Journal of Plant Research

, Volume 130, Issue 6, pp 989–997 | Cite as

Chromosome number and genome size variation in Colocasia (Araceae) from China

  • Guang-Yan Wang
  • Xiao-Ming Zhang
  • Min Qian
  • Xiang-Yang Hu
  • Yong-Ping Yang
Regular Paper

Abstract

Chromosome number and genome size are important cytological characters that significantly influence various organismal traits. We investigated chromosome number and genome size variation in 73 accessions belonging to four Colocasia species from China. Five different chromosome counts (2n = 26, 28, 38, 42, and 56) were found, the largest one representing a new record in Colocasia. The basic chromosome numbers are x = 13, 14, and 19, corresponding to 2x, 3x, and 4x cytotypes. Yunnan Province, China is considered the center of Colocasia polyploid origin. The 2C values in our accessions ranged from 3.29 pg in C. gigantea to 12.51 pg in C. esculenta. All species exhibit inter- and intraspecific chromosomal variation. Differences in DNA content among the Colocasia species seem to have occurred by chromosomal gain under similar habitats. Polyploidization also obviously contributes to 2C value variation.

Keywords

Chromosome number Colocasia Genome size Polyploidy 

Supplementary material

10265_2017_959_MOESM1_ESM.pdf (10.6 mb)
Supplementary material 1 (PDF 10849 KB)

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Copyright information

© The Botanical Society of Japan and Springer Japan KK 2017

Authors and Affiliations

  • Guang-Yan Wang
    • 1
    • 2
    • 4
  • Xiao-Ming Zhang
    • 1
    • 2
    • 3
  • Min Qian
    • 1
    • 2
  • Xiang-Yang Hu
    • 1
    • 2
  • Yong-Ping Yang
    • 1
    • 2
  1. 1.Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of BotanyChinese Academy of SciencesKunmingChina
  2. 2.Germplasm Bank of Wild Species, Kunming Institute of BotanyChinese Academy of SciencesKunmingChina
  3. 3.University of Chinese Academy of SciencesBeijingChina
  4. 4.School of Life Sciences, The Province Key Laboratory of the Biodiversity Study and Ecology Conservation in Southwest AnhuiAnqing Normal UniversityAnqingChina

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