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Identification, genealogical structure and population genetics of S-alleles in Malus sieversii, the wild ancestor of domesticated apple | |
Ma, X.; Cai, Z.; Liu, W.; Ge, S.; Tang, L. | |
2017 | |
发表期刊 | HEREDITY |
ISSN | 0018-067X |
卷号 | 119期号:3页码:185-196 |
摘要 | The self-incompatibility (SI) gene that is specifically expressed in pistils encodes the SI-associated ribonuclease (S-RNase), functioning as the female-specificity determinant of a gametophytic SI system. Despite extensive surveys in Malus domestica, the S-alleles have not been fully investigated for Malus sieversii, the primary wild ancestor of the domesticated apple. Here we screened the M. sieversii S-alleles via PCR amplification and sequencing, and identified 14 distinct alleles in this species. By contrast, nearly 40 are present in its close wild relative, Malus sylvestris. We further sequenced 8 nuclear genes to provide a neutral reference, and investigated the evolution of S-alleles via genealogical and population genetic analyses. Both shared ancestral polymorphism and an excess of non-synonymous substitution were detected in the S-RNases of the tribe Maleae in Rosaceae, indicating the action of long-term balancing selection. Approximate Bayesian Computations based on the reference neutral loci revealed a severe bottleneck in four of the six studied M. sieversii populations, suggesting that the low number of S-alleles found in this species is mainly the result of diversity loss due to a drastic population contraction. Such a bottleneck may lead to ambiguous footprints of ongoing balancing selection detected at the S-locus. This study not only elucidates the constituents and number of S-alleles in M. sieversii but also illustrates the potential utility of S-allele number shifts in demographic inference for self-incompatible plant species. |
学科领域 | Plant Sciences |
DOI | 10.3389/fpls.2017.02182 |
收录类别 | SCI |
语种 | 英语 |
WOS关键词 | SELF-INCOMPATIBILITY POLYMORPHISM ; APPROXIMATE BAYESIAN COMPUTATION ; BALANCING SELECTION ; PAPAVER-RHOEAS ; STATISTICAL PROPERTIES ; PHYLOGENETIC ANALYSIS ; SORBUS-AUCUPARIA ; DIVERSITY ; NUMBER ; EVOLUTION |
WOS记录号 | WOS:000418584800002 |
出版者 | SPRINGERNATURE |
文献子类 | Article |
出版地 | LONDON |
EISSN | 1365-2540 |
资助机构 | National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31301747, 41661010] ; Scientific Research Foundation of Hainan University [kyqd1613, kyqd1617] |
作者邮箱 | tangliang@hainu.edu.cn |
作品OA属性 | Green Published, gold |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ibcas.ac.cn/handle/2S10CLM1/22063 |
专题 | 系统与进化植物学国家重点实验室 |
作者单位 | 1.[Ma, X. 2.Tang, L.] Hainan Univ, Inst Trop Agr & Forestry, Coll Trop Forestry, 58 Renming Rd, Haikou 570228, Hainan, Peoples R China 3.[Cai, Z. 4.Liu, W. 5.Ge, S. 6.Tang, L.] Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Ma, X.,Cai, Z.,Liu, W.,et al. Identification, genealogical structure and population genetics of S-alleles in Malus sieversii, the wild ancestor of domesticated apple[J]. HEREDITY,2017,119(3):185-196. |
APA | Ma, X.,Cai, Z.,Liu, W.,Ge, S.,&Tang, L..(2017).Identification, genealogical structure and population genetics of S-alleles in Malus sieversii, the wild ancestor of domesticated apple.HEREDITY,119(3),185-196. |
MLA | Ma, X.,et al."Identification, genealogical structure and population genetics of S-alleles in Malus sieversii, the wild ancestor of domesticated apple".HEREDITY 119.3(2017):185-196. |
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