Nature Genetics
Abstract
Inbreeding depression confers reduced fitness among the offspring of genetic relatives. As a clonally propagated crop, potato (Solanum tuberosum L.) suffers from severe inbreeding depression; however, the genetic basis of inbreeding depression in potato is largely unknown. To gain insight into inbreeding depression in potato, we evaluated the mutation burden in 151 diploid potatoes and obtained 344,831 predicted deleterious substitutions. The deleterious mutations in potato are enriched in the pericentromeric regions and are line specific. Using three F2 populations, we identified 15 genomic regions with severe segregation distortions due to selection at the gametic and zygotic stages. Most of the deleterious recessive alleles affecting survival and growth vigor were located in regions with high recombination rates. One of these deleterious alleles is derived from a rare mutation that disrupts a gene required for embryo development. This study provides the basis for genome design of potato inbred lines.
| 论文编号: | DOI:10.1038/s41588-018-0319-1 |
| 论文题目: | The Genetic Basis of Inbreeding Depression in Potato |
| 英文论文题目: | The Genetic Basis of Inbreeding Depression in Potato |
| 第一作者: | Chunzhi Zhang, Pei Wang, Die Tang, Zhongmin Yang, Fei Lu, Jianjian Qi, Nilesh R. Tawari, Yi Shang, Canhui Li and Sanwen Huang |
| 英文第一作者: | Chunzhi Zhang, Pei Wang, Die Tang, Zhongmin Yang, Fei Lu, Jianjian Qi, Nilesh R. Tawari, Yi Shang, Canhui Li and Sanwen Huang |
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| 发表年度: | 2019-01-24 |
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| 摘要: | Inbreeding depression confers reduced fitness among the offspring of genetic relatives. As a clonally propagated crop, potato (Solanum tuberosum L.) suffers from severe inbreeding depression; however, the genetic basis of inbreeding depression in potato is largely unknown. To gain insight into inbreeding depression in potato, we evaluated the mutation burden in 151 diploid potatoes and obtained 344,831 predicted deleterious substitutions. The deleterious mutations in potato are enriched in the pericentromeric regions and are line specific. Using three F2 populations, we identified 15 genomic regions with severe segregation distortions due to selection at the gametic and zygotic stages. Most of the deleterious recessive alleles affecting survival and growth vigor were located in regions with high recombination rates. One of these deleterious alleles is derived from a rare mutation that disrupts a gene required for embryo development. This study provides the basis for genome design of potato inbred lines. |
| 英文摘要: | Inbreeding depression confers reduced fitness among the offspring of genetic relatives. As a clonally propagated crop, potato (Solanum tuberosum L.) suffers from severe inbreeding depression; however, the genetic basis of inbreeding depression in potato is largely unknown. To gain insight into inbreeding depression in potato, we evaluated the mutation burden in 151 diploid potatoes and obtained 344,831 predicted deleterious substitutions. The deleterious mutations in potato are enriched in the pericentromeric regions and are line specific. Using three F2 populations, we identified 15 genomic regions with severe segregation distortions due to selection at the gametic and zygotic stages. Most of the deleterious recessive alleles affecting survival and growth vigor were located in regions with high recombination rates. One of these deleterious alleles is derived from a rare mutation that disrupts a gene required for embryo development. This study provides the basis for genome design of potato inbred lines. |
| 刊物名称: | Nature Genetics |
| 英文刊物名称: | Nature Genetics |
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| 其它备注: | Chunzhi Zhang, Pei Wang, Die Tang, Zhongmin Yang, Fei Lu, Jianjian Qi, Nilesh R. Tawari, Yi Shang, Canhui Li and Sanwen Huang. The Genetic Basis of Inbreeding Depression in Potato. Nature Genetics. DOI:10.1038/s41588-018-0319-1 |
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