Two reported cytotypes of the emergent orchid model species Erycina pusilla are two different species

Hsuan Yu Yeh, Choun Sea Lin, Hans de Jong, Song-Bin Chang

研究成果: Article

摘要

Each species is characterized by a specific set of chromosomes, which is described as the chromosome portrait or karyotype. In general, such a karyotype is the same for all individuals in the population. An exception to that rule has recently been found in the orchid Erycina pusilla, which has been reported to have two cytotypes with chromosome numbers of 2n = 10 and 2n = 12. Here, we examined the karyotypes of the two cytotypes and found differences in arm ratios and heterochromatin patterns as well as in the presence of satellite chromosomes and in the number and location of rDNA and telomeric repeat sites. These differences are extensive and would have required multiple chromosome rearrangements to generate the differences between the two karyotypes. We also found that F1 hybrids between the parents with the two different chromosome numbers resulted in sterile offspring, in accordance with our previous findings. The combination of hybrid sterility and extensively rearranged chromosomes supports the hypothesis that these two reported cytotypes are, in fact, two different species.

原文English
文章編號233
期刊Euphytica
213
發行號10
DOIs
出版狀態Published - 2017 十月 1

指紋

cytotypes
Chromosomes
karyotyping
chromosomes
Karyotype
chromosome number
heterochromatin
Heterochromatin
Ribosomal DNA
Infertility
Population

All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science
  • Genetics
  • Plant Science
  • Horticulture

引用此文

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Two reported cytotypes of the emergent orchid model species Erycina pusilla are two different species. / Yeh, Hsuan Yu; Lin, Choun Sea; de Jong, Hans; Chang, Song-Bin.

於: Euphytica, 卷 213, 編號 10, 233, 01.10.2017.

研究成果: Article

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