1995•CYTOLOGIAOpen access

Meiotic Configuration of a Cultivated Rye Collected from China.

Go Horiuchi, Katsumasa Niwa, Yasokazu Hirai

Abstract

Meiotic configuration of a cultivated rye with B chromosomes from China was characterized. Plants with two B chromosomes formed the highest frequency of a bivalent of B chromosomes while the multivalent formation of B chromosomes in plants with four B chromosomes was relatively high. The existence of B chromosomes had negligible effect on the mean chiasma frequency of A chromosomes. Spontaneous reciprocal translocations of A chromosomes were also detected in two out of 40 plants examined with the length of chromosome segment involved in translocations assumed to be different in the two translocation heterozygotes.

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Key concepts: Chiasma, Chromosomal translocation, Biology, Bivalent (engine), Meiosis, B chromosome, Genetics, Chromosome