Genetic and cytological analyses reveal the recombination landscape of a partially differentiated plant sex chromosome in kiwifruit
文献类型：期刊论文
| 作者 | Pilkington, S. M.1; Tahir, J.2; Hilario, E.1; Gardiner, S. E.2; Chagne, D.2; Catanach, A.3; McCallum, J.3; Jesson, L.4; Fraser, L. G.1; McNeilage, M. A.1 |
| 刊名 | BMC PLANT BIOLOGY
 |
| 出版日期 | 2019-04-30 |
| 卷号 | 19页码:12 |
| 关键词 | Sex chromosome Evolution Sex determination Kiwifruit Actinidia Recombination suppression |
| ISSN号 | 1471-2229 |
| DOI | 10.1186/s12870-019-1766-2 |
| 英文摘要 | BackgroundAngiosperm sex chromosomes, where present, are generally recently evolved. The key step in initiating the development of sex chromosomes from autosomes is the establishment of a sex-determining locus within a region of non-recombination. To better understand early sex chromosome evolution, it is important to determine the process by which recombination is suppressed around the sex determining genes. We have used the dioecious angiosperm kiwifruit Actinidia chinensis var. chinensis, which has an active-Y sex chromosome system, to study recombination rates around the sex locus, to better understand key events in the development of sex chromosomes.ResultsWe have confirmed the sex-determining region (SDR) in A. chinensis var. chinensis, using a combination of high density genetic mapping and fluorescent in situ hybridisation (FISH) of Bacterial Artificial Chromosomes (BACs) linked to the sex markers onto pachytene chromosomes. The SDR is a subtelomeric non-recombining region adjacent to the nucleolar organiser region (NOR). A region of restricted recombination of around 6Mbp in size in both male and female maps spans the SDR and covers around a third of chromosome 25.ConclusionsAs recombination is suppressed over a similar region between X chromosomes and between and X and Y chromosomes, we propose that recombination is suppressed in this region because of the proximity of the NOR and the centromere, with both the NOR and centromere suppressing recombination, and this predates suppressed recombination due to differences between X and Y chromosomes. Such regions of suppressed recombination in the genome provide an opportunity for the evolution of sex chromosomes, if a sex-determining locus develops there or translocates into this region. |
| 资助项目 | National Natural Science Foundation of China[31772268] ; AGMARDT project[P16001] |
| WOS研究方向 | Plant Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000466982100003 |
| 出版者 | BMC |
| 源URL | [http://202.127.146.157/handle/2RYDP1HH/6608]  |
| 专题 | 中国科学院武汉植物园 |
| 通讯作者 | Zhang, Q. |
| 作者单位 | 1.New Zealand Inst Plant & Food Res Ltd PFR, Private Bag 92169, Auckland 1142, New Zealand 2.PFR, Private Bag 11600, Palmerston North 4442, New Zealand 3.PFR, Private Bag 4704, Christchurch 8140, New Zealand 4.PFR, Private Bag 1401, Havelock North 4157, New Zealand 5.Chinese Acad Sci, Wuhan Bot Garden, CAS Key Lab Plant Germplasm Enhancement & Special, Wuhan 430074, Hubei, Peoples R China 6.Chinese Acad Sci, Innovat Acad Seed Design, Wuhan 430074, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Pilkington, S. M.,Tahir, J.,Hilario, E.,et al. Genetic and cytological analyses reveal the recombination landscape of a partially differentiated plant sex chromosome in kiwifruit[J]. BMC PLANT BIOLOGY,2019,19:12. |
| APA | Pilkington, S. M..,Tahir, J..,Hilario, E..,Gardiner, S. E..,Chagne, D..,...&Zhang, Q..(2019).Genetic and cytological analyses reveal the recombination landscape of a partially differentiated plant sex chromosome in kiwifruit.BMC PLANT BIOLOGY,19,12. |
| MLA | Pilkington, S. M.,et al."Genetic and cytological analyses reveal the recombination landscape of a partially differentiated plant sex chromosome in kiwifruit".BMC PLANT BIOLOGY 19(2019):12. |
入库方式： OAI收割
来源：武汉植物园
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