CYTOLOGIA
Online ISSN : 1348-7019
Print ISSN : 0011-4545
Chromosome Transfer among Meiocytes in Brachiaria nigropedata (Ficalho & Hiern) Stapf (Gramineae)
Karina Sayuri UtsunomiyaMaria Suely PagliariniCacilda Borges do Valle
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JOURNAL OPEN ACCESS

2004 Volume 69 Issue 4 Pages 395-398

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Abstract

Cytological studies of microsporogenesis in tetraploid (2n=4x=36) and apomictic accessions of Brachiaria nigropedata revealed chromosome transfer between microsporocytes in early meiosis. Six, in 20 accessions available at Embrapa Beef Cattle Research Center, presented cytomixis in frequencies ranging from 0.6 to 9.7%. The number of cells involved in the phenomenon varied from 2 to 4, with predominance of the first. Transference of a few chromosomes to the whole genome was found among cells. Prior to cytomixis, chromatin underwent structural alteration similar to what is observed in chromosome stickiness. This is the first report of cytomixis in the genus Brachiaria. Possible origin and implications to pollen fertility are discussed.

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© (2004), The Japan Mendel Society
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