Chromosome number variation in the emergent orchid model species Erycina pusilla

Hsuan Yu Yeh, Choun Sea Lin, Song Bin Chang

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

A species has always a set chromosome number to ensure fertile offspring. At least two different chromosome numbers (2n = 10 and 2n = 12) are reported for Erycina pusilla, suggesting two cytotypes. To reveal the genome homology between these two cytotypes, the cytogenetic and cytometric analyses were performed in the intercytotypic hybrids from reciprocal crosses (2n = 10 × 2n = 12 and 2n = 12 × 2n = 10). The parental genomes showed high similarity both in genomic composition and content based on the results of genomic in-situ hybridization and flow cytometry. Meiotic synaptic behavior revealed homeologous pairing with unpaired loops between parental chromosome pairing segments. These results demonstrated that the chromosome number variation of two cytotypes mainly resulted from chromosome rearrangements, not changes in genomic constitution.

Original languageEnglish
Title of host publicationOrchid biotechnology III
PublisherWorld Scientific Publishing Co. Pte Ltd
Pages51-60
Number of pages10
ISBN (Electronic)9789813109230
ISBN (Print)9813109211, 9789813109216
DOIs
Publication statusPublished - 2017 Jan 25

All Science Journal Classification (ASJC) codes

  • Agricultural and Biological Sciences(all)
  • Environmental Science(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Engineering(all)

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