1. Abnormal mitosis induced by wheat-rye 1R monosomic addition lines.
- Author
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Fu, Shu-Lan, Yang, Man-Yu, Ren, Zheng-Long, Yan, Ben-Ju, Tang, Zong-Xiang, and Gustafson, J.P.
- Subjects
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MITOSIS , *IN situ hybridization , *WHEAT diseases & pests , *CHROMOSOMAL translocation , *SELF-fertilization of plants , *GENETIC markers - Abstract
Octoploid triticale were derived from common wheat ( Triticum aestivum L. 'Mianyang11') × rye ( Secale cereale L. 'Kustro'), and some progeny were obtained by the backcrossing of triticale with 'Mianyang11' followed by self-fertilization. In situ hybridization using rye genomic DNA and repetitive sequences pAs1 and pSc119.2 as probes was used to analyze the mitotic chromosomes of these progeny. Three wheat-rye 1R monosomic addition lines and a wheat line (12FT-1685) containing a 1R and a 1BL.1RS translocation chromosome were identified. Abnormal mitosis was observed in the two lines. During mitosis of a 1R monosomic addition line (3-8-20-1R-2), lagging chromosomes, micronuclei, chromosomal bridges, and the one pole segregation of 1R chromosome were observed. Abnormal mitotic behaviour of chromosomes was also observed in some of the self-progeny plants of lines 12FT-1685 and 3-8-20-1R-2. These progeny contained 1R chromosome or 1R chromosome arm. In addition, 4B chromosomes were absent from one of the progeny of 3-8-20-1R-2. This abnormal mitotic behaviour of chromosomes was not observed in two other 1R monosomic addition lines. These results indicate that a single 1R chromosome added to wheat might cause abnormal mitotic behaviour of both wheat and rye chromosomes and different genetic variations might occurr among the sibling 1R monosomic addition lines. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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