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.
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Received: 8 June 1999 / Accepted: 30 December 1999
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Cheng, Z., Yu, H., Yan, H. et al. B chromosome in a rice aneuploid variation. Theor Appl Genet 101, 564–568 (2000). https://doi.org/10.1007/s001220051516
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DOI: https://doi.org/10.1007/s001220051516