B chromosome in a rice aneuploid variation

Z. K. Cheng, H. X. Yu, H. H. Yan, M. H. Gu, L. H. Zhu

Research output: Contribution to journalArticle

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Abstract

An awned rice plant was discovered among the progeny of the triploid Zhongxian 3037. Cytological investigation showed that this awned plant was a variation with extra chromosomes. Based on the properties of the extra chromosomes during both meiosis and mitosis - e.g., short stature, darkly staining, instability in chromosome number, and lack of synapsis with A chromosomes - they could be considered to be B chromosomes in rice. The B chromosome(s) in both asexual and sexual progenies exhibited a unique segregation that is different from that of telotrisomics and other aneuploids. Moreover molecular marker analysis detected no dosage effects between the B-chromosome plant and the normal diploid of Zhongxian 3037, indicating that the B chromosomes might not be directly derived from any A-chromosome fragments in rice.

Original languageEnglish (US)
Pages (from-to)564-568
Number of pages5
JournalTheoretical and Applied Genetics
Volume101
Issue number4
DOIs
StatePublished - Jan 1 2000

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Keywords

  • B chromosome
  • Rice

ASJC Scopus subject areas

  • Biotechnology
  • Agronomy and Crop Science
  • Genetics

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