and domestication. The wild allotetraploid peanut speciesArachis monticola(A. monticola) is an important and unique link from the wild diploid species to cultivated tetraploid species in theArachislineage. However, little is known aboutA. monticolaand its role in the evolution and domestication of this important crop. A fully annotated sequence of ≈2.6 GbA. monticolagenome and comparative genomics of theArachisspecies is reported. Genomic reconstruction of 17 wild diploids from AA, BB, EE, KK, and CC groups and 30 tetraploids demonstrates a monophyletic origin of A and B subgenomes in allotetraploid peanuts. The wild and cultivated tetraploids undergo asymmetric subgenome evolution, including homoeologous exchanges, homoeolog expression bias, and structural variation (SV), leading to subgenome functional divergence during peanut domestication. Significantly, SV‐associated homoeologs tend to show expression bias and correlation with pod size increase from diploids to wild and cultivated tetraploids. Moreover, genomic analysis of disease resistance genes shows the unique alleles present in the wild peanut can be introduced into breeding programs to improve some resistance traits in the cultivated peanuts. These genomic resources are valuable for studying polyploid genome evolution, domestication, and improvement of peanut production and resistance.
Comparison ofArachis monticolawith Diploid and Cultivated Tetraploid Genomes Reveals Asymmetric Subgenome Evolution and Improvement of Peanut
https://orcid.org/0000-0002-6031-2677
AbstractLike many important crops, peanut is a polyploid that underwent polyploidization, evolution, and domestication. The wild allotetraploid peanut speciesArachis monticola(A. monticola) is an important and unique link from the wild diploid species to cultivated tetraploid species in theArachislineage. However, little is known aboutA. monticolaand its role in the evolution and domestication of this important crop. A fully annotated sequence of ≈2.6 GbA. monticolagenome and comparative genomics of theArachisspecies is reported. Genomic reconstruction of 17 wild diploids from AA, BB, EE, KK, and CC groups and 30 tetraploids demonstrates a monophyletic origin of A and B subgenomes in allotetraploid peanuts. The wild and cultivated tetraploids undergo asymmetric subgenome evolution, including homoeologous exchanges, homoeolog expression bias, and structural variation (SV), leading to subgenome functional divergence during peanut domestication. Significantly, SV‐associated homoeologs tend to show expression bias and correlation with pod size increase from diploids to wild and cultivated tetraploids. Moreover, genomic analysis of disease resistance genes shows the unique alleles present in the wild peanut can be introduced into breeding programs to improve some resistance traits in the cultivated peanuts. These genomic resources are valuable for studying polyploid genome evolution, domestication, and improvement of peanut production and resistance.
Comparison ofArachis monticolawith Diploid and Cultivated Tetraploid Genomes Reveals Asymmetric Subgenome Evolution and Improvement of Peanut
Advanced Science
Yin, Dongmei (author) / Ji, Changmian (author) / Song, Qingxin (author) / Zhang, Wanke (author) / Zhang, Xingguo (author) / Zhao, Kunkun (author) / Chen, Charles Y. (author) / Wang, Chuantang (author) / He, Guohao (author) / Liang, Zhe (author)
Advanced Science ; 7
2020-02-01
Article (Journal)
Electronic Resource
English
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