Preliminary chromosome studies on Hippeastrum species from Vietnam

Tran Thi Minh Hang, Pham Thi Minh Phuong, Trinh Thi Mai Dung, Ikuo Miyajima

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Hippeastrum plants collected from different provinces of Vietnam and grown in the greenhouse at the Vietnam National University of Agriculture exhibit diversity in several morphological characteristics, especially in flower size and color. In order to understand the karyotypes and the phylogenesis of Hippeastrum species in Vietnam, somatic chromosome counts and karyotyping were performed for 97 Hippeastrum accessions. Chromosome counts showed that most (62 of 97 accessions, or 63.9%) Hippeastrum accessions in this collection are diploid with somatic chromosome number 2n = 2x = 22. Three accessions, or 3.1%, are triploid (2n = 3x = 33). This collection includes 32 tetraploids, or 33%, that have chromosome number 2n = 4x = 44. The karyotypes of three Hippeastrum species in Vietnam, including H. x 'Johnsonii', H. puniceum, and H. reticulatum var. striatifolia Herb, were analyzed. Karyotype variation among these three species included differences in chromosome lengths, long arm to short arm ratios, centromere positions, and chromosomes types. These species carry one to three unequal pair(s) of chromosomes in their chromosome complements. The results of this research will be useful for identification and classification of Hippeastrum species and subspecies.

Original languageEnglish
Pages (from-to)51-55
Number of pages5
JournalJournal of the Faculty of Agriculture, Kyushu University
Volume60
Issue number1
Publication statusPublished - Feb 1 2015

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Agronomy and Crop Science

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